Need Help - Oil leak

Hey guys,
On my s65 e92 m3, there is oil pooling next to the alternator. The OFHG was recently replaced and oil seems to be on the driver side of the car dripping from above the oil pan. The valve cover gaskets are also clean. I have added some pictures, lmk what you guys think.

Possibly the font main seal, which doesn't seem to be a common problem on these engines. Have you had the rod bearings done? Could be the oil pan gasket, another uncommon failure, but if you have had RBs done maybe the gasket was scored or the surface not cleaned well. If you haven't had them done then then when you do, the pan gasket will be replaced.
When doing my RBs the first pan gasket I received had a cut in the gasket like someone had threw a knife at it or stabbed it, fortunately I saw it before going to install and had it replaced. It's a metal coated gasket, so not easy to stab a hole in it.

Zbenner wrote

Hey guys,
On my s65 e92 m3, there is oil pooling next to the alternator. The OFHG was recently replaced and oil seems to be on the driver side of the car dripping from above the oil pan. The valve cover gaskets are also clean. I have added some pictures, lmk what you guys think.

This would be most evident of an OFHG seal. It looks like it's been leaking for quite a while. Are you sure this just isn't residual from when the seal was replaced? Did you clean up the area well enough?

I had the OFHG replaced last year. Unfortunately they probably didn’t clean the best. It’s on the driver side of the car. Would you think it’s a front crankshaft seal?

The most likely culprit is the oil filter housing gasket.
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https://www.m3post.com/forums/showthread.php?t=1312849
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The S65 engine (E90/E92/E93 M3) oil filter housing gasket (Part # 11427838276) is a common failure point that causes high-pressure oil leaks, often resulting in oil running down the driver's side of the engine. Replacing this rubber seal is intensive, requiring removal of the intake box, belts, and potentially the power steering pump, costing roughly $150-$500+ in labor.

Key Details for Replacement:
Gasket Part Number: 11427838276.
Symptoms: Oil leaking down the left side of the engine, oil on the oil pan, or burning oil smell.
Recommendation: Replace immediately when found to avoid engine damage.
Associated Parts/Tasks: It is recommended to replace the oil cooler gasket at the same time, perform an oil change, and replace the aluminum fasteners.

Common Pitfalls & Tips:
Tight Space: The rear bolt is notoriously hard to reach, requiring a very short T30 bit or a cut-down socket.
Fasteners: Ensure all aluminum fasteners are replaced, as they can stretch.
Cleaning: Thoroughly clean the mounting surface on the engine block to ensure the new gasket seals properly.

Zbenner wrote

I had the OFHG replaced last year. Unfortunately they probably didn’t clean the best. It’s on the driver side of the car. Would you think it’s a front crankshaft seal?

Take the car back to the shop who replaced the Oil Filter Housing Gasket last year and ask them to check if it's leaking again.

I wish I could take it back to see if it’s leaking again but I moved and can’t take it back. I’ll try to take off some pulleys to get a better visual I just don’t want to mess with the timing cause I heard that can be problematic.

Zbenner wrote

I wish I could take it back to see if it’s leaking again but I moved and can’t take it back. I’ll try to take off some pulleys to get a better visual I just don’t want to mess with the timing cause I heard that can be problematic.

Timing is not interrupted when doing the oil filter housing gasket. I replaced mine this winter. You can access the small bolt behind the harmonic balancer with a cut down torx bit as mentioned above. I used a small tool kit omgzirra_exe linked to me from amazon.

Zbenner wrote

I had the OFHG replaced last year. Unfortunately they probably didn’t clean the best. It’s on the driver side of the car. Would you think it’s a front crankshaft seal?

F4rmost wrote

Timing is not interrupted when doing the oil filter housing gasket. I replaced mine this winter. You can access the small bolt behind the harmonic balancer with a cut down torx bit as mentioned above. I used a small tool kit omgzirra_exe linked to me from amazon.

here you go: https://www.amazon.com/dp/B01F78UTAA?ref=cm_sw_r_cso_cp_mwn_dp_8GK16GXMMSARRNTTF1HV&ref_=cm_sw_r_cso_cp_mwn_dp_8GK16GXMMSARRNTTF1HV&social_share=cm_sw_r_cso_cp_mwn_dp_8GK16GXMMSARRNTTF1HV