Audi A3 qu. 1,9 TDI 2000-2003 AGU AEB 1.8T AGU AEB 910029 Cylinder Head Assembly 058103373D 06A103351L for VW Passat Golf/Audi A3 A4 Jetta Beetle Golf – OEM 910029

Product Overview: Engineered for AUDI VW AGU AEB engines, this cylinder head assembly is a complete replacement unit built to original equipment tolerances. The assembly arrives complete with valves fitted and machined combustion chambers, making it a practical solution for a warped, cracked or valve-damaged original cylinder head.

Key Features: CNC machining holds deck flatness, valve seat concentricity, valve stem protrusion and port geometry to original equipment limits. Pre-installed, honed valve guides and cut seats produce even sealing and consistent compression on every cylinder. Pressure and vacuum testing before packing confirms the casting and water jacket are sound.

Vehicle Compatibility: It fits AUDI VW models including TT Roadster (8N9), Audi A3 qu. 1, 9 TDI, Audi A4 Avant qu. 1, Audi A4 qu. 2 and 8 V6. Listed production years include 1999-2006, 1998-2003 and 2006-. If a vehicle is not shown in the compatibility list, cross-reference the engine code and original reference number to confirm fitment.

Specifications: Key specifications: engine code AGU AEB; material high-grade alloy; size Standard Size; condition New; warranty 12 Months. Purpose is replacement and repair of the original component in standard form. The assembly is supplied in standard size and is pressure tested before packing to confirm casting integrity.

OEM / Reference Numbers: OEM and cross-reference numbers covered by this listing are 06A103351L.

Applications: Uses include head gasket repairs, valve and seat damage repair, engine rebuilds and scheduled fleet maintenance. The assembly suits passenger cars, vans, MPVs, pickups and light commercial vehicles that use the listed engine. The part is a sensible stock item for workshops that service this engine family regularly and want to minimise vehicle downtime.

Benefits / Replacement Information: Installing a new head assembly restores lost compression, corrects coolant loss and combustion leakage caused by cracking or distortion, and returns the engine to reliable service. The pre-assembled, pre-machined format avoids the labour and uncertainty of welding, skimming and re-seating an original head. A new component avoids the lead time and uncertainty of sourcing and reconditioning a used original part.

Installation or Fitment Notes: Before fitting, confirm the engine code and reference number and inspect the block deck for flatness and the head bolt threads for damage. Where stretch bolts are specified, always fit new head bolts and the correct gasket, and make sure bolt holes are clean and dry. Record the fitted part number and mileage in the service history so future maintenance references the correct replacement. Follow the factory tightening sequence and stages, refill the cooling system with the correct coolant, and re-check for leaks after warm-up.