What Goes Wrong on Your BMW Depends on Which Engine Is In It

Two BMWs in the same pickup line at Crabapple can wear the same badge and share almost nothing underneath it. One is an N20 four with a chain that stretches. The other is a B58 six that will run past 200,000 miles as long as coolant stays in it. Same roundel. Different failure list, different money. We have worked on German cars out of one building on Commerce Blvd since 2003, and the fastest way to sort out an F30 or an X3 is to start with the engine code.

Quick Takeaways

  • N20 and N26 chains stretch: the plastic guides go brittle and the rattle starts before 90,000 miles.
  • N54 and N55 wear their fuel and boost hardware: fuel pump, coded injectors, wastegate rattle.
  • The B58 is the durable one: it still needs cooling service and an oil filter housing gasket.
  • A burning smell with no puddle is oil dripping onto a hot exhaust manifold.
  • 5630 Commerce Blvd, Alpharetta, GA 30004. Monday through Friday, 8:00 AM to 5:30 PM. Closed weekends.

OUR SERVICES

N20 and N26 Timing Chains Stretch Before 90,000 Miles
The N54 and N55 Wear Out Their Fuel and Boost Hardware
The B58 Is the Reliable One and Still Needs Its Cooling
A Burning Smell in the Driveway Is Oil on the Exhaust Manifold
Electric Water Pumps and Thermostats Fail Without Warning
SOLO MOTORSPORTS RECEIVED

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Frequently Asked Questions

How do I know if my BMW timing chain is stretched?
Why does my BMW crank a long time before it starts?
Is the BMW B58 engine actually reliable?
My BMW smells like burning oil but there is no leak on the driveway. Why?
Do you service BMWs near Milton and Crabapple?

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