BMW 320i N43 (E93) · known issues, inspection and price bands

Pre-facelift or facelift, this engine spans both

The same badge either side of the changeover. Bands are split at the facelift year from the generation record.

Phase	Years	Low	Average	High	Good buy	What differs
pre Pre-facelift	2007–2009	€3,700	€5,150	€7,400	€4,450	The specification the car launched with.
LCI Facelift (LCI)	2010–2011	€4,050	€5,600	€8,050	€4,850	N55 replaced the N54 in the 335i; N57 replaced M57 in the six-cylinder diesels; Revised lights, bumpers and iDrive

Known issues, ranked by expected cost

Faults recorded against this engine, its components and its chassis, ranked by likelihood × repair cost. Costs are indicative ranges with a stated labour basis.

"Lifetime" fluid neglectZF 6HP19 / 6HP21 six-speed automatic€400–€2,500

Harsh or hunting shifts, a shunt between second and third, delayed engagement when cold. BMW declared the fluid a lifetime fill. It's not. Fluid degrades, the valve body wears, and the box eventually fails.

Check: Drive it from cold through every gear, then in manual mode. Ask when the fluid was last changed. "It's sealed for life" means never, and you should price a service in.

TransmissioncommonPartly detectableevidence: documented120–200k km

Dual-mass flywheel and clutch wearGetrag six-speed manual€900–€1,600

Rattle at idle with the clutch up that disappears when you press it, judder on pull-away, gearbox rumble. The dual-mass flywheel's springs wear. Diesels and tuned petrols wear them faster.

Check: Idle in neutral with the clutch up and listen, then press the clutch. A rattle that stops when you press is the flywheel. Also check for judder pulling away in first.

TransmissioncommonDetectable at viewingevidence: documented130–250k km

Carbon buildup on intake valvesdirect injection€400–€700

Rough cold idle, slow throttle response, misfires, gradual loss of low-end response. Direct injection puts no fuel over the intake valves, so crankcase vapour deposits bake on undisturbed.

Check: Not visible without a borescope. Treat it as a service item that's due unless there's a receipt. It's not a fault, it's an unbudgeted maintenance cost.

Turbo & intakeuniversalNot detectable at viewingevidence: documented80–120k km

Timing chain tensioner rattleN43B20€300–€1,400

Rattle for one to three seconds on cold start, worst after the car has stood overnight. The hydraulic tensioner bleeds down. Caught early it's a tensioner; ignored it becomes chain and guides.

Check: The car must be stone cold. Stand outside it at start-up and listen for a rattle from the front of the engine.

EnginecommonDetectable at viewingevidence: documented100–180k km

Front control arm bushing wearE9x chassis€300–€700

Knocking over bad surfaces, vague or wandering steering, uneven front tyre wear, steering shimmy under braking. The front lower arm bushings are a known wear item on this chassis and go well before the ball joints.

Check: Drive over a rough road at low speed with the windows down and listen. Check the inside edges of the front tyres for feathering.

SuspensionuniversalDetectable at viewingevidence: documented80–150k km

Folding hardtop mechanism and hydraulic faultsE93 body€500–€2,500

The roof stops mid-cycle, refuses to operate, or throws a roof warning; hydraulic fluid weeping in the boot. Microswitches, hydraulic rams and the boot-floor mechanism all wear. A roof stuck half-open isn't a drivable car.

Check: Cycle the roof fully open and fully closed at least twice, watching for hesitation, and check the boot for fluid. A seller who won't demonstrate the roof is telling you it's broken.

ElectricaloccasionalDetectable at viewingevidence: documented

Run-flat tyres and kerbed or cracked wheelsE9x chassis€150–€900

Harsh ride, vibration at speed, slow punctures. Stiff-sidewall run-flats transmit impacts straight into the rim, and these alloys crack rather than bend.

Check: Inspect the inner rim edge of every wheel for cracks and hairline splits, not just the face for kerbing. Budget for a set of conventional tyres; most owners switch and the ride improves markedly.

SuspensioncommonDetectable at viewingevidence: documented

Roof drain blockage and boot water ingressE93 body€150–€900

Water in the boot or rear footwells, damp smell, corroded connectors under the carpet. The convertible's drain channels block, and the water goes into the car.

Check: Lift the boot carpet and the spare wheel cover, and press the rear footwell carpets with your palm. Damp here on a convertible is the start of an electrical problem, not the end of a cosmetic one.

Body & corrosioncommonDetectable at viewingevidence: documented

Ranked by probability × repair cost, not by how loudly a failure is discussed. Inherited from the engine, gearbox, chassis and shared components, each written once. All 18 issues in full →

Pre-purchase inspection

The same issue records, reordered into the sequence you can actually check them in: cold start, static, drive, paperwork.

18 checks · saved in this browser ·

1Cold startYou get one. If the engine is warm when you arrive, come back another day.

Timing chain tensioner rattleThe car must be stone cold. Stand outside it at start-up and listen for a rattle from the front of the engine.

2Static checksEngine off, ideally on a lift.

Folding hardtop mechanism and hydraulic faultsCycle the roof fully open and fully closed at least twice, watching for hesitation, and check the boot for fluid. A seller who won't demonstrate the roof is telling you it's broken.Run-flat tyres and kerbed or cracked wheelsInspect the inner rim edge of every wheel for cracks and hairline splits, not just the face for kerbing. Budget for a set of conventional tyres; most owners switch and the ride improves markedly.Roof drain blockage and boot water ingressLift the boot carpet and the spare wheel cover, and press the rear footwell carpets with your palm. Damp here on a convertible is the start of an electrical problem, not the end of a cosmetic one.Corrosion at the rear subframe and arch seamsPut it on a lift and look at the rear subframe mounting points and the arch lips from behind. Largely a non-issue on cars from southern Europe, a real one on northern and Baltic cars.Mechatronic sleeve and pan gasket leakOn the lift, look at the gearbox pan and the bellhousing seam for wet ATF, it's red-brown and unmistakable.Footwell module (FRM) failureTest every window, both mirrors, the wipers, all exterior lights and the central locking before you drive. If any cluster of these is dead, this is why.Rear shock mount wearLift the boot floor and look at the top of the shock towers for cracking or a lifted mount. Listen for a knock over bumps.iDrive CCC head unit failureTurn it on and use it for a few minutes: navigation, radio, settings. Reboots during that window are the fault showing itself.Coolant expansion tank crackingLook at the tank with the engine warm, dried coolant leaves a white or pink crust. Cheap to fix, but it tells you how the car has been maintained.

3On the driveInclude low-speed manoeuvring, not just an open road.

"Lifetime" fluid neglectDrive it from cold through every gear, then in manual mode. Ask when the fluid was last changed. "It's sealed for life" means never, and you should price a service in.Dual-mass flywheel and clutch wearIdle in neutral with the clutch up and listen, then press the clutch. A rattle that stops when you press is the flywheel. Also check for judder pulling away in first.Front control arm bushing wearDrive over a rough road at low speed with the windows down and listen. Check the inside edges of the front tyres for feathering.xDrive transfer case actuator failureFull-lock circles in both directions in a car park, slowly, listening for binding. Check all four tyres are the same brand and wear, mismatched tyres destroy these.

4PaperworkOn these cars the folder is most of the value.

Carbon buildup on intake valvesNot visible without a borescope. Treat it as a service item that's due unless there's a receipt. It's not a fault, it's an unbudgeted maintenance cost.Unregistered replacement batteryAsk when the battery was changed and whether it was registered. A car with a new battery, no registration and a scatter of odd electrical faults usually just needs coding.

5OBD scanMandatory. A seller who refuses a scan has answered the question.

NOx sensor failureScan for NOx sensor and lean-mode codes. Ask the seller what the car returns on a run. A lean-burn four that drinks like a six has a dead sensor.Piezo injector failure (lean-burn petrol)Scan for per-cylinder misfires and check how many injectors have already been replaced. A car with all six done recently is worth a real premium over one with none.

Mileage and servicing

What the odometer does and doesn't tell you here, plus the service items whose neglect causes the expensive failures above.

Ignore the odometer and count the injector receipts. Six injectors at €350–500 each is €2,000–3,000 on a car worth €5,000, so the only versions of this car worth buying are the ones where a previous owner has already paid that bill. Short-trip cars fare worst.

Service item	Interval	Cost
Injector history The single item that determines whether this car is cheap or ruinous	check before purchase	€350–500 each
Spark plugs and coils Misfires get blamed on injectors when the plugs are the cause	40,000–50,000 km	€200–350
Engine oil Chain tensioner wear follows oil condition	10,000–12,000 km	€90–140

What to pay

What this engine sells for, against the median of every engine in the chassis. All figures are illustrative placeholders. See the basis chips.

median €5.4k

€3.7k€4.5k€8.1k

Cheapfind the reasonGood buyif it checks outFairnormal moneyOverpricedneeds justifying

Asking price (€)Mileage (km)

Enter an asking price to get a verdict against this variant's band: cheap, fair, good buy or overpriced.

United States vs Europe

1 EUR = 1.08 USD · 2026-07

🇪🇺 Europe · EUR€4,450band €3,700–€8,050

🇺🇸 United StatesNot sold320i N43 was never a US-market car

What that meansNo US band exists to compare. Any car you find there's a private import, parts and specialist knowledge are thinner, and the price says more about import cost than about the market.

US figures are the EU band converted at a stated rate. No US market differential is modelled: we hold no sourced US asking prices, and inventing one would be worse than saying so. What the comparison does show for real is availability. Most of this range was never sold in the US.

ModelBMW 3 Series 320i
ChassisE93
EngineN43
Years2007–2011
MarketCentral EU
Windowrolling 12 months to 2026-07

Good buy at or under the marker · Median asking price · bar spans the 10th to 90th percentile · dashed line is the e93 median, all 11 engines

Good buy isn't the same as cheapest. The good-buy figure assumes the known failure items are either done with receipts or verifiably not yet due. Full breakdown by facelift phase →

Buyer notes

Our judgement, kept separate from the records it's built on.

Our read, not a record

This is the trap of the four-cylinder petrol range. On paper it's the sensible one: 170 PS, no turbo, decent economy, cheap tax. Yet in practice the lean-burn fuel system is fragile, and once injectors start failing they tend to keep going one at a time. Shops know it and quote accordingly. If you find one with all six injectors and the NOx sensors replaced recently, with receipts, it's a genuinely good car and worth paying a premium for. Without that paperwork, assume you're buying the repair bill. The N46 that preceded it and the six-cylinder N52 are both less exposed.

Everything above this line comes from the issue and specification records. This paragraph is our judgement on top of them. See how we reach it.

Full specification

Manufacturer figures for this engine and body, as recorded in the variant and engine data.

Engine code	N43B20
Configuration	I4, naturally aspirated, lean-burn · 1995 cc
Fuel / injection	petrol · direct
Model years	2007–2011
Facelift phase	Sold either side of the 2010 facelift, 2007–2009 pre, 2010–2011 LCI
Power / torque	170 PS · 210 Nm
Transmissions	6-speed manual · 6-speed automatic (ZF)
Gearbox families	Getrag six-speed manual · ZF 6HP19 / 6HP21 six-speed automatic
Drivetrain	RWD
Economy (real-world)	7.5–9 l/100 km mixed
Markets	EU