Accessory Drive Belt Replacement Guide for the 2012-2016 BMW M5 (F10)
Keep your M5's high-performance S63 engine running strong by understanding its accessory drive belt.
- Proactively replace the belt every 60,000-90,000 miles to avoid being stranded.
- Fix any engine oil leaks before installing a new belt, as oil contamination is a primary cause of failure on the S63 engine.
- For OEM quality without the dealer price, choose a Continental belt; Bando is a reliable, cost-effective alternative.
- For a complete and lasting repair, replace the belt tensioner and idler pulleys at the same time as the belt.
Is Your M5's Accessory Belt Failing?
The accessory belt on your M5's S63 engine works under intense heat and tension. Over time, the rubber will crack and wear out. Ignoring the warning signs can leave you stranded and risk severe engine damage. Watch for these symptoms:
- Squealing or Chirping Noises: A high-pitched squeal from the engine, especially when starting up or accelerating, is a classic sign of a worn or slipping belt.
- Visible Wear: Look at the belt. If you see cracks, frayed edges, missing ribs, or a shiny, glazed surface, it's time for a replacement.
- Accessory Problems: If your headlights dim, a battery warning light appears, or the engine temperature starts to rise, the belt may be failing to power the alternator and water pump correctly.
Critical Failure Warning: Oil Leaks
A very common issue on the S63 engine is oil leaking from the valve covers or front crankshaft seal. This oil drips onto the accessory belt, causing the rubber to soften, swell, and fail suddenly. Before installing a new belt, it is essential to find and fix any oil leaks. A snapped belt on these engines can sometimes get pulled into the front crankshaft seal, which can cause catastrophic engine failure.
Choosing the Right Aftermarket Belt
You don't need to buy a part in a BMW box to get top quality. For many parts, the company that makes it for BMW also sells it under their own name for less money.
- OEM-Tier (Best Quality): The original belt for your M5 is made by Continental (often sold as ContiTech). Buying a Continental belt gives you the exact same quality as the dealer part, just in a different box. This is the smartest choice for guaranteed fit and durability.
- Quality Aftermarket (Good Value): Brands like Bando are known to be Original Equipment suppliers for many Japanese carmakers and have a good reputation for quality. Forum users report positive experiences, making Bando a reliable and budget-friendly option.
Replace More Than Just the Belt
A belt often fails because of a worn-out tensioner or idler pulley. To make sure your new belt lasts, it is highly recommended to replace the belt, the tensioner, and the idler pulleys all at the same time as a kit.
Cost of Replacing the Accessory Drive Belt
| Part Type | Estimated Cost |
|---|---|
| New OEM (Genuine BMW) | $50 - $75 |
| New Aftermarket (Bando/Continental) | $30 - $50 |
| Shop Labor | $150 - $250 |
Frequently Asked Questions (FAQ)
How often should I replace my M5's accessory drive belt?
While BMW doesn't list an official replacement schedule, experienced mechanics recommend inspecting the belt after 50,000 miles. For peace of mind, you should plan to replace it every 60,000 to 90,000 miles, even if it looks okay.
Is an aftermarket belt good enough for my M5?
Yes, as long as you choose a quality brand. An aftermarket belt from an OEM supplier like Continental is identical to the genuine BMW part. A reputable brand like Bando is also a solid choice that can offer significant savings without sacrificing reliability.
Can I replace the accessory belt myself?
For an experienced DIY mechanic, this is a manageable job. You will need to remove the cooling fan and some covers to get access. A special T60 Torx bit is required to release the belt tensioner. If you are not comfortable with this, a professional mechanic can do the job in about 1-2 hours.
Are there any recalls for the M5 accessory belt?
No, there are no recalls or technical service bulletins (TSBs) from BMW for the accessory drive belt on the 2012-2016 M5. Failures are considered normal wear and tear, often accelerated by oil leaks.
Technical Specifications
OEM Part Numbers: 11287849972 11287598833
The F10 M5 uses a main serpentine belt for the alternator and water pump, and a separate stretch belt for the A/C compressor. The main belt is a multi-rib design.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- BMW M5: