Please see attachment for DIY with photos.
Hello. This is a DIY for the replacement of the main and AC belts, pulleys, and tensioners on a 2001 BMW M3. My pulley(s) started to show signs of failure in Nov/Dec 2015 when they would intermittently squeak at about 83,XXX miles. At a track event, my mic was placed in the engine bay, and you could hear the squeaking in the video (I didn't hear it in person likely due to my helmet). Sometime in late March, the squeaking suddenly reappeared and wouldn’t go away at 84,1XX miles, so I drove it home to park it in the garage until I had time once the semester was over to replace parts. Work was done at 84,164 miles. I ordered the parts through eEuroparts (first time through them), and it was a pleasant experience. Great customer service, and they will get you parts that are not already in their online catalog. I decided to replace all belts, pulleys, tensioners, and hardware because I had no record of previous replacement.
Video of squeaking pulley. If you skip around, you will hear it get progressively louder.
The job is pretty straightforward and isn't difficult, probably 3/10. It took me about 5-6 hours to do, which included taking the time to take photos and wasting time doing other things. Some defining terms.. when I say "left" or "right," right/left will be as if you are sitting inside the car and facing the front. When you are facing the front of the car while working on it, right/left will be flipped, if that makes sense. Clockwise is CW and counter-clockwise is CCW.
Below is the list of parts I am replacing in this DIY. You could reuse your hardware if you want to; I elected to use new ones. You could use this DIY to replace just belts and/or pulleys, but be smart. Don’t remove a tensioner if you are only replacing belts and pulleys. Don’t remove a pulley if you are only replacing belts. Don't remove the plastic under tray if you plan to do the work from the top. I worked from both above and below.
B is belt, P is pulley, T is tensioner, C is dust cap/cover, everything else is hardware. X1/2 is the quantity. The last two parts in both lists (478 and 030) are the same. They are only separated to show you how many of the parts will be used in each belt drive system; in total, you will need three of each.
PART NUMBER
MAIN BELT DRIVE
11287837898 x1 B
11281748131 x1 P
07129905534 x1
07119904533 x1
07119904532 x1
11287835130 x2
11287841228 x1 P
07119904677 x1
11287838797 x1 T
11281730349 x1 C
11281727159 x1 C
12311713143 x1 C
11281730532 x1 C
07119912478 x1
07119907030 x1
AC BELT DRIVE
11287830946 x1 B
11281433571 x1 P
07119912478 x2
07119907030 x2
Hello. This is a DIY for the replacement of the main and AC belts, pulleys, and tensioners on a 2001 BMW M3. My pulley(s) started to show signs of failure in Nov/Dec 2015 when they would intermittently squeak at about 83,XXX miles. At a track event, my mic was placed in the engine bay, and you could hear the squeaking in the video (I didn't hear it in person likely due to my helmet). Sometime in late March, the squeaking suddenly reappeared and wouldn’t go away at 84,1XX miles, so I drove it home to park it in the garage until I had time once the semester was over to replace parts. Work was done at 84,164 miles. I ordered the parts through eEuroparts (first time through them), and it was a pleasant experience. Great customer service, and they will get you parts that are not already in their online catalog. I decided to replace all belts, pulleys, tensioners, and hardware because I had no record of previous replacement.
Video of squeaking pulley. If you skip around, you will hear it get progressively louder.
The job is pretty straightforward and isn't difficult, probably 3/10. It took me about 5-6 hours to do, which included taking the time to take photos and wasting time doing other things. Some defining terms.. when I say "left" or "right," right/left will be as if you are sitting inside the car and facing the front. When you are facing the front of the car while working on it, right/left will be flipped, if that makes sense. Clockwise is CW and counter-clockwise is CCW.
Below is the list of parts I am replacing in this DIY. You could reuse your hardware if you want to; I elected to use new ones. You could use this DIY to replace just belts and/or pulleys, but be smart. Don’t remove a tensioner if you are only replacing belts and pulleys. Don’t remove a pulley if you are only replacing belts. Don't remove the plastic under tray if you plan to do the work from the top. I worked from both above and below.
B is belt, P is pulley, T is tensioner, C is dust cap/cover, everything else is hardware. X1/2 is the quantity. The last two parts in both lists (478 and 030) are the same. They are only separated to show you how many of the parts will be used in each belt drive system; in total, you will need three of each.
PART NUMBER
MAIN BELT DRIVE
11287837898 x1 B
11281748131 x1 P
07129905534 x1
07119904533 x1
07119904532 x1
11287835130 x2
11287841228 x1 P
07119904677 x1
11287838797 x1 T
11281730349 x1 C
11281727159 x1 C
12311713143 x1 C
11281730532 x1 C
07119912478 x1
07119907030 x1
AC BELT DRIVE
11287830946 x1 B
11281433571 x1 P
07119912478 x2
07119907030 x2
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