BMW E90 Buyer Guide: 3 Series (2005-2011)
The E90 is the fifth-generation BMW 3 Series saloon, sold in the UK from 2005 to 2011. It is the last 3 Series to be available with naturally-aspirated petrol engines (the N52 family), the deepest pool of well-loved diesel sixes (M57 and N57 330d), and the chassis that the E9x M3 was built on. In 2026 it is firmly in the long-tail used market: prices are at or near their floor, parts supply is deep, and indie expertise is plentiful. This guide tells you what to check, which engine to pick, and what to expect to spend on a used E90 in 2026.
Quick verdict
The E90 is a value buy in 2026 if you pick the right engine and avoid the ULEZ trap. Petrols (N52 / N53 / N55) are Euro 4 or Euro 5 ULEZ-compliant from launch; diesels (M47 / N47 / M57 / N57) are not. The chassis-level wear items are predictable and cheap once you know what to look for: electric water pump, front lower control arm bushes, cooling system plastics, FRM3 module on LCI cars, and on M3s and heavy 335i / 330d, rear subframe mounting inspection. Avoid a pre-2011 N47 diesel without timing-chain history and you have a £4,000 to £8,000 well-kept near-classic 3 Series.
What is the BMW E90?
Most E90s in UK classifieds are 2008 to 2010 LCI 320d M Sport diesels with 100,000 to 160,000 motorway miles. That's the modal car. The 325i, 330i and 335i petrols are the ULEZ-friendly picks for London buyers; the 325d, 330d and 335d are the long-distance value picks if ULEZ is not a constraint. M3 (E90 saloon S65 V8) is a separate buying conversation: rare in UK saloon form (320 units), more common as E92 coupe, and a serious specialist ownership proposition with rod-bearing service and rear subframe inspection both due.
BMW UK's volume car between 2005 and 2011. Last 3 Series sold with naturally-aspirated engines (the N52 family). Now firmly in the long-tail used-diesel market, with most petrols ULEZ-compliant and most diesels not. A deep parts supply and decades of accumulated indie expertise make ownership cheap once the car is sorted.
| Series | 3 Series |
|---|---|
| Body style | Saloon |
| Generation | 5 |
| UK production years | 2005 to 2011 |
| Predecessor | E46 |
| Successor | F30 |
| LCI (facelift) year | 2008 |
| Related chassis | E91 (Touring (estate)), E92 (Coupe), E93 (Convertible), E90 M3 (M3 saloon (S65 V8, very rare in UK)), E92 M3 (M3 coupe (S65 V8, more common UK)) |
| Length / Width / Wheelbase | 4520 / 1817 / 2760 mm |
Pre-LCI vs LCI: what changed
BMW launched the E90 in March 2005 as the successor to the E46 3 Series. The most significant mid-cycle change happened in September 2008 with the Life Cycle Impulse (LCI) facelift. The LCI changed the headlights to LED clusters, refreshed front and rear bumpers, updated the iDrive from the failure-prone CCC to the much more reliable CIC, and added the FRM3 footwell module. Engines also transitioned around the same window: N52 petrol moved to N53 in 325i / 330i, M57 diesel moved to N57 in 325d / 330d, and the 335i moved from N54 twin-turbo to N55 single-turbo in 2010. Cars first registered after roughly October 2008 are the LCI cars; verify by the FRM3 module presence or by the iDrive version on viewing.
Engines and which to choose
For most UK buyers in 2026: the 325i (N52, pre-LCI) is the value petrol pick: naturally aspirated, smooth, ULEZ-compliant, cheaper to insure than the 335i. The 330d (M57, pre-LCI) is the value diesel pick if ULEZ is not a constraint: one of BMW's most-loved diesel engines, 300,000+ miles is realistic with documented servicing. The 335i (N54 or N55) is the enthusiast pick: tuning favourite, surprisingly cheap to run on standard map, but verify the HPFP recall on N54 builds. Avoid the N43 (316i / 318i / 320i LCI) unless you accept the documented injector and ignition coil service items. The 320d N47 is fine with timing-chain receipts but you'll never escape the rattle anxiety on viewings.
