The 2014 to 2018 BMW M3 is known as the F80, and it brought some massive changes to this popular BMW model. Powered by the S55 twin-turbocharged inline-six engine, this generation offers impressive performance and a ton of luxury and tech features. However, like any high-performance vehicle, there are common issues on the BMW M3 F80 to be aware of. Below, we’ll explore some of the issues most frequently reported by F80 owners and mechanics, along with tips for keeping your M3 in optimal shape.
Crank Hub Spinning or Slipping
One of the most notable and discussed issues with the S55 engine involves the crank hub design. Under aggressive driving conditions, there’s a risk that the crank hub can spin or slip if it becomes loose, which subsequently throws off engine timing.
Prevention and Fix
- Regular Inspection: If you regularly track or aggressively drive your M3, consider periodic crank hub checks to catch and issues early.
- Performance Upgrades: Many owners choose to run an upgraded crank hub. This involves installing a specially modified hub or keyway to lock it more securely.
Rod Bearing Wear
While the S55 bottom end is generally reliable, rod bearing wear can still be an issue, particularly with extended high-rpm use or poor maintenance intervals. Excessive wear can eventually lead to engine failure.
Prevention and Fix
- Frequent Oil Changes: Stick to high-quality synthetic oil and change it at shorter intervals than the factory schedule if you drive aggressively (such as every 5,000 miles).
- Oil Analysis: Periodic used-oil analysis (UOA) can help detect metal particles early.
- Bearing Replacement: Some owners opt for preventative rod bearing replacement, especially for tracked vehicles.
Turbocharger Issues
The S55 engine’s twin turbos and related cooling components (including the intercooler, charge pipes, and coolant lines) are under significant pressure. Charge pipes (especially plastic OEM units in early production) can crack under high boost or in extreme temperatures.
Prevention and Fix
- Cooling System Checks: Keep an eye on coolant levels and ensure your radiator and intercoolers remain unobstructed by debris. Periodically check hoses for leaks, too.
- Regular Service: Following recommended turbo inspection intervals and promptly addressing any boost or CEL warnings can prevent major failures.
- Upgraded Charge Pipes: Many owners replace the factory plastic charge pipes with aluminum aftermarket versions to reduce the likelihood of cracking.
Transmission Issues
The F80 M3 was offered with either a 7-speed Dual-Clutch Transmission (DCT) or a 6-speed manual. Both are generally strong, but aggressive shifting and track use can lead to accelerated wear, overheated fluid, and poor shifts.
Prevention and Fix
- Fluid and Filter Changes: Many owners and shops recommend fluid and filter services every 30k–40k miles, especially with track usage.
- Clutch Upgrades Manual: If you frequently launch the car or have increased power, an upgraded clutch kit can improve longevity.
- Transmission Cooling: On track builds, some owners add additional cooling solutions or upgrade the transmission cooler to prevent overheating issues.
Driveshaft Recalls
Certain model years of the F80 M3 were subject to BMW recalls for potential driveshaft defects, leading to sudden failure or excessive drivetrain vibrations. You should check with BMW if you specific car was effected, as this could be a serious concern especially if you track your M3.
Maintenance Tips for the BMW M3 (F80)
- Frequent Oil Changes: Following BMW’s service intervals can help mitigate engine wear, so regular oil and filter changes are essential.
- Track vs. Street Usage: If you track your M3, plan on more frequent inspections of brakes, fluids, tires, and suspension components.
- Pay Attention to Unusual Sounds or Vibrations: Early detection of clunks, squeaks, or vibrations can prevent minor issues from becoming major repairs.
- Stay Updated on Recalls: BMW issues recalls from time to time. Keep your VIN registered with BMW to receive notifications and address them promptly.
Mobile Service for Your BMW M3 F80
The BMW M3 is one of the most exciting performance vehicles ever built, and the F80 generation is no exception. Despite a number of common issues on the BMW M3 F80, it is one of the most capable and respected vehicles in its class. Regardless, if you come to experience any of these issues, AutoNation Mobile Service is standing by ready to assist. With our mobile team of expert mechanics, we can solve almost any vehicle issue from the comfort of your own home or garage.
Whether you are in need of a repair, or want to stay on top of maintenance for your BMW M3, AutoNation Mobile Service is here for you. All you need to do is schedule a mobile service appointment and well bring the BMW repair shop directly to you, saving you precious time and allowing you to go about your day uninterrupted.