[JDUB1]

Electronic Oil Measurement via iDrive stops at 15% (there are several threads on this). The fixes people have (oil filter cap missing parts, oil temperature range not appropriate for measurement) do not seem to be my fix. The dealership and Indy said BMW technical docs say to replace oil pump. The oil pump seemingly works because my engine has not blown up.

What other parts should I preemptively replace while I have the Oil Pump replaced? I do not know anything about these parts or the job. Are there other parts prone to failure over time that are like a couple hundred bucks that I should replace since the labor is being done anyway? Replacing the oil pump is the most expensive repair I will have had ($3.1k+) and it looks like it's mostly labor, so anything I can proactively change now to avoid more labor costs down the road is seemingly a good idea.

Thank you folks.
j

[SuperLomi]

Rod bearings would be a good idea, while you're in there.

Assuming they will do this by dropping the subframe there's not much else I can think of.

[zinner]

There is an oil level sensor, they are known to fail, I don't believe it's a big job. Did they talk about that component at all ? I bet oil pump is a big job so 3,100 doesn't sound crazy. I have only had to do an oil pump in an LS6 but it was fairly involved. They probably have to remove the timing chain and clear a lot of stuff out of the way to get there. A lot of what should be replaced can be determined by inspection once you are in the engine, just need to put faith in the mechanic really.

[Pussiwillow]

I have never heard of replacing the oil pump because your I drive oil measurement stops at 15%
There's an oil level sensor, I would start there, you would have oil pressure related codes at some point or oil light would be on etc if the pump was failing…
My buddy was having a stutter issue where the car would nearly stall for a minute