| Badge | Engine | Years | Power | Fuel | ULEZ | Notes |
|---|---|---|---|---|---|---|
| 316i | N45 |
2006-2007 | 115 bhp | petrol | Yes | Underpowered for the chassis; rare in UK |
| 316i | N43 |
2008-2011 | 122 bhp | petrol | Yes | LCI replacement for N45; N43 has injector and ignition coil weakness |
| 318i | N46 |
2005-2007 | 143 bhp | petrol | Yes | Naturally aspirated; cheap to run, slow |
| 318i | N43 |
2008-2011 | 143 bhp | petrol | Yes | LCI; same N43 injector weakness as 316i |
| 320i | N46 |
2005-2007 | 170 bhp | petrol | Yes | Pre-LCI; naturally aspirated |
| 320i | N43 |
2008-2011 | 170 bhp | petrol | Yes | LCI; N43 injector concerns |
| 325i | N52 |
2005-2008 | 218 bhp | petrol | Yes | Pre-LCI; one of BMW's best naturally-aspirated straight-sixes |
| 325i | N53 |
2008-2011 | 218 bhp | petrol | Yes | LCI; direct-injection N53 has documented spark-plug and high-pressure-fuel-pump issues |
| 330i | N52 |
2005-2008 | 258 bhp | petrol | Yes | Pre-LCI; the enthusiast pick of the naturally aspirated E90 line-up |
| 330i | N53 |
2008-2011 | 272 bhp | petrol | Yes | LCI direct-injection N53; spark-plug and HPFP service items recur |
| 335i | N54 |
2006-2010 | 306 bhp | petrol | Yes | Twin-turbo; tuning favourite; HPFP recall, charge pipe, wastegate rattle all documented |
| 335i | N55 |
2010-2012 | 306 bhp | petrol | Yes | Single-turbo LCI replacement for N54; calmer reliability profile |
| 316d | N47 |
2009-2011 | 116 bhp | diesel | No | Late E90 entry-diesel; pre-2011 N47 carries timing-chain risk |
| 318d | M47 |
2005-2007 | 122 bhp | diesel | No | Older diesel; reliable but not ULEZ-compliant |
| 318d | N47 |
2007-2011 | 143 bhp | diesel | No | N47 timing-chain risk especially on pre-2011 builds |
| 320d | M47 |
2005-2007 | 163 bhp | diesel | No | Pre-LCI; M47 is more robust than the N47 that replaces it but timing-chain still wears |
| 320d | N47 |
2007-2011 | 184 bhp | diesel | No | Most common E90 diesel; timing-chain risk is the dominant buyer concern |
| 320d EfficientDynamics | N47 |
2009-2011 | 163 bhp | diesel | No | Eco-tuned N47; lower power, better economy; still pre-Euro-6 |
| 325d | M57 |
2006-2009 | 197 bhp | diesel | No | Bi-turbo M57; strong long-distance pick if ULEZ is not a constraint |
| 325d | N57 |
2010-2011 | 204 bhp | diesel | No | Late E90 N57 entry-six diesel |
| 330d | M57 |
2005-2009 | 231 bhp | diesel | No | M57 is one of BMW's most-loved diesel engines; very robust |
| 330d | N57 |
2010-2011 | 245 bhp | diesel | No | LCI replacement for M57; smoother but plastic intake manifold and swirl flaps are wear items |
| 335d | M57 |
2006-2011 | 286 bhp | diesel | No | Bi-turbo M57; rare; massive torque; complex but well-regarded long term |
Engine codes link to the dedicated reliability guide where one exists. Codes without a guide link to the chassis × engine reference until the engine page is published.
ULEZ status by year and engine
Almost every E90 petrol is ULEZ-compliant: the N46, N43, N52, N53, N54 and N55 are all Euro 4 or better from their respective launch dates. ULEZ is not a constraint on E90 petrols. Diesels are the opposite story: M47, N47, M57 and N57 in the E90 are all Euro 4 or Euro 5, not Euro 6. None of them are ULEZ-compliant. If you live inside or commute through the London ULEZ, an E90 petrol is your option and an E90 diesel will cost you £12.50 per day each time you enter the zone. Always verify the V5 emissions class on the specific car before purchase.
