Understanding The Top 3 Common BMW S63 and N63 Engine Issues
The BMW S63 and N63 engines are renowned for their impressive power and performance, featuring in high-performance models such as the BMW M5, M6, and X5/X6 M. However, like any advanced engineering marvel, they require diligent maintenance to stay in peak condition. While these engines offer exhilarating driving experiences, owners should be aware of common issues and the importance of timely repairs.
At CG Motorsports, with over 25 years of experience as a BMW specialist, we provide expert diagnostics and repair services to keep your BMW running smoothly.
Overview of the S63 and N63 Engines
Before diving into potential issues, it’s important to understand the differences between these two engines:
N63 Engine: BMW’s first-generation twin-turbocharged V8, introduced in 2008, designed primarily for luxury models, balancing performance and efficiency.
S63 Engine: A high-performance evolution of the N63, featured in BMW’s M models, offering enhanced power output and dynamic driving capabilities.
Despite their differences, both engines share similar components and technologies, which means they also share some common maintenance concerns.
Top 3 BMW S63 & N63 Engine Issues
1. Oil Consumption & Leaks
One of the most well-documented issues with the N63 and S63 engines is excessive oil consumption. BMW owners have reported frequent low oil warnings, requiring regular top-ups between scheduled oil changes. This is often linked to oil leaks from:
- Valve cover gaskets
- Oil filter housing gaskets
- Oil pan gaskets
Unchecked oil leaks can lead to low oil levels, increasing the risk of engine damage. If left unresolved, this can cause excessive wear on internal components, leading to costly repairs. Regular inspections and proactive maintenance help prevent serious damage.
2. Turbocharger Failures
Twin-turbo technology enhances performance, but it also introduces additional stress on the engine. Turbocharger failures are a common concern for these engines and can be identified by:
- Excessive exhaust smoke (especially blue or white smoke)
- Whining or unusual noises during acceleration
- Loss of power and hesitation under acceleration
Turbo failures are often caused by oil starvation, excessive heat, or worn-out bearings. Replacing failed turbos can be costly, so catching symptoms early through routine inspections is crucial.
3. Carbon Buildup & Valve Issues
The direct fuel injection system used in the N63 and S63 engines contributes to carbon buildup on intake valves, leading to:
- Rough idling and misfires
- Poor throttle response
- High oil consumption and smoking
- Check engine light warnings
Over time, this buildup can lead to significant internal wear, including cylinder scoring. Walnut blasting is a common solution to remove carbon deposits and restore performance. At CG Motorsports, we specialize in carbon cleaning services to prevent long-term damage.
Which BMW Models Use the N63 & S63 Engines?
Here is a list of BMW models equipped with these engines:
N63 Engine (First-Generation, 2008-Present)
- BMW 550i (2009-2017)
- BMW 650i (2011-2018)
- BMW 750i (2009-Present)
- BMW X5 xDrive50i (2010-Present)
- BMW X6 xDrive50i (2010-Present)
S63 Engine (High-Performance M Models)
- BMW M5 (F10: 2011-2016, F90: 2017-Present)
- BMW M6 (F12/F13: 2012-2018)
- BMW X5 M (E70: 2010-2013, F85: 2015-2018, F95: 2020-Present)
- BMW X6 M (E71: 2010-2013, F86: 2015-2018, F96: 2020-Present)
Trust CG Motorsports to Resolve Common BMW Engine Issues
The BMW S63 and N63 engines deliver outstanding performance, but like any high-performance powertrain, they require proper care. Regular maintenance and expert repairs can help prevent major issues, ensuring long-term reliability. If you own a BMW with one of these engines, CG Motorsports’ team of specialists is here to provide the expertise you need.
Contact us today to schedule a service appointment and keep your BMW running at its best.
