VW MK3 TDI Diesel Piston Oil Squirter Set — AHU & AAZ Engine Codes

OEM piston oil squirter set sourced from a Volkswagen MK3 diesel engine. These small but critical components spray pressurized engine oil onto the underside of the pistons to control heat and reduce wear — essential for the longevity of the AHU and AAZ diesel engines that made the MK3 Jetta and Golf TDI legendary for their reliability and fuel economy.

With VW having discontinued a large percentage of MK3 factory parts, sourcing these from a known-good donor engine is often the only viable option for owners doing a rebuild or addressing oil squirter failure.

Engine Compatibility

• AHU — 1.9L TDI (found in MK3 Jetta & Golf TDI, 1996–1999)
• AAZ — 1.9L Diesel/TDI (found in earlier MK3 models)

Fitment

• Volkswagen Jetta MK3 TDI: 1996–1999
• Volkswagen Golf MK3 TDI: 1996–1999

Why V DUB HUB

• ✔ OEM Volkswagen — not aftermarket
• ✔ Sourced from a known donor engine
• ✔ Inspected before listing
• ✔ MK3 TDI specialist