BMW Serie 3 E90 (2005–2012)Faults with the injectors
Injectors of the BMW Serie 3 E90: problems and faults
In the BMW Serie 3 E90 there are 4 documented faults with the injectors; the most important: N53 piezoelectric injector failure (BMW N52 / N53 engine), blocked and seized injectors (BMW M47 engine) and injector, ignition coil and NOx sensor failures (N43) (BMW N43/N46 engine).
- High severity: N53 piezoelectric injector failure · BMW N52 / N53 engine
- Medium severity: Blocked and seized injectors · BMW M47 engine
- Medium severity: Injector, ignition coil and NOx sensor failures (N43) · BMW N43/N46 engine
- Medium severity: N54 piezoelectric injector failure · BMW N54/N55 engine
Most serious fault: High severity
Faults by engine
From most to least important. Check the affected years and versions on each page.
Symptoms these faults cause
Frequently asked questions
What faults with the injectors does the BMW Serie 3 E90 have?
In the BMW Serie 3 E90 there are 4 documented faults with the injectors; the most important: N53 piezoelectric injector failure (BMW N52 / N53 engine), blocked and seized injectors (BMW M47 engine) and injector, ignition coil and NOx sensor failures (N43) (BMW N43/N46 engine). Each fault has its own page with the affected years and versions, the symptoms and how to check for it.
Which engines of the BMW Serie 3 E90 have faults with the injectors?
The documented faults affect the BMW N52 / N53, BMW M47, BMW N43/N46 and BMW N54/N55 engines. Check the years and versions on each page: they do not always affect every unit.
Have you had a fault with the injectors on your BMW Serie 3 E90? Tell us at what mileage and how much you paid. Report your fault.
Sources
Every fact on this page links to its source. If you find an error, let us know.
- BMW N53 Engine ProblemsBMW Tuning · Other source · consulted 5 October 2026
- Motor BMW M47: problemas y averíasDasercars · Technical documentation · consulted 27 September 2026 · in Spanish
- BMW 3er E46: typische Probleme und SchwachstellenGebrauchtwagenberater · Technical documentation · consulted 27 September 2026 · in German
- BMW N43: Bei diesem Benziner ist Ärger vorprogrammiertGebrauchtwagenberater · Motoring press · consulted 27 September 2026 · in German
- BMW N54 and N55 Turbo Problems: What Goes Wrong and How We Fix ThemForeign Automotive · Technical documentation · consulted 5 October 2026