differential oil pan and differential pinion seal leaking

longfellow · 06-08-2023, 06:49 PM

Just got diagnosed with this. Is this common with these cars? It’s only has 25k miles.

How much should this run me to repair? Shop is quoting me close to $2500. This includes replacing the differential oil pan gasket, pinion seal, pinion nut, and fluid.

Fat Goose · 06-09-2023, 11:08 PM

Looks like its just your pinion seal. Not the gasket.. I had the same issue at the same mileage. FCPEuro has a new and improved version of the pinion gasket seal that will precent this from happening. Should cost around $800 out the door.

Fat Goose · 06-09-2023, 11:10 PM

You will need to replace the pinion nut as well as that is a one use item, the fluid change is a simple DIY, but should be done as well just to replace any fluid lost.

Tdog86 · 06-10-2023, 01:19 PM

If it’s just leaking from the pinion seal replace, don’t change axle seals if not needed. I had a small seep no dripping on my axle seals and had BMW replaced one under third-party warranty, after that it was leaking/drips. They couldn’t fix the problem so they replace the whole rear differential. Many other four members have had their axle seals replaced, and it was worse off than before.

06-08-2023, 06:49 PM	#1
longfellow New Member 5 Rep 29 Posts Drives: F82 Join Date: Jan 2023 Location: Atlanta iTrader: (0)	Just got diagnosed with this. Is this common with these cars? It’s only has 25k miles. How much should this run me to repair? Shop is quoting me close to $2500. This includes replacing the differential oil pan gasket, pinion seal, pinion nut, and fluid. Attached Images
	Appreciate 0 Tweet Quote

06-09-2023, 11:08 PM	#2
Fat Goose Lieutenant 246 Rep 513 Posts Drives: '18 F83 ZCP 6MT \| F/A-18E Join Date: Dec 2012 Location: Virginia Beach, VA iTrader: (1)	Looks like its just your pinion seal. Not the gasket.. I had the same issue at the same mileage. FCPEuro has a new and improved version of the pinion gasket seal that will precent this from happening. Should cost around $800 out the door.
	Appreciate 0 Quote

06-09-2023, 11:10 PM	#3
Fat Goose Lieutenant 246 Rep 513 Posts Drives: '18 F83 ZCP 6MT \| F/A-18E Join Date: Dec 2012 Location: Virginia Beach, VA iTrader: (1)	You will need to replace the pinion nut as well as that is a one use item, the fluid change is a simple DIY, but should be done as well just to replace any fluid lost.
	Appreciate 0 Quote

06-10-2023, 01:19 PM	#4
Tdog86 Private First Class 68 Rep 149 Posts Drives: BMW M3 Join Date: Feb 2020 Location: Bay Area iTrader: (1) Garage List 2016 BMW M3 [9.50] 2016 bmw m3 [0.00]	If it’s just leaking from the pinion seal replace, don’t change axle seals if not needed. I had a small seep no dripping on my axle seals and had BMW replaced one under third-party warranty, after that it was leaking/drips. They couldn’t fix the problem so they replace the whole rear differential. Many other four members have had their axle seals replaced, and it was worse off than before.
	Appreciate 0 Quote