2021 G-63 Rear Main Seal Leaking
2021 G-63 Rear Main Seal Leaking
Noticed a few drops of oil on the garage floor a couple of days ago and took it to dealership. The rear main seal is leaking and needs to be replaced along with along with the oil separators. Is this a fairly common issue? The truck has 38,500 miles on it.
Last edited by TNMICH; Feb 19, 2026 at 08:17 PM.
Yeah, it happens. The rear main seal can go, and the oil separators (cyclonic separators) are a known weak point on the M177 engine. Pretty common for that mileage. Good they caught it all under warranty hopefully.
Yup, a possibility for any M1177 vehicle, G, S and C we see less than E... sounds like a weird nursery rhyme.
Trenton O. Gibson
tgibson@highline-autos.com
Highline Autos
Direct: 602.909.9216
Office: 480.348.0777
Trenton O. Gibson
tgibson@highline-autos.com
Highline Autos
Direct: 602.909.9216
Office: 480.348.0777
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