[Ishi]

Good day all

2007 m6 convertible with 120 000km (approx. 75000miles).

Car recently threw an engine malfunction and reduced power warning, with red line reduced to 7000rpm.

BMW has diagnosed the car as having a fault with the electric oil pumps (circuit showing 'open' I think).

The tech says its an oil pan off job and has recommended that I change both electric oil pumps and the main mechanical oil pump. He tells me that the mechanical oil pump could be failing/starting to disintegrate, which could be causing the electric oil pump fault, and that at this mileage its recommended to change all oil pumps.

Can a member with experience/knowledge of this issue please advise if the BMW tech's recommendation is a sound one?

Obd code attached.

Much appreciated.

 

[o2sys]

The main oil pump is mechanical chain driven and that requires dropping the oil pan. This would also trigger VANOS pressure related codes.

The electrical pumps do not require dropping the pan and codes only show bank2 error so I would try replacing that first. Other codes might be shadow codes relating to oil pump. Clear them after new pump and test drive and recheck for returning fault codes.

TIS on electric oil pump:

https://www.newtis.info/tisv2/a/en/e63-m6-cou/repair-manuals/11-engine/11-13-oil-sump/EVZMN0J

 

[flacoramos]

Your mechanic has no clue, but that's the norm unfortunately. The only code you have that will cause a CEL and failsafe mode is the fuel pressure ones. Start with basics: fuel filter, fuel pump, injectors, fuel pressure sensor.

You don't need to do anything with the main oil pump. You do need to change one of the aux pumps, neither of which requires dropping off the oil pan. I wouldn't worry about the oil pump code until you sort out the fuel pressure problems.

 

[Ishi]

@02sys and @flacoramos thanks very much buddies. Suspected the tech was talking bunkum.

I am attaching the full obd report as there are some other codes logged and it is now clear from your responses that the issue is wider than just the oil pump.

Can you guys please run your eye over and give me your thoughts?

Once again much appreciated as there are no reputable specialised indys in my area that I know of and the agent is not inspiring any confidence.

 

[flacoramos]

Too many things in there. I'd erase everything and see what comes back. I now also suspect the voltage regulator. That can cause a lot of random unrelated errors don't know if anyone has seen fuel errors tho. Do a search on the regulator replacement it's well documented in the e60 forum.

 

[o2sys]

Exactly what flacoramos said too many fault codes probably shadow codes of something else. Was the battery drained recently and jump started?

Need to clear all and rescan, bet more than half of those codes were false triggers.

 

[Ishi]

Sorry guys I should have mentioned the ffg:

All codes except for oil pump and fuel pressure codes predated the engine malfunction and reduced power warning. I had picked the older codes up on a previous diagnostic and had just deferred them due to schedule, plus the car had been running well with no symptoms other than an occasional 'increased emissions' light (airbag light is obviously also illuminated due to airbag fault codes).

Currently the engine malfunction warning does not come up when the car is driven but I assume that the warning cycles are based on number of starts. The engine malfunction and reduced power warning is my priority.

Car has a one year old battery which has never been drained or recharged.

 

[Beniki]

Hey Ishi,

Where in SA are you located?

 

[Ishi]

@Beniki hey buddy, I'm on the east coast, city of Durban.