Common E90-specific problems
Chassis-level failure modes only: body, electrics, infotainment, suspension, ancillaries. Engine-specific faults (timing chain, EGR, DPF) live on the engine guides linked above.
| Failure mode | Severity | Frequency | Typical onset | UK repair range |
|---|---|---|---|---|
| Electric water pump failure | Moderate | Very common | 60 to 110k mi | £450 to £700 |
| Rear subframe mounting point cracks | Serious | Uncommon | 80 to 200k mi | £400 to £900 |
| FRM3 (Footwell Module) failure | Serious | Common | 50 to 120k mi | £150 to £600 |
| Front lower control arm bushes | Moderate | Very common | 60 to 100k mi | £300 to £500 |
| Cooling system plastic failure (expansion tank, thermostat housing, hoses) | Moderate | Common | 70 to 130k mi | £200 to £500 |
| iDrive CCC head unit failure (pre-LCI cars) | Moderate | Common | 80 to 150k mi | £150 to £700 |
| VANOS solenoid hub bolt shear (N52 engines) | Serious | Uncommon | 80 to 150k mi | £200 to £400 |
Electric water pump failure
- Coolant warning light or low coolant message
- Heater blowing cold while engine is at temperature
- Fault codes related to coolant pump (2E81-2E83)
- Engine overheating in stop-start traffic
What to do about it: Replace electric water pump and thermostat together between 80,000 and 100,000 miles regardless of symptoms. Especially critical on N52 / N53 / N54 / N55 engines: the plastic pump housing is the documented weak point. Indie BMW specialist labour, around 2 hours.
If ignored: Engine overheats, head gasket damage on N52 / N53 with their aluminium-magnesium block, repair bill jumps to £1,500+ before knock-on damage.
UK repair exposure: £450 to £700.
Additional notes: Universal across N52, N53, N54, N55 family. The pre-LCI BMW design with belt-driven mechanical pump (N52 early) is more reliable; the electric pump that replaced it is the failure mode. Plan for it on any E90 past 80,000 miles.
Rear subframe mounting point cracks
- Clunk from the rear under hard acceleration
- Visible cracking in the body shell around the rear subframe mounts (boot floor area)
- Loose-feeling rear end especially on enthusiastic driving
- MOT advisory or fail on structural cracking
What to do about it: Inspect the rear subframe mounting points at every MOT past 80,000 miles, especially on M3 (S65 V8 vibration accelerates the issue) and on heavily-driven 335i / 330d examples. Welded reinforcement plates are the fix; specialist BMW body shop, around £400 to £900.
If ignored: Cracking propagates; eventual MOT failure on structural grounds; in worst case the subframe begins to separate. Repair becomes a full body-shop reinforcement job at £900+.
UK repair exposure: £400 to £900.
Additional notes: Most famous on the E9x M3 (S65 V8 vibration) but documented across the wider E90 range. Welded reinforcement plate kits are widely available. Honest indies inspect for it routinely.
FRM3 (Footwell Module) failure
- Indicators flashing erratically or not at all
- Interior or exterior lights randomly on, won't switch off
- Central locking unreliable
- Driver door window switches unresponsive
- Fault codes A0B9 / A0BA with FRM no-communication errors
What to do about it: On LCI E90 (post-2008) cars: re-flash the FRM3 module at an indie BMW specialist before symptoms appear. Some pre-2011 modules are known-faulty by build date; replacement coded module fixes them.
If ignored: Car can become un-driveable at night with no working lights. Sometimes triggers MOT failure on indicators or lighting checks.
UK repair exposure: £150 to £600.
Additional notes: Only applies to LCI E90 (post-September 2008). Pre-LCI cars use an older module without the FRM3 failure pattern.
Front lower control arm bushes
- Vibration through the steering wheel at motorway speeds
- Knocking from the front over potholes
- MOT advisory for front lower arm bush deterioration
- Uneven inner-edge tyre wear on the front
What to do about it: Replace both sides at the same time and follow with a four-wheel alignment. Polyurethane upgrades are available but stiffen ride; OEM rubber is the everyday-driver pick.
