The 2003 Lincoln LS was offered only with a 3.9 L V8 (Jaguar AJ-V8) or a 3.0 L V6 in earlier years—but by 2003 the V6 had been dropped. Therefore, there is no “cylinder 5” in a V6 configuration for this model year. If you have a V8, cylinders are numbered 1–4 on the passenger bank and 5–8 on the driver bank (front to rear).