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N53B25

N53B25 2.5 (2007-2010) engine: faults and reliability

BMW N52 and N53 (seis cilindros atmosférico) version

With caution

Shares the N53's piezoelectric direct injection system, whose injector failures are widespread; better with an injector history.[1][2]

Years
2007–2010
Power
188 hp
Faults that affect it
3
1 of high or critical severity
Cars that use it
1
in our database

5 sourcesHow we work

What changes in this version

2.5-litre variant of the N53, with piezoelectric direct injection and no Valvetronic; 188 hp according to Wikipedia.[3]

Engine codes of this version: N53B25.

Faults of the N53B25 engine

The documented engine faults that affect this version and its years, from most to least important.

  1. 1High severityFrequency: CommonInjectionN53 piezoelectric injector failureThe N53's piezoelectric direct injectors fail frequently and cause misfires, rough idle and limp mode; replacing them is expensive and they must be coded.
  2. 2Medium severityFrequency: CommonLubricationOil leak from the oil filter housing gasketThe oil filter housing gasket hardens over time and leaks oil on all N52 engines; the leak can soil the engine and damage nearby parts.
  3. 3Low severityFrequency: OccasionalIgnitionN53 ignition coils from 2007-2008 (BMW service action)BMW replaced the coils of 2007-2008 N53 and N43 engines free of charge, because they could fail early through temperature and insulation problems and cause misfires. Autobild describes it as an issue not related to safety.

Cars fitted with the N53B25 engine

Open each car to see all its faults with this engine and what to check before buying it.

BMW

Frequently asked questions

Is the N53B25 engine reliable?

Our verdict is “With caution”. Shares the N53's piezoelectric direct injection system, whose injector failures are widespread; better with an injector history.[1][2]

What faults does the N53B25 engine have?

The documented ones that affect this version, by importance: n53 piezoelectric injector failure (high severity), oil leak from the oil filter housing gasket (medium severity) and n53 ignition coils from 2007-2008 (BMW service action) (low severity).

Which cars use the N53B25 engine?

BMW Serie 3 E90 (2005–2012).[3][4][5]

Are you buying a car with the N53B25 engine?

We will put you in touch with a partner only if you authorise it in the form.

Do you have a car with this engine? Tell us which faults you have had and at how many kilometres. Report your fault.

Sources

Every fact on this page links to its source. If you find an error, let us know.

  1. Der BMW N53 Motor: Technische Daten, Probleme, Haltbarkeit & FahrzeuglisteCarWiki · Technical documentation · consulted 5 October 2026 · in German
  2. BMW N52 and N53 24 Valve Six Cylinder EnginesUnixnerd · Technical documentation · consulted 5 October 2026
  3. BMW N53Wikipedia · Other source · consulted 5 October 2026
  4. BMW N52 Engine ProblemsBMW Tuning · Other source · consulted 5 October 2026
  5. BMW N52Wikipedia · Other source · consulted 5 October 2026