Which diameter brake disc?

[ReflexRob]

Morning everyone

I'm looking to order some front discs but have no idea which of the following would fit my 2005 AXX engined car (from GSF website - they have 33% off this weekend):

312mm diameter
288mm diameter
280mm diameter
345mm diameter

They have PR numbers next to the different types - like 1ZE, 1ZP etc - is that anything to do with my VIN number?

I can't measure the diameter without stripping the disc off either and need the car this weekend.

Thanks for any help......

[rich83]

312mm

[ReflexRob]

Thanks - I've now found that out too - I should have searched before posting!

[Shoduchi]

You can find your car's PR codes in a stamp in the boot floor or on your car's manual. You can then use an online PR decoder to know what each means.

[anorganix]

Hi,

These have probably been posted here and there but might still benefit someone.
Please feel free to add the newer models/platforms to the list.

Audi S3 / Audi TT (3.2) / VW MK5 R32 / Seat Cupra 2
Front > 345mm x 30mm - vented discs
Rear > 310mm x 22mm - vented discs

Audi A3 (2.0 TFSI) / Audi TT (2.0 TFSI) / VW Golf GT(I) (2.0 TFSI / 2.0 TDI) / Seat Leon FR (2.0 TFSI / 2.0 TDI)
Front > 312mm x 25mm - vented discs
Rear > 286mm x 12mm - solid discs

Audi A3 AWD
Front > 288mm x 25mm - vented discs
Rear > 286mm x 12mm - solid discs

Audi A3 FWD
Front > 280mm x 22mm - vented discs
Rear > 255mm x 10mm - solid discs

[ReflexRob]

Thanks chaps