Rotor size for 2008 XC90

lancelyons · Post by **lancelyons** » 23 Apr 2020, 17:09

Hi, I am going to replace brakes for my daughters 2008 xc90 2wd. I dont have the car here to measure the rotor size and a couple dealers I called wouldnt tell me the size for her VIN.

the VIN is

YV4CY982581466669

Does anybody know how I can tell what the rotor size is from that VIN?

Thanks in advance

Post by **ggleavitt** » 24 Apr 2020, 08:12

Post removed, new thread created

wanderdüne · Post by **wanderdüne** » 24 Apr 2020, 14:58

Also the 316 doesn't have any fins around the "hat" part of the rotor in the center.

Post by **cn90** » 26 Apr 2020, 20:35

Very easy to measure herself.
Or bring the car to a local mechanic to measure for her.
It took me 1 minute to measure the diameter of the rotor, no need to remove the wheels.

GreenMagicMan · Post by **GreenMagicMan** » 27 Apr 2020, 07:45

Had same big problem. Finally discovered great tip / hint: It's likely related to the wheel size if they are the stock wheels:
I think it was:
17" wheels are usually the smaller rotors: 316mm
18" wheels are usually the middle size: 328mm
19" wheels are usually the large size: 336mm

This actually worked perfectly for our 2007 XC90 SI6 engine car!! It WAS very hard to actually figure it out measuring them in person anyway, EVEN with the caliper and wheel totally off the car. The diameter measurement of the car was an in between measurement. And there were NO stampings anywhere on the brake rotor either - like is often the case where they are marked. Good luck!

VIN did not help us either, at the parts specialty store or the dealer. We got the wrong ones first 328. You could see in the parts were clearly different so we wound up getting the 336 in the end.
I would guess as you're 2WD you have the smallest size wheels - the 17" stock and therefore I would guess you have the 316mm.

wanderdüne · Post by **wanderdüne** » 28 Apr 2020, 06:04

GreenMagicMan wrote: ↑27 Apr 2020, 07:45 Had same big problem. Finally discovered great tip / hint: It's likely related to the wheel size if they are the stock wheels:
I think it was:
17" wheels are usually the smaller rotors: 316mm
18" wheels are usually the middle size: 328mm
19" wheels are usually the large size: 336mm

This actually worked perfectly for our 2007 XC90 SI6 engine car!! It WAS very hard to actually figure it out measuring them in person anyway, EVEN with the caliper and wheel totally off the car. The diameter measurement of the car was an in between measurement. And there were NO stampings anywhere on the brake rotor either - like is often the case where they are marked. Good luck!

VIN did not help us either, at the parts specialty store or the dealer. We got the wrong ones first 328. You could see in the parts were clearly different so we wound up getting the 336 in the end.
I would guess as you're 2WD you have the smallest size wheels - the 17" stock and therefore I would guess you have the 316mm.

OP: disregard this post.