Diesel injector high pressure pump locking pin used to lock the fuel pump in its timed position. The 3551 locking pin can be found in many diesel VAG timing kits.
- Included in kits 3472, 3574, 3978, 4346, 4772, 4684, 4867, 5130, 6557 and 7588.
- Pin diameter: 6mm.