KNOWN FAULTS · BMW

BMW Serie 1 (E81/E82/E87/E88) 1 M Coupé (N54, 3.0) common problems.

2004–2011 · Petrol

Sources are not verified in real time and no entry confirms that your car is affected.

3 known faults with sources

N54 high-pressure pump, wastegates and injectorsInjection / turbo

Engine / equipment: N54 3.0 twin-turbo (135i E82/E88, 335i E90-E93 until 2010, 535i, 1 M Coupé, Z4 35i)
Period mentioned: 2006–2013
Symptoms: Long cranking, hesitation, engine light and limp mode (high-pressure pump); metallic rattle at idle or between 1,500 and 3,000 rpm and low boost (wastegates); misfires from injectors.
Possible cause described: Faulty high-pressure fuel pump (BMW extended its US warranty to 10 years or 120,000 miles for 2007–2010), worn turbo wastegate bushings and piezo injectors with many revisions.
Check for the garage: Read fuel pressure and boost codes, listen at idle and confirm by VIN that the revised pump is fitted.
Cost cited in the source: High-pressure pump: approx. €500–1,000 (estimate); two turbos for the wastegates: the most expensive repairA rough figure from the original database, not an up-to-date quote.

BMW petrol electric water pump, leaks and VANOSCooling / leaks / VANOS

Engine / equipment: BMW petrol engines with an electric water pump: N52, N53, N54, N55, N20 and others from 2004–2016
Period mentioned: 2004–2016
Symptoms: Temperature warning and limited power with no prior warning (water pump); burning oil smell or smoke from leaks onto the exhaust or belt; rough idle and VANOS codes (2A82, 2A87).
Possible cause described: The water pump is electric and its electronics fail, often without warning, between 95,000 and 160,000 km. The valve cover and oil filter housing gaskets harden and leak; the latter can drip onto the belt. The VANOS solenoids get dirty and fail.
Check for the garage: Check the water pump and thermostat history, look for leaks at the valve cover and oil filter housing, and read VANOS codes.
Cost cited in the source: Water pump: approx. €550–1,100 fitted; oil filter housing gasket: €275–550; valve cover: €370–740 (converted from dollars)A rough figure from the original database, not an up-to-date quote.

Mileage cited in the database: 95,000–160,000 km. This is not a maintenance interval and does not predict a failure.

Corrupted FRM3 module (lights and windows)Electrical and electronic systems

Engine / equipment: FRM3 footwell module (lights, indicators and windows): 1 Series E81 to E88, 3 Series E90 to E93, X1 E84, Z4 E89, X5 E70, X6 E71 and E72 and MINI R55 to R61
Period mentioned: 2004–2015
Symptoms: After a flat battery, a battery change or disconnection, or a jump start: lights, indicators or windows stop working, side or dipped lights stay on and diagnostics cannot communicate with the module (for example code 00A3C1).
Possible cause described: The module's EEPROM gets corrupted by low or unstable voltage: a flat battery, jump starting, overcharging from a faulty alternator or loose terminals. It is a module software fault, not a wiring fault.
Check for the garage: Check the battery and charging and try communicating with ISTA. If the module does not respond, it can be repaired by rewriting its EEPROM (specialist services or programmers) instead of being replaced, then coded. Use a voltage maintainer when working on the car.
Cost cited in the source: Repair by a specialist service: from about €20–60 plus postage; new module with dealer coding: considerably moreA rough figure from the original database, not an up-to-date quote.