Are you a BMW enthusiast or owner, especially of a high-performance model like the BMW M3 or M4? If so, you may have heard whispers about the infamous “crank hub issue” on the BMW S55 engine. This issue can be daunting, but with the right knowledge and care, it’s manageable. Here at EurAuto Shop in Plano, TX, we’ve seen firsthand how addressing the BMW S55 crank hub issue with precision and care can make a big difference for our clients’ vehicles. Here’s everything you need to know!
What Is the BMW S55 Crank Hub Issue?
The S55 engine crank hub problem affects BMW’s high-performance models, particularly the BMW M3 and M4. Here’s the issue in a nutshell:
- What It Is: The crank hub connects the crankshaft to key components like the timing gears. In the S55 engine, this hub can slip or spin, causing severe timing disruptions.
- Why It Matters: A slipping crank hub throws off engine timing, leading to misfires, power loss, and, if unaddressed, potentially severe engine damage.

This problem mainly impacts BMW M models that excel in performance but require meticulous care. For BMW enthusiasts, our BMW crank hub upgrade offers both peace of mind and a lasting fix.
Crank Hub Design Flaws and Mod Stress: Why Failure Happens
- Design Weakness in the S55 Engine: The S55’s single-bolt crank hub is prone to slippage under high loads, especially during spirited driving, which may cause timing issues. Our EurAuto Shop team has vast experience fixing this weakness to withstand high-performance BMW engine reliability.
- When Modifications Exacerbate the Issue: BMW owners often add aftermarket mods like exhausts, charge pipes, or downpipes, common with BMW M3 and M4. While these mods increase performance, they also add stress to the crank hub. This is where a BMW crank hub upgrade can ensure long-term reliability.
Signs of Crank Hub Failure: Protect Your BMW Before It’s Too Late
If you drive a BMW M3 or M4, watch for these symptoms of S55 engine crank hub issues:
- Engine Misfires or Rough Idling: Timing issues due to a slipping crank hub often cause misfires.
- Loss of Power: Reduced performance can signal crank hub slippage.
- Check Engine Light: Timing irregularities typically trigger this light.
- Odd Engine Noises: Listen for rattling or knocking sounds from the engine.
If you notice any of these symptoms, it might be time for a checkup. At EurAuto Shop, our expert team is well-versed in crank hub repair for BMW M3 and M4 models and can quickly diagnose and resolve the issue.
Fixing the BMW S55 Crank Hub Issue: What Are Your Options?
The EurAuto Shop Crank Hub Process – What We Do Differently
Our approach to BMW S55 crank hub fix is all about precision and protection. Here’s a quick look at how we protect your vehicle during the process:
- Vehicle Protection: We “crash wrap” the entire vehicle to prevent any debris or scratches, ensuring it leaves our shop in pristine condition.
- Advanced Part Replacement: Our team replaces not only the crank hub but also installs new, top-tier downpipes, cold air intake, and charge pipes, optimizing performance and reliability.
In terms of BMW crank hub upgrades, here’s why our process stands out:
- New Pinning System: The updated crank hub we use is a single, strong unit, pinned in four places: the oil pump, sprocket, timing chain sprocket, and the hub itself. This advanced, reinforced hub design significantly reduces the risk of crank hub slippage.
- Upgraded Components: Our replacements include only the best parts, ensuring durability and long-term reliability. By upgrading these core components, we future-proof your BMW against common performance issues associated with the stock crank hub design.
Why Choose a Crank Hub Upgrade Over Repair?
We generally recommend a BMW M3 S55 crank hub replacement over a simple repair. Here’s why:
- Enhanced Reliability: Our upgraded crank hub solution is designed to withstand high torque, especially for those who push their BMW M3 or M4 to the limits.
- Long-Term Savings: Avoid recurring repairs and potential engine damage by opting for a robust crank hub solution.
- Performance Confidence: With the pinned hub design, you can drive with the confidence that your engine timing is safe from BMW S55 crank hub failure.
Secure Your BMW S55 Crank Hub Fix with EurAuto Shop in Plano, TX
At EurAuto Shop, our skilled technicians have a deep understanding of the BMW S55 crank hub issue. We prioritize quality, transparency, and treating every client like family. With a comprehensive 5-year/50,000-mile warranty, you can trust our work to deliver lasting reliability and peace of mind.
Ready to ensure your BMW’s performance endures? Schedule your appointment at eurautoshop.com, or call us at 214-552-4194. Visit us at 4008 W. Plano Pkwy, Plano, TX 75093.