Guide: Brake Disc/Pad Sizes

[MatthewH]

Guide: Audi A8 D3 Brake Disc/Pad Sizes

I recently had to purchase a set of front/rear brake discs and pads. There are various combinations of brake sizes which don't appear to be consistent against engine size.

I spent some time researching this and have found a reliable way to check which sizes you need without taking the wheel off and measuring it.

If you open the boot and look into the spare wheel area, you'll see a sticker like this:



These 3 letter codes are a list of "options" the car was originally equipped with (and paint code). Two of these codes refer to the brake disc sizes for front and rear.

The following is a table of relevant codes and their meaning:
- 1LL / 1LM => Front, 360mm
- 1LX / 1LG => Front, 323mm
- 1LJ => Front, 385mm
- 1KW => Rear, 310mm
- 1KE => Rear, 280mm
- 1KY / 1KZ => Rear, 335mm

As you can see circled in yellow on the photo above, my sticker contains the codes "1LL" and "1KW". This means my car has 360mm front and 310mm rear brakes.

Here are some equivalent part numbers for each size (these should be correct but please check before purchasing):

Front, 360mm

Discs:
- Pagid 54222
- Textar 92122200
- ATE 24.0134-0100.1
- Ferodo DDF1572
- Delphi BG9957
- Febi Bilstein 32520
- Brembo 09.9915.10
- Mintex MDC2069
- OEM 4E0615301P

Pads:
- Febi Bilstein 16526
- Ferodo FDB1832
- Mintex MDB2825
- ATE 13.0460-7182.2
- OEM 4E0698151K

Front, 323mm

Discs:
- Febi Bilstein 22964
- TRW DF4209S
- Delphi BG3524
- Vaico V10-80011
- OEM 4D0615301J

Pads:
- Febi Bilstein 16586
- Pagid T1223
- Mintex MDB2648
- Delphi LP1922
- OEM 8E0698151C

Front, 385mm

Discs:
- Febi Bilstein 38359
- OEM 4E0615301E / 4E0615301K

Pads:
- Febi Bilstein 16526
- Ferodo FDB1832
- Mintex MDB2825
- ATE 13.0460-7182.2
- OEM 4E0698151A / 4E0698151B / 4E0698151J / 4E0698151K

Rear, 310mm

Discs:
- Febi Bilstein 36238
- OEM 4E0615601K

Pads:
- Febi Bilstein 16588
- Brembo P85076
- Delphi LP1920
- Pagid T1410
- Mintex MDB2673
- OEM 4F0698451F

Rear, 280mm

Discs:
- Pagid 54522
- Febi Bilstein 43921
- OEM 4E0616601J

Pads:
- Febi Bilstein 16588
- Brembo P85076
- Delphi LP1920
- Pagid T1410
- Mintex MDB2673
- OEM 4F0698451F

Rear, 335mm

Discs:
- Febi Bilstein 36239
- OEM 4E0615601L

Pads:
- Febi Bilstein 16588
- Brembo P85076
- Delphi LP1920
- Pagid T1410
- Mintex MDB2673
- OEM 4F0698451F

After a quick shop around using the above part numbers, I managed to purchase a full set of discs and pads for my car (front and rear) for £150 including delivery. I used Mintex for fronts, and Febi Bilstein for the rears, as they were cheapest at the time (but still good brands).

EuroCarParts came to around £350 for a full set of Pagid parts so it was a decent saving.