Your BMW's serpentine (drive) belt runs the alternator, water pump, and accessories. When it ages and cracks it can squeal — and on some BMWs a failed belt can be drawn into the front crank seal, causing major damage. At Inline Autohaus in Chattanooga, we replace worn belts before that happens.
Drive belts and their tensioners wear with age and heat, and a neglected belt can break. On certain BMW engines, a failed belt can be drawn behind the crankshaft seal and into the engine, so replacing it on schedule prevents an expensive failure.
How often should a BMW drive belt be replaced?
Often somewhere around 60,000–100,000 miles, or sooner if cracked or squealing.
Why is a failed BMW belt so serious?
On some engines it can be pulled into the front crank seal and into the engine, causing major damage — so don't delay replacement.
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