Car Model Guide/ BMW/ 1 Series/ E82/ 1M

1M N54

BMW's first modern turbo six. Strong bottom end, huge tuning headroom, and a fuel and boost system that bills you in €800 increments forever.

Overview

The 1M is the N54 petrol version of the BMW 1 Series coupe (E82), sold 2011–2012 with 340 PS and manual_6. Demands diligence at level 3. Mechanically an N54 with the usual fuel and cooling costs, but bought and maintained as a collectible, which changes the risk. 19 failure modes are recorded against its engine, gearbox, chassis and shared components. Prices on this page are illustrative placeholders rather than a sourced market sample. See the methodology for how the bands are derived.

BMW 1 Series coupe (E82) · photo 2008-2010 BMW 125i (E82) coupe 01 by OSX · Public domain · Wikimedia Commons

Power340 PS

Torque450 Nm

Years2011–2012

Fuelpetrol

DriveRWD

EnginesN54

Biggest risks

Ranked by probability × repair cost. 19 recorded in total.

65Solid

Fuel injector failure€1,800–€3,000partly checkable
Turbocharger wastegate rattle and turbo failure€1,200–€3,500checkable
Dual-mass flywheel and clutch wear€900–€1,600checkable

Risk level −22 · Likely spend vs price −13 · all issues →

System by system9 systems reviewed · 1 with no recurring fault reported

EnginewatchOil filter housing gasket leak, €300–€600.

Fuel system⚠ attentionFuel injector failure, €1,800–€3,000.+1 more in this system

Turbo & intake⚠ attentionTurbocharger wastegate rattle and turbo failure, €1,200–€3,500.+2 more in this system

CoolingwatchElectric water pump and thermostat failure, €500–€800.+1 more in this system

Emissions✓ clearNo recurring fault reported for this system on this engine.

Transmission⚠ attentionDual-mass flywheel and clutch wear, €900–€1,600.+1 more in this system

ElectricswatchWater ingress and footwell module damage, €0–€1,200.+3 more in this system

Suspension & brakeswatchFront control arm bushing wear, €300–€700.+3 more in this system

Body & interiorwatchCorrosion at the rear subframe and arch seams, €300–€2,000.

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.

Fuel injector failureN54B30€1,800–€3,000

Rough idle, cold-start stumble, misfire counts on one or two cylinders, occasional fuel smell. Piezo injectors leak or lose spray pattern. BMW revised the design repeatedly. The index number on the injector tells you which generation is fitted.

Check: Scan for per-cylinder misfire counts on a warm engine. It is the only honest check. Ask which injector index is fitted. Assume a car with no injector history will need some.

FuelcommonPartly detectableevidence: manufacturer80–180k km

Turbocharger wastegate rattle and turbo failureN54B30€1,200–€3,500

Metallic rattle on light throttle at low revs, later boost faults, underboost codes and power loss. Wastegate arm bushings wear and the flapper rattles in its seat. The turbos themselves are otherwise reasonably durable.

Check: Listen at cold idle and at light part throttle from 1,500–2,500 rpm. Rattle alone isn't fatal, cars run for years with it, but it should price the car.

Turbo & intakecommonDetectable at viewingevidence: documented120–220k 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

High-pressure fuel pump failureN54B30€700–€1,100

Long crank, extended cranking when warm, limp mode, misfire and hesitation under load. The direct-injection high-pressure pump loses delivery pressure and eventually fails outright. Early pumps went through several revisions.

Check: Insist on a cold start. Scan for fuel-pressure and misfire codes, and ask for a pump receipt with the part number. Revised part numbers appeared from 2010, so check the number rather than the build year.

Later parts: Revised pump part numbers from 2010 onward; not all cars received one.

FuelcommonPartly detectableevidence: manufacturer90–160k 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

Electric water pump and thermostat failureelectric water pump€500–€800

Overheat warning with little notice, coolant temperature swinging, sometimes an immediate limp home. The electric pump's controller fails. It's a wear item with a service life, not a fault.

Check: Age and receipts matter more than symptoms, it usually gives no warning. Treat a car past 120,000 km with no pump history as owing €600.

CoolingcommonPartly detectableevidence: documented90–150k km

Water ingress and footwell module damage1 Series platform€0–€1,200

Damp or soaked front carpets, a musty smell and fogged windows, and, when water reaches the footwell electronics, failed lights, windows or indicators. Most often the bulkhead scuttle drains block by the pollen filter and overflow into the cabin; perished door membranes and tailgate seals can add to it. Water then attacks the footwell module.

Check: Lift the front and rear carpets and press for damp. Check the boot and spare-wheel well for standing water, and confirm the scuttle drains near the pollen filter are clear.

ElectricalcommonDetectable at viewingevidence: documented60–200k km

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 19 issues in full →

Mileage and servicing

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

Provenance and a full BMW-specialist history are the value here; a cheap one is a warning, not a bargain.

Service item	Interval	Cost
High-pressure fuel pump The N54 item, though these cars are usually kept ahead of it	as it fails	€700–1,100
Cooling system Plastic parts remain wear items	roughly 120,000 km	€600–1,200
Provenance check Originality drives value on a collectible	on purchase	cost of an inspection

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 €55.0k

€46.4k€50.7k€73.3k

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€50,700band €46,400–€73,250

🇺🇸 United StatesNot sold1M N54 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 1 Series 1M
ChassisE82
EngineN54
Years2011–2012
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 e82 median, all 9 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

The 1M Coupé is a different car from the rest of the range and a different market: a limited-run, manual-only, wide-arched N54 that has appreciated rather than depreciated. The engine's fuel-system and cooling costs still apply, but these cars are cherished and maintained, so the risk is provenance rather than neglect. So buy on history and originality. Expect to pay a lot, and treat any suspiciously cheap example with deep suspicion.

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	N54B30
Configuration	I6, twin-turbo · 2979 cc
Fuel / injection	petrol · direct
Model years	2011–2012
Facelift phase	Facelift (LCI) only, from 2011
Power / torque	340 PS · 450 Nm
Transmissions	6-speed manual
Gearbox families	Getrag six-speed manual
Drivetrain	RWD
Economy (real-world)	10–12.5 l/100 km mixed
Markets	EU

1M N54

Overview

Known issues, ranked by expected cost

Pre-purchase inspection

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

2Static checksEngine off, ideally on a lift.

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

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

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