My passenger side rear diff was leaking under warranty. About 5-10k miles later, the driver side leaks but I was out of warranty. I ordered the new seal and collar nut for about $50 and had a shop do the repair. I paid about $400 for them to replace the seal and drain/fill with diff fluid.
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2022 CT4-V Blackwing 6-speed
SOLD: 2016 340i xDrive 6-speed
DAW v2.5 turbo E40 | Dorch S2 | VRSF DP | MST intake | AWE catback | 335is clutch | CSF heat exchanger | RK Autowerks intake manifold | Orange M Perf Brake Kit | KW Street Comfort coilovers | GTS taillights V2
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