If ignored: Steering becomes vague; eventual MOT failure; accelerated tyre and joint wear.
UK repair exposure: £300 to £500.
Additional notes: Universal E90 wear item. Almost every E90 past 70,000 miles has at least an MOT advisory on these. Cheap to fix; standard buyer leverage.
Cooling system plastic failure (expansion tank, thermostat housing, hoses)
- Slow coolant loss with no visible major leak
- Coolant level warning every few weeks
- Stress cracks visible on the expansion tank or thermostat housing
What to do about it: Replace expansion tank, thermostat (and housing), upper and lower coolant hoses as a kit during the same job as the water pump. Total kit cost £150 to £300 in parts, plus around 2 hours labour combined with the pump.
If ignored: Sudden coolant loss, overheating, head gasket damage on the aluminium block N52 / N53 engines.
UK repair exposure: £200 to £500.
Additional notes: Plastic ages in heat cycles; not specific to E90 but compounded by the long service life of these cars. The BMW CCA / Mike Miller schedule recommends a full coolant system refresh every 60,000 miles or 4 years, whichever first.
iDrive CCC head unit failure (pre-LCI cars)
- iDrive screen blank or stuck at boot
- Bluetooth, navigation, or media playback failing
- Reboot loop, especially when cold
What to do about it: Some indies offer CCC rebuild service for £150 to £400. Replacement coded second-hand unit £300 to £700 fitted. Post-LCI cars use the updated CIC unit which is much more reliable; LCI buyers can largely ignore this.
If ignored: Cosmetic; car still drives. Resale value impacted at viewing. Some MOT testers note as advisory if reverse camera not displaying.
UK repair exposure: £150 to £700.
Additional notes: Only applies to pre-LCI cars (2005 to 2008) fitted with iDrive CCC. LCI cars (2008 onwards) use CIC and rarely show this failure mode.
VANOS solenoid hub bolt shear (N52 engines)
- Sudden running issues, misfire or rough idle
- Cam-position fault codes
- Metallic debris found in oil filter during service
What to do about it: Preventative bolt upgrade (BMW updated the bolt specification mid-cycle): £200 to £400 at an indie BMW specialist. Standard preventative on any N52 past 80k miles, especially N52KP variants.
If ignored: Bolt shear can drop hardware into the VANOS unit and potentially the engine internals. Worst case is engine rebuild at £3,000+.
UK repair exposure: £200 to £400.
Recall / TSB: BMW issued a TSB updating the VANOS hub bolt specification on N52 engines built before approximately March 2007. Confirm by VIN with a BMW dealer or indie.
Additional notes: Only applies to N52 petrol engines (325i / 330i pre-LCI, some 528i / 528xi US-spec). N53 and N54 use different VANOS hardware and are not affected.
MOT advisory patterns
Typical MOT advisories aggregated across UK F30 records. Not all will be present on any given car, but at 80,000+ miles you should expect at least two from this list:
- Front lower control arm bushes deteriorating
- Rear subframe mounting points (inspect on M3 and heavily-driven 335i / 330d)
- Brake disc corrosion on rear axle
- Coolant weep around the thermostat housing or expansion tank
- Anti-roll bar drop links worn
- Run-flat tyre sidewall damage from kerbing (on cars still on run-flats)
UK trim levels
The UK trim ladder for the E90, in roughly ascending order of equipment and used premium.
| Trim | Description |
|---|---|
| SE | Base trim. Cloth seats, basic alloys, manual or auto. Cheaper but lower equipment. |
| ES | Very-base US-leaning trim seen in some UK imports. Even lower spec than SE. |
| Sport | Sport seats, sport steering wheel, 17 inch alloys. Less aggressive than M Sport. |
| M Sport | Most common UK trim. M body kit, lowered sport suspension, sport seats, 18 inch M Sport alloys. Stiffer ride. |
| Edition / Edition Sport / Edition M Sport | Late-cycle (2010-2011) variants adding extra equipment or badging to existing trims. Edition M Sport is particularly well-equipped. |
| M3 | Separate car: E90 M3 saloon (rare UK), E92 M3 coupe (more common). S65 V8, 414 bhp, own suspension, own brakes, own diff. |
Options worth chasing
The factory options below add measurable used premium or change the ownership experience meaningfully.
