I'm preparing to replace the steering rack on my '03 Vibe (Base model, 1.8L 1ZZFE, FWD, AT, 179K), which involves dropping the frame cross-member that the rack bolts to. Since this is a relatively major job that involves supporting the engine from above and disconnecting the rear motor mount, I figured I'd take advantage of the overlap in labor to replace the rear motor mount while I'm at it. I also currently have the exhaust manifold out of the car for reasons detailed in a separate thread, which makes access to the rear motor mount bolts even easier.
However, I'm having trouble nailing down the correct engine mount part number(s) for my intended application. Rock Auto is usually my go-to for automotive replacement parts, and they carry all three engine mounts and the transmission mount available for purchase individually. They also offer two kits, each containing all four mounts:
1) SKP SKM3074K
2) SKP SKM3009K
The two kits differ only in which front engine mount is contained in each. The SKP SKM3074K kit contains engine front mount P/N SKMA62063, whereas the SKM3009K kit contains engine front mount P/N SKM9158.
The Rock Auto product description for the SKM3074K kit containing P/N SKMA62063 references "w/MU5 transmission" — the Pontiac RPO code for the four-speed A246E transmission in the FWD base model — and would seem to indicate that this is the required kit, and that SKMA62063 is the correct front engine mount for my application.
However, Rock Auto does not carry SKMA62063 for individual purchase, but only the SKM9158 part number. Amazon carries both the SKMA62063 and SKM9158 individual front engine mount part numbers, but indicates that the SKMA62063 mount is NOT compatible with my vehicle, whereas the SKM9158 IS. The two parts appear visually identical. Anybody have a clue as to the differences, or which is correct for my application?