OEM 1.9 TDI Standard Size Piston Set (Mk3, B4, Mk4 ALH)

What It Is
A set of 4 OEM Volkswagen pistons for the 1.9L TDI, standard size for a stock, non-bored block. The set includes pins and rings, manufactured by Nural/Federal Mogul, the same supplier VW dealerships use for replacement pistons.

Part Numbers

• 2x 038107065AA for cylinders 1 and 2
• 2x 038107065AB for cylinders 3 and 4

When to Use Standard vs. Oversize
This is the standard-size set, sized for a block that has not been rebored. If your block has already been bored oversize, or you're planning to bore it during this rebuild, KermaTDI's oversize (.5mm over stock) piston set is the correct fit instead.

Fitment

• 1997-1998 Mk3 Jetta TDI, AHU engine
• 1996-1997 B4 Passat TDI, AHU or 1Z engine
• 1999-2003 Mk4 Golf and Jetta TDI, ALH engine
• 1998-2003 Mk4 New Beetle TDI, ALH engine
• 2002-2003 Mk4 Jetta Wagon TDI, ALH engine

Common Questions

Do these include rings and pins?
Yes, the set includes pins and rings along with the 4 pistons.

How do I know if I need standard or oversize pistons?
If your block hasn't been bored, standard size is correct. If it's already been bored, or you're boring it as part of this rebuild, you'll need the oversize (.5mm over stock) piston set instead.

Are these genuine OEM pistons or aftermarket?
They're manufactured by Nural/Federal Mogul, the same company that supplies VW dealerships with replacement pistons.

Does this fit both Mk3 and Mk4 platforms?
Yes, this set covers the AHU engine in Mk3 Jetta and B4 Passat, as well as the ALH engine across Mk4 Golf, Jetta, Jetta Wagon, and New Beetle.