| Option | Why it matters |
|---|---|
| Adaptive Drive (active anti-roll + EDC) | Rare option. Worth £400 to £800 used premium on a 335i or 330d; transforms cornering composure. Standard on M3. |
| Electric Damper Control (EDC) | Standalone option; adds variable damper firmness. Less commonly fitted than on later cars. |
| Comfort access (keyless entry and start) | Useful but has known battery-drain failure mode if the comfort-access aerial fails. |
| Electric memory front seats | Worth £300 used premium; useful if you share the car. |
| Heated front seats | Standard on M Sport from facelift; option on earlier or lower trims. |
| Harman Kardon hi-fi | Audible upgrade over the standard system. Adds £300 to £500 used premium. |
| Park Distance Control (PDC) | Standard later in the cycle; option earlier. Reverse camera was rarely fitted. |
| Bi-Xenon headlights | Big improvement on country roads vs the standard halogens. Standard on M Sport from facelift, option earlier. |
| Folding rear seats (40/20/40 split) | Standard on Touring, option on saloon. Useful for the rare time you need to carry long items. |
| iDrive CIC vs CCC | CIC (post-LCI 2008 onwards) is the buy; CCC (pre-LCI) is the documented failure-prone unit. |
| Limited-slip differential (LSD) | Standard on M3; aftermarket fit on 335i and 330d as a tuning upgrade. Adds drive engagement. |
| Folding electric mirrors | Cosmetic but commonly fail on cars without the option (the manual mirrors are sturdier). |
UK market pricing (2026)
| Example car | Indicative price | Notes |
|---|---|---|
| 2005 to 2006 320d SE, 130,000+ miles | £1,500 to £2,500 | Pre-LCI M47 diesel, not ULEZ-compliant. Cheap but factor cooling system and bushes. |
| 2007 320d M Sport, 100,000 miles | £2,500 to £4,000 | Either late M47 or early N47; N47 carries timing-chain risk. |
| 2010 LCI 320d M Sport, 90,000 miles | £3,500 to £5,500 | Sweet spot for diesel value if you don't need ULEZ compliance. |
| 2011 320d EfficientDynamics, 80,000 miles | £4,000 to £6,000 | Late E90 eco-spec; still pre-Euro-6 diesel. |
| 2010 LCI 325i M Sport, 80,000 miles | £5,000 to £7,000 | ULEZ-compliant petrol; N53 spark-plug servicing is the buyer item. |
| 2010 LCI 330d M Sport, 80,000 miles | £5,500 to £8,000 | Strong long-distance pick; N57 diesel; not ULEZ-compliant. |
| 2010 LCI 335i M Sport, 80,000 miles | £6,500 to £9,500 | N55 single-turbo (post-2010); ULEZ-compliant; cheaper running than the N54. |
| 2008 335i M Sport, 90,000 miles | £5,500 to £8,500 | N54 twin-turbo; check HPFP recall completed; tuning favourite. |
| 2010 E90 M3 (saloon, rare), 60,000 miles | £25,000 to £40,000 | Only 320 UK units. Cherry examples appreciating. Verify rear subframe inspection. |
| 2010 E92 M3 coupe, 60,000 miles | £22,000 to £35,000 | More common UK M3. S65 V8; rod bearing service is the major preventative. |
Price ranges are indicative UK figures for 2026 based on common AutoTrader listings. Real prices vary by region, history, and condition. View live AutoTrader listings for this chassis →
Pre-purchase checklist (E90-specific)
Add these E90-specific checks on top of our generic UK used-BMW inspection checklist:
- Confirm ULEZ status on the V5 emissions class. Petrols almost always compliant; diesels almost never. Run the reg through TfL's ULEZ checker before you travel.
