N54 high-pressure pump, wastegates and injectors

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.

Sources from the original database