Has anyone ever changed an alternator and belt tension wheel in a Z3?


Asked by Jul 25, 2010 at 05:39 AM about the BMW Z3

Question type: Maintenance & Repair

I tell you...That alternator and belt tension wheel in my Z3 looks impossible to swap out.  It looks like I need a special tool!  Anyone here ever done it?

2 Answers


It's pain in the ass. You need to remove most of your obstacles from the bottom. If you have access to a lift then use a lift, it's almost impossible in the driveway.

1 of 1 people found this helpful.

yes several times.you need a t-50 torx socket or a 40 dont remember he exact size.pull out the idler pulley should have a cover on it.pop it off then there is a 16mm i believe.disconnect the connector on the back of the alternator and positive cable .i dont disconnect the battery but you.take off the belt.take off the alternator bolts and may need to pry it off.should be 2 on the bottom and the one for the idler pulley goes throuh it.the tensioner might be mechanical or hydraulic.either or not hard to replace.

1 of 1 people found this helpful.

Your Answer

BMW Z3 Experts

  • #1
    Tom Demyan
  • #2
    Kelly Mayo
  • #3
View All

Related Models For Sale

Used BMW Z4
60 Great Deals out of 985 listings starting at $3,900
Used BMW Z3 M
103 listings starting at $8,391
Used BMW 3 Series
1,161 Great Deals out of 33,172 listings starting at $1,000
Used Mazda MX-5 Miata
76 Great Deals out of 4,362 listings starting at $2,900
Used Porsche Boxster
45 Great Deals out of 1,174 listings starting at $4,500
Used Chevrolet Corvette
294 Great Deals out of 20,725 listings starting at $2,990
Used Ford Mustang
724 Great Deals out of 38,316 listings starting at $895
Used BMW Z4 M
66 listings starting at $12,800
Used BMW M3
48 Great Deals out of 1,780 listings starting at $5,995
Used Mercedes-Benz SLK-Class
58 Great Deals out of 1,196 listings starting at $2,499
Used Honda S2000
15 Great Deals out of 406 listings starting at $7,500
Used Audi TT
39 Great Deals out of 877 listings starting at $1,998
Used Porsche 911
135 Great Deals out of 4,956 listings starting at $10,988
Used Nissan 350Z
69 Great Deals out of 1,269 listings starting at $3,250
Used Jeep Wrangler
314 Great Deals out of 16,231 listings starting at $2,500

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.