Front Rotor size for 2008 Audi S5?

[henryjkwok]

Hi There,

I am in the process of ordering new rotors and pads for my 2008 S5. I am getting conflicting front rotor sizes for 2008 S5. Some sites online say 320mm and some say 345mm. Can someone please confirm the correct size? I am thinking it is 345mm, but the place I am ordering from is telling me 320mm.

I know the rears are 330mm, so I thought it would be weird to have the front smaller if it is 320mm. Anyone know the correct size?

Thanks

[LINDW4LL]

They are 345mm.

[henryjkwok]

They are 345mm.

Thanks for the reply. Can you pls tell me why the two sizes then? This is taken from Audi USA's site (link below). The difference in the OE # is the "A" and "M" after the number. Does that apply to Automatic or Manual?

http://www.audiusaparts.com/auto-par...nt-brakes-scat

1 8K0-615-301-A ROTOR, LEFT
320MMM
$104.78

1 8K0-615-301-A ROTOR, RIGHT
320MMM
$104.78

1 8K0-615-301-M ROTOR, LEFT
345MM
$112.84

1 8K0-615-301-M ROTOR, RIGHT
345MM
$112.84


THanks

[LINDW4LL]

It's just an indexing error. The B8 S4 and S5 only came with one size rotor- 345mm, regardless of automatic or manual.

That 320mm part number is the standard A4/A5/Q5 rotor.

[ECS Tuning-Audi]

It's just an indexing error. The B8 S4 and S5 only came with one size rotor- 345mm, regardless of automatic or manual.

That 320mm part number is the standard A4/A5/Q5 rotor.

This.

Jason

[ssv22]

This.

Jason

I am also looking for the correct size for the 2011 A5 front rotors. Do all A5 variants have the same size or is it different for S-Line prestige vs non-sport version?

[henryjkwok]

Thanks for ure answers Jason and Hayden. This forum is so helpful! I love it.