- On any N47 diesel (2007 to 2011 builds): listen on a genuine cold start (overnight cold) for timing-chain rattle. Walk away from anything more than a couple of seconds of rattle without chain receipts.
- On any 335i N54: confirm the HPFP recall (high-pressure fuel pump) has been completed by VIN at a BMW dealer. Free remedy.
- On any N52 petrol (325i / 330i pre-LCI): ask about VANOS bolt history. £200 to £400 preventative work; serious if ignored.
- On any E90 past 80,000 miles: inspect the rear subframe mounting points (boot floor area). Critical on M3, important on 335i and 330d. Cracking is repairable but expensive if missed.
- Lock and unlock the car twice from the fob; check indicators and all lights respond every time (FRM3 module health check).
- Confirm iDrive functionality: try Bluetooth, media, reverse camera if fitted. CCC head units (pre-LCI) are documented failures; budget £150 to £700 if it freezes.
- Inspect coolant level and look for staining around the thermostat housing and expansion tank. Plastic ages and cracks; £200 to £500 for a full cooling system refresh.
Buy, negotiate, or walk away
Buy
Post-September-2008 LCI build, petrol (N52 / N53 / N55), full service history, electric water pump and front lower control arm bushes done within the last 30,000 miles, FRM3 not showing fault codes, no signs of cooling system weep, no rear subframe cracking visible.
Negotiate
Pre-LCI N47 diesel (factor £1,500 to £2,500 timing-chain risk and lack of ULEZ compliance). Pre-LCI car with iDrive CCC freeze (£150 to £700 for rebuild or replacement). Outstanding front control arm bush MOT advisory (£300 to £500). 335i N54 with no HPFP recall paperwork (free remedy but trip to BMW dealer needed). Cooling system shows weep (£200 to £500 for full refresh).
Walk away
Cold-start rattle on any N47 with no chain history. Visible cracks at the rear subframe mounting points (M3 or heavy 335i / 330d especially). Persistent FRM warnings on LCI cars that haven't been investigated. No service history at 150,000+ miles. Salvage or insurance write-off on HPI.
Long-term ownership verdict
Properly maintained, an E90 will run to 250,000+ miles regardless of engine. The chassis itself is well-resolved; the rear subframe mounting concern is real but addressable with a £400 to £900 reinforcement plate job. Most ancillary failures past 100,000 miles are routine and predictable (cooling, suspension, FRM on LCI cars). The N52 and M57 are widely considered two of BMW's best long-life engines ever built. In 2026, an E90 is a near-classic value buy: prices are at the floor, parts are plentiful, and indie expertise is everywhere. Buy on the service file, not the spec sheet.
Related chassis
The E90 shares its platform with related body styles and performance variants. Each is a different car with different fault patterns and a different used market.
Bimmer.AI is designed to help you identify BMW-specific buyer risks before you travel, negotiate, or pay for an inspection. It does not replace a physical inspection by a qualified mechanic, a legal vehicle-history check (e.g. HPI Check), or independent verification of finance, stolen, or write-off status. Repair-cost ranges are indicative UK figures that vary by region, specialist, parts supply, and labour rates.
Check a specific E90 listing
Paste any BMW E90 listing, VIN, or registration. Bimmer.AI returns a E90-specific buyer report in 30 seconds.
Run a Bimmer.AI buyer report →Frequently asked questions
Is the BMW E90 reliable?
Generally yes, with engine-specific caveats. The E90 chassis itself is well-resolved; the main E90-specific concerns are the electric water pump (60,000 to 110,000 miles), the FRM3 module on LCI cars, front lower control arm bushes, cooling system plastics, and on heavily-driven 335i / 330d / M3 cars, rear subframe mounting inspection. Engine reliability varies: the N52 (pre-LCI 325i / 330i) is exceptional, the M57 (pre-LCI 330d) is one of BMW's best diesels ever, but the N43 (LCI 318i / 320i) and N47 (LCI diesels) carry documented service items.
Pre-LCI vs LCI E90, which should I buy?
