Car Model Guide/ BMW/ 3 Series/ F31/ 328i

328i N20

BMW's turbocharged four in the 320i and 328i, quick and economical for its output. Early engines used timing chain guides that could break, and the failure takes the engine, so the build date and any chain work decide the purchase.

Overview

The 328i is the N20 petrol version of the BMW 3 Series wagon (F31), sold 2012–2015 with 245 PS and manual or automatic. High risk at level 4. Early N20 chain guides can break, and the chain failure that follows destroys the engine. 6 failure modes are recorded against its engine, gearbox, chassis and shared components, one of which is a walk-away item without documented proof. Prices on this page are illustrative placeholders rather than a sourced market sample. See the methodology for how the bands are derived.

BMW 3 Series wagon (F31) · photo BMW F31 3 Series Touring Mineral Grey Metallic (1) by Damian B Oh · CC BY-SA 4.0 · Wikimedia Commons

Power245 PS

Torque350 Nm

Years2012–2015

Fuelpetrol

DriveRWD / xDrive

EnginesN20

Biggest risks

Ranked by probability × repair cost. 6 recorded in total.

29High risk

Timing chain guide failure (early N20)€1,400–€6,000partly checkablewalk away
Dual-mass flywheel and clutch wear€900–€1,600checkable
Carbon buildup on intake valves€400–€700not checkable

Risk level −33 · Walk-away failures −12 · Likely spend vs price −26 · all issues →

System by system9 systems reviewed · 4 with no recurring fault reported

Engine⚠ attentionTiming chain guide failure (early N20), €1,400–€6,000. Walk away without proof.+1 more in this system

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

Intake & airwatchCarbon buildup on intake valves, €400–€700.

CoolingwatchElectric water pump and thermostat failure, €500–€800.

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

Transmission⚠ attentionDual-mass flywheel and clutch wear, €900–€1,600.

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

Suspension & brakeswatchRear air spring leak, €300–€1,200.

Body & interior✓ clearNo recurring fault reported for this system on this engine.

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	2012–2014	€9,550	€13,800	€20,150	€11,700	The specification the car launched with.
LCI Facelift (LCI)	2015	€10,400	€15,000	€21,950	€12,700	B47 and B48 engines replaced N47 and N20; Revised lights and bumpers; Updated iDrive and interior trim

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.

Timing chain guide failure (early N20)N20B20 2.0 turbo€1,400–€6,000

A whine or rattle from the front of the engine, worst at a cold start, and eventually a timing fault code or a sudden loss of power. Early N20 engines used chain guides made of a plastic that could become brittle and crack. Once a guide breaks the chain loses control, and if it jumps or snaps the valves meet the pistons. BMW revised the guides, so the parts fitted decide the risk.

Check: Start the car from stone cold and listen for a whine or rattle from the front of the engine. Ask for receipts showing the chain and guides replaced with the revised parts, and treat an early car with no paperwork as carrying the full cost.

Later parts: Revised chain guides from later production, and fitted as a retrofit, so it applies to cars built up to 2015.

EnginecommonPartly detectablewalk away without proofevidence: documented60–150k 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

Rear air spring leakF31 body€300–€1,200

The rear of the car sitting low after standing, a suspension warning, or a compressor that runs for longer than it should. The Touring's self-levelling rear suspension uses air springs, and their rubber bags perish and crack with age. A leaking spring then makes the compressor work harder until it fails as well.

Check: Look at the car cold and before it's been started, and check that it sits level. Then load the boot and watch it lift back to height, listening for the compressor running on.

SuspensioncommonDetectable at viewingevidence: documented90–180k 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

Oil filter housing gasket leakoil filter housing€300–€600

Oil pooling on the subframe, oil on the serpentine belt, drips on the driveway. The gasket between the filter housing and the block fails. Oil then lands on the belt, and a belt that shreds can be drawn into the front crank seal.

Check: Put the car on a lift. Check the belt itself for oil contamination. An oily belt is the version of this fault that ends badly.

EnginecommonDetectable at viewingevidence: documented90–170k 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.

Pre-purchase inspection

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

6 checks · saved in this browser ·

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

Timing chain guide failure (early N20)walk away without proofStart the car from stone cold and listen for a whine or rattle from the front of the engine. Ask for receipts showing the chain and guides replaced with the revised parts, and treat an early car with no paperwork as carrying the full cost.

2Static checksEngine off, ideally on a lift.

Rear air spring leakLook at the car cold and before it's been started, and check that it sits level. Then load the boot and watch it lift back to height, listening for the compressor running on.Oil filter housing gasket leakPut the car on a lift. Check the belt itself for oil contamination. An oily belt is the version of this fault that ends badly.

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

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.

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.Electric water pump and thermostat failureAge 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.

Mileage and servicing

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

The guide failure depends on which parts are fitted rather than on mileage, so the build date and receipts outrank the odometer. A car with documented chain work is worth a clear premium.

Service item	Interval	Cost
Engine oil and filter Chain guide wear accelerates on tired oil and long intervals.	15,000 km or annually	€130–190
Timing chain and guides Early guides break and the engine follows.	revised parts, or on symptoms	€1,400–2,400

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 €14.4k

€9.6k€11.7k€21.9k

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€11,700band €9,550–€21,950

🇺🇸 United StatesNot sold328i N20 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 328i
ChassisF31
EngineN20
Years2012–2015
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 f31 median, all 5 engines

Good buy isn't the same as cheapest. Any car without documentation for timing chain guide failure (early n20) should be priced as if the repair is still owed. Full breakdown by facelift phase →

Buyer notes

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

Our read, not a record

The N20 is a strong, economical turbo four that makes the 328i genuinely quick. Its early timing chain guides were made of a plastic that could crack, and once a guide breaks the chain can jump and wreck the engine. Start it from stone cold and listen for a whine or rattle from the front, then ask whether the chain and guides have been replaced with the revised parts. So check the electric water pump and the oil filter housing gasket as well, since both are routine BMW costs of this era.

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	N20B20 2.0 turbo
Configuration	I4, turbocharged · 1997 cc
Fuel / injection	petrol · direct
Model years	2012–2015
Facelift phase	Sold either side of the 2015 facelift, 2012–2014 pre, 2015 LCI
Power / torque	245 PS · 350 Nm
Transmissions	6-speed manual · 8-speed automatic (ZF)
Gearbox families	Getrag six-speed manual · ZF 8HP eight-speed automatic
Drivetrain	RWD · xDrive
Economy (real-world)	6.5–8 l/100 km mixed
Markets	EU