Piston with Rings for Mk4/B5 TDI Engines

The ARL 038107081AA is a replacement piston for select Volkswagen TDI models. This particular piston is intended for cylinders 1 and 2 and features a cooling galley and included rings. It is offered as a 0.5mm oversize option, suitable for ALH and BEW engines. Applications include the Mk4/B5 TDI, Jetta, Passat, Golf, and Beetle. Some sources indicate specific fitment for Mk3 AHU TDI and 1Z Passat TDI as well, though this part number (038107081AA) is specifically for cylinders 1 & 2, with a corresponding part number (038107081AB) for cylinders 3 & 4 when purchasing a full set. The piston is made by Nural, an OE manufacturer, and is also available from brands like Mahle and Kolbenschmidt. Some listings specify that this part may not be available to order or is discontinued, while others provide a 2-year/24,000-mile warranty.