LCI (post-September 2008) is generally the better buy. The biggest reasons are the iDrive upgrade from the failure-prone CCC to the reliable CIC, LED tail-light clusters, the FRM3 footwell module, and the engine refresh (N53 replacing N52 on petrols, N57 replacing M57 on diesels). However, the pre-LCI N52 petrol is widely considered the most reliable E90 engine, so a pre-LCI 325i or 330i with the N52 is still an excellent buy. Trade-off varies by engine.
Is the BMW E90 ULEZ-compliant?
Petrols: almost universally yes (N46, N43, N52, N53, N54, N55 are all Euro 4 or better from launch). Diesels: almost universally no (M47, N47, M57, N57 are Euro 4 or Euro 5, not Euro 6). If you live in or commute through the London ULEZ, an E90 petrol works and an E90 diesel will cost you £12.50 per day inside the zone. Always verify on the V5 emissions class.
How much should I pay for a 2010 E90 320d M Sport?
In 2026, expect £3,500 to £5,500 with 90,000 miles, full service history and M Sport trim. The car is firmly in the long-tail used market. The single biggest variable is timing-chain history on the N47: a documented chain replacement adds £500 to £1,000 to a fair offer; missing chain history takes £500 to £1,000 off. ULEZ non-compliance is the second-biggest variable for London buyers.
Which E90 engine is the most reliable?
The M57 (pre-LCI 330d, 2005 to 2009) and N52 (pre-LCI 325i / 330i, 2005 to 2008) are widely considered the most reliable E90 engines. Both are well-engineered, undemanding to service, and capable of 300,000+ miles with documented servicing. The N47 diesel (2007 to 2011) is the most problematic, dominated by timing-chain risk. The N43 petrol (LCI 316i / 318i / 320i) has documented injector and coil issues. The N54 twin-turbo (335i pre-LCI) is reliable but has the HPFP recall to verify.
What's the difference between the E90, E91, E92 and E93?
Same generation, four body styles: E90 is the saloon (4-door), E91 is the Touring (estate), E92 is the Coupe (2-door), E93 is the Convertible (folding hardtop). They share most engines, all share the LCI cutoff in 2008. The E92 also got the E92 M3 (S65 V8), which has its own buying conversation; E90 M3 saloons exist but are very rare in UK (around 320 units).
Is the rear subframe cracking really a problem on the E90?
It's documented and well-known, particularly on M3 (S65 V8 vibration accelerates it) and on heavily-driven 335i and 330d examples. It's not universal: many E90s have done 200,000+ miles without subframe issues. The fix is welded reinforcement plates at a specialist BMW body shop, £400 to £900. Inspect the rear subframe mounting points in the boot floor area at any pre-purchase inspection past 80,000 miles.
Should I buy a 335i N54 or N55?
The N54 (2006 to 2010) is the legendary twin-turbo, beloved by tuners but with the HPFP fuel-pump recall to verify and slightly more long-tail maintenance exposure. The N55 (2010 to 2012, LCI) is the single-turbo replacement, calmer reliability profile and simpler to live with at standard power. For a stock buyer focused on long-term cost: N55. For a tuning enthusiast: N54, with eyes open to slightly higher running cost.
What's the best E90 to buy in 2026?
For most UK buyers: a 2010 LCI 325i M Sport with N53 petrol, 70,000 to 90,000 miles, full service history. ULEZ-compliant, naturally aspirated (well, technically direct-injection), strong long-term reliability, M Sport spec for resale. Around £5,000 to £7,000. The pre-LCI 325i N52 is also excellent at slightly less money but with the older iDrive CCC. The 330d M57 pre-LCI is the better long-distance pick if ULEZ is not a concern.
Can the E90 take aftermarket tuning?
The 335i (N54 and N55) is one of the most tuned BMW engines ever made: stage 1 maps add 80 to 120 bhp safely, stage 2 builds (with charge pipe, intercooler, exhaust upgrades) are common in the BMW tuning scene. The 330d M57 also responds very well to tuning. Naturally aspirated 325i / 330i (N52 / N53) gain less from tuning and are usually left stock. Verify any tuning at viewing has been declared on insurance and documented.