The engine shows moderate reliability with a risk score of 6.5 out of 10. Valvetronic components are the main recurring concern, typically leading to drivability issues rather than catastrophic failures. With consistent maintenance, these engines can still deliver dependable service.
BMW N46
N46 Engine
The N46 is a petrol engine manufactured by BMW. It has a displacement of 2.0 liters and was produced from 2004 to 2013.
Typical Use Cases
- BMW 1 Series (E87): 2004–2013
- BMW 3 Series (E90/E91): 2005–2012
- BMW X1 (E84): 2009–2013
- BMW Z4 (E85/E89): 2005–2011
This overview summarizes the reliability of the BMW N46, including common issues and cost drivers.
Technical Specifications
Manufacturer
BMW
Fuel Type
Petrol
Displacement
2.0 L
Production
2004–2013
Power Output
116 hp
Emissions
Euro 4, Euro 5
Reliability Analysis
Caution
Autoscore Verdict
Caution. The risk score of 6.5 reflects moderate risk mainly tied to Valvetronic failures.
Risk Score
6.5
out of 10
Common Problems & Weak Points
| Issue | Typical Mileage | Repair Cost (Est.) | Severity |
|---|---|---|---|
| Valvetronic Sensor Failures | ~100,000 km | €450 – €900 | Medium |
Valvetronic Sensor Failures
The N46 uses BMW's Valvetronic system, which can develop faults in the eccentric shaft sensor or motor. When this happens, the engine may idle roughly, lose power, or show warning lights. This is a medium-probability issue typically appearing around 100,000 km. Repairs usually cost 450 to 900 EUR depending on parts and labor.
Typical Mileage: 100,000 km
Cost: €450–900
Buyer's Inspection Checklist
- Listen for rough idle or fluctuating RPM, which can indicate Valvetronic faults.
- Check for warning lights or stored fault codes related to eccentric shaft sensor errors.
- Ask for service records confirming Valvetronic repairs or sensor replacements.
- Ensure smooth acceleration throughout the rev range during a test drive.
Frequently Asked Questions
Is the N46 engine reliable?
The N46 has known weak points, but with good maintenance the reliability is solid. See the risk analysis and common problems for specifics. Start a report for a specific car.
How expensive are typical repairs?
Common repairs fall into a mid-range cost band depending on the issue and workshop. Check the cost ranges in the table. Use the used car report for specific listings.
Which model years are best for this engine?
Newer production years often include technical updates. Review the production years and revisions in the specs. Use Car Check for quick screening.