13-tooth drive sprocket for tachometer

For A3 (8L):
- 1.6 101 hp (AEH, AKL, APF)
- 1.8 125 hp (AGN, APG)
- 1.8 Turbo 150 hp (AGU, AQA, ARX, ARZ, AUM)
- 1.8 Turbo 180 hp (AJQ, APP, ARY, AUQ)
- 1.9 TDi 90 hp (AGR, ALH)
- 1.9TDi 100 hp (ATD, AXR)
-1.9TDi 110 hp (AHF, ASV)

For TT (8N):
- 1.8 Turbo 150 hp (AUM)
- 1.8 Turbo 163 hp (BVP)
- 1.8 Turbo 180 hp (AJQ, APP, ARY, AUQ)
- 1.8 Turbo 190 hp (BVR) This sprocket or "carrot" is housed in the gearbox