2008 tagged posts

BMW X3 Automatic Transmission Service with Fluid and Filter Change for E83

automatic transmission

Here’s a walk thru of a BMW X3 automatic transmission service with fluid and filter change on a 2008 E83. The 2008 has a 6 speed GM 6L50 transmission that uses Dexron VI automatic transmission fluid. You’ll need 6-7 quarts of replacement fluid, the replacement filter, replacement pan gasket and a few other items I’ve listed below. I found it easiest to simply buy a 2008 BMW X3 transmission service kit which includes the replacement fluid, replacement filter, replacement pan gasket, hardware, O ring, and drain plug. I was paranoid about a fluid leak so I wanted to do everything right for this service. Some of the special tools I needed for this procedure were a torque wrench, and some sort of pump to get the fluid into the transmission...

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BMW X3 Coolant Expansion Tank Leak and Replacement Fix E83

coolant expansion tank

If your BMW X3 low coolant light comes on, it’s normal to have to top off the tank once or twice a year. But if you top off your tank and the low coolant light comes on again within a few days or a week, then you probably have coolant leaking from the system somewhere. First, check the back of the oil fill cap and make sure you see only brown oil as expected. If it’s foamy or creamy texture, you might have a head gasket leak. Most likely you don’t have a head gasket leak and it’s a coolant hose or coolant expansion tank leak. In the video below I explain how to diagnose a BMW X3 coolant expansion tank leak and how to replace the tank.

As you can see in my video, I had a small leak that didn’t even puddle water in the garage, at first...

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BMW X3 fan noise fix

The BMW X3 fan blower separated from the white mounting plate

I’m happy to say the most annoying sound in the world is finally fixed. If you had the same problem as me, your interior HVAC fan would make a tiny, annoying squeal or squeak or cricket sound or noise or whatever you want to call it when on the lowest two or three speeds. It wouldn’t always squeak, but when it did it was annoying, especially since the car is usually so quiet and refined. All good news here, it was a quick fix and I did it for free. You’ll be happy once you too eliminate your BMW X3 fan noise.

Update:
Unfortunately – I still have the issue. It turns out the true fix for this issue is photo documented here. Some threads talk about servicing the CPU fan located behind the driver’s side footwell, but this is not the noisy fan...

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BMW X3 muffler rattle fix for no cost

BMW X3 E83 muffler

For about 6 months now I’ve been experiencing a BMW X3 muffler rattle. At first I ignored it but as it became more persistent and embarrassing, I decided to get under the car and troubleshoot it. All the connections under the car were firm and in good condition. What was causing the muffler rattle that sort of sounded like an aluminum can in my exhaust? I also noted, it only seemed to happen on start up, idle, and when the car was under no load decelerating.

I took a video and pasted it below with more details. Basically, there is a baffle in the right exhaust pipe that opens and closes based on a vacuum line. At idle and no load, the baffle closes and it opens once the engine starts winding up. It’s also closed when the car is off...

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