Family
N52
Strength: Good torque at any RPM. Common watch-out: Many problems in early engines. OEM life note: not limited; often cited in practice: 200,000 km. This family appears across roughly 46 fitment bands in 2004–2015; service history, oil/cooling records, and engine-code verification matter.
N52
N52B25, N52B25A, N52B30, N52B30A, N52B30M1
Verify on the car report
2004–2015
Most frequent / serious themes first; amber labels mark year gates.
This engine has an alusil coating instead of cast iron liners and is demanding on fuel quality, plus there is no external fuel filter, so scoring and oil consumption are common. Early 2.5L engines had thin piston rings that quickly stuck.
The variable valve timing systems are sensitive to oil change intervals. Valvetronic malfunctions often lead to camshaft journal wear, and Vanos phasers wear out quickly when their valve filters become clogged.
This engine is very afraid of overheating and the cooling system must be monitored. High temperatures destroy gaskets and cause severe oil leaks, especially from the valve cover, oil filter housing with heat exchanger, and oil pan.
The chain itself lasts quite long and is replaced around 200-250 thousand km, but the plastic guides can break and fall into the oil pan much earlier. Their fragments then clog the oil pickup, which can lead to engine failure.
Many problems are also caused by the short-lived CCV membrane, vacuum pump, electric water pump, ignition coils, and oil pump valve. Additionally, the plastic flaps of the DISA system can break off and fall directly into the cylinders.
| Rated life (OEM) | not limited |
|---|---|
| Life in practice | 200,000 km |
| Timing drive | chain |
| Timing failure effect | bends valves |
| Oil change interval | every 10,000 km |
| Oil capacity (engine) | 7.0 L |
| Oil capacity (change) | около 6.5 L |
| Oil specification | 5W-30, 5W-40 |
| Valve adjustment | not required |
| Valve adjustment method | hydraulic lifters |
| Oil filter | 10,000 km |
| Air filter | 20,000 km |
| Fuel filter | n/a |
| Spark plugs | 30,000 km |
| Accessory belt | 80,000 km |
| Coolant | 3 years or 60,000 km |
Verified fitments; each row links to the related car report.
N52, kaynaklarda öne çıkan Good torque at any RPM ile anılan bir motor ailesidir; Many problems in early engines dikkat edilmesi gereken nokta.
Engine pros, cons, and issue notes are compiled from OEM service notes and independent expert assessments. Fitments come from verified application records; thin families are not published.