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      05-26-2012, 08:50 PM   #1
808MGuy
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Where is the vehicle speed sensor? Front or rear wheels?

Just wondering which wheel the speedometer reading is tied to.
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      05-26-2012, 09:00 PM   #2
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i think its on the tranny
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      05-26-2012, 11:54 PM   #3
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So that would mean its sensing rear wheel rotation then?
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      05-27-2012, 12:08 AM   #4
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Quote:
Originally Posted by 808MGuy View Post
So that would mean its sensing rear wheel rotation then?

Yes. If you've driven it on ice or snow and gave it a bit of gas you'll notice the speedo coming up. It's been a long while I've done it with the M3 as I don't drive it in those conditions mainly but just about any other car/SUV i've driven in slippery situations, I'll see the speedo coming up.

ABS though on most cars is senced at the wheels individualy I've noticed but completely different from speedometer reading.

Why do you ask?
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      05-27-2012, 02:31 AM   #5
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Quote:
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If you've driven it on ice or snow
Being from Hawaii, I've never had to drive on ice or snow

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Originally Posted by BimmerRob08 View Post
Why do you ask?
I'm shopping for tires and I'm trying to find alternate sizes that still are as close to the OEM sizes as possible. The stagger front to back might not be exactly the same but I'm trying to keep it close. I just was curious as to which axle affected the speedo reading.
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      05-27-2012, 05:29 PM   #6
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Check with someone who's been on a dyno
If the speed was going up, then it's on the rear axle
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      05-27-2012, 06:21 PM   #7
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Quote:
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Check with someone who's been on a dyno
If the speed was going up, then it's on the rear axle
Good point
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      05-27-2012, 10:23 PM   #8
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Right rear wheel speed sensor processed by the DSC module.
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      05-28-2012, 01:03 AM   #9
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Quote:
Originally Posted by 808MGuy View Post
Being from Hawaii, I've never had to drive on ice or snow

oh, hahaha!


I'm shopping for tires and I'm trying to find alternate sizes that still are as close to the OEM sizes as possible. The stagger front to back might not be exactly the same but I'm trying to keep it close. I just was curious as to which axle affected the speedo reading.
You could try 255 and 275 F/R tires. But might be slightly a little wide for stock wheels. Depends on what wheels you have. I moved to ARC-8's. 8 & 9 inch and still running stock 245 & 265 and I love the look. It'll fit 265 and 285's in the future but it looks good and handles just great with the tire wall being a little streatched. The ARC-8's are 18" wheels by the way.

Good luck on the tire set up.

RB
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