BMW · Cooling

BMW M54 Radiator Fan Switch Replacement

I'm replacing the radiator fan switch on an M54-powered BMW Z4 after problems involving the cooling fan. The video is about that switch and the car's cooling-system symptoms. If your Z4 is overheating or its fan won't behave normally, this gives you one real repair to compare against your own diagnosis.

Z4 (M54)Feb 5, 202237,890 views
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What you’ll see in this one

This job references BMW part 13621433077. Verify that number and test your own fan circuit before assuming a switch replacement is the answer.

A closer look at this job

The M54 Z4 radiator fan switch is the component addressed in this video, with BMW part number 13621433077 identified in the existing project notes. Fans that don't run as expected and coolant-temperature complaints can have multiple electrical and cooling-system causes, including wiring, control and coolant-related faults. Use the video to see this particular switch repair, not as evidence that every Z4 fan issue has the same cause. Confirm part applicability to your VIN and approach hot cooling-system components cautiously.

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Part numbers mentioned

13621433077