The engine shows poor reliability with a risk score of 8.5 out of 10. High heat and oil system stresses create persistent issues, and repairs are expensive. Buyers should expect higher ownership costs and frequent maintenance.
BMW N63
N63 Engine
The N63 is a petrol engine manufactured by BMW. It has a displacement of 4.4 liters. Production started in 2008 and is ongoing.
Typical Use Cases
- BMW 5 Series (F10 550i): 2010–2017
- BMW 6 Series (F12/F13 650i): 2011–2018
- BMW 7 Series (F01 750i): 2008–2015
- BMW X5 (E70/F15 50i): 2009–2018
- BMW X6 (E71/F16 50i): 2008–2019
This overview summarizes the reliability of the BMW N63, including common issues and cost drivers.
Technical Specifications
Manufacturer
BMW
Fuel Type
Petrol
Displacement
4.4 L
Production
2008–Present
Power Output
407 hp
Emissions
Euro 4, Euro 5, Euro 6
Reliability Analysis
Avoid
Autoscore Verdict
Avoid. The risk score of 8.5 indicates significant and costly issues, especially oil consumption.
Risk Score
8.5
out of 10
Common Problems & Weak Points
| Issue | Typical Mileage | Repair Cost (Est.) | Severity |
|---|---|---|---|
| Excessive Oil Consumption | ~90,000 km | €2500 – €5000 | High |
Excessive Oil Consumption
The N63 is known for excessive oil consumption, often due to valve stem seal wear and high turbo heat. This can lead to blue smoke, fouled plugs, and expensive repairs. It is a high-probability issue that typically appears around 90,000 km. Repair costs usually range from 2,500 to 5,000 EUR, making this a high-severity concern.
Typical Mileage: 90,000 km
Cost: €2500–5000
Buyer's Inspection Checklist
- Ask about oil consumption history and whether valve stem seals have been replaced.
- Check for blue smoke during acceleration or after idling.
- Review service records for turbocharger or cooling system repairs.
- Inspect for frequent oil top-ups noted in maintenance logs.
Frequently Asked Questions
Is the N63 engine reliable?
The N63 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.