M18 x 1.5 Plug w/ thread‑in anode (20mm length x 15mm O.D.)

 

Fits 2.0L, 2.8L, 3.0L & 4.2L in‑line diesel engines

 

Also fits the 1.9L, 2.5L, 3.0L V6 & 4.2L V8 TDI diesel engines