N52
BMW · 2.5-3.0L NA I6
2004–2015
"Last great NA six. Lighter (magnesium block), smoother, higher-revving than M54. 250k+ km."
Mileage Risk Timeline
When problems typically appear — enter your mileage to see your risk zone
Known Issues 3
Coolant expansion tank / hose failure
▸Coolant warning light, steam, puddle under car
Same plastic cooling vulnerability as M54. Replace preventively.
Recommended at 100k km in Greece. Heat shortens plastic cooling component life.
VANOS solenoid / oil feed failure
▸Rough idle, check engine light, loss of low-end torque, rattle on startup
Electric VANOS solenoids can fail or clog with dirty oil. Often clears with cleaning. Solenoid replacement €80-150 each.
Oil change history critical. Neglected oil causes solenoid clogging.
Hydraulic lifter tick on cold start
▸Ticking first 10-30 sec after cold start, disappears warm
Very common N52 characteristic. Not destructive. Usually dirty oil or long intervals. Resolves with fresh oil.
Less concern in Greek climate — warm starts mean shorter tick duration. Keep oil fresh at 7-8k km.
Models with N52 9
Other BMW Engines
Tuning Potential
N/A — classic engine
Frequently Asked Questions
Is the BMW N52 reliable?
The BMW N52 scores 90/100 with a verdict of BEST. It has 3 documented issues with total repair costs between €250 and €900.
What are the common problems with the N52?
The most common issues are:
- Coolant expansion tank / hose failure — moderate, repair cost €100–€300, 80,000 km–150,000 km
- VANOS solenoid / oil feed failure — moderate, repair cost €150–€400, 80,000 km–160,000 km
- Hydraulic lifter tick on cold start — minor, repair cost €0–€200, 60,000 km–∞
What cars use the BMW N52?
How much does it cost to repair the N52?
Total potential repair costs for all 3 known issues range from €250 to €900. The most expensive issue is typically .
What years was the N52 produced?
The BMW N52 was produced from 2004 to 2015. It is a 2996cc I6 petrol na engine.
Verdict and scores are editorial opinions based on aggregated data. Learn about our methodology. Not a substitute for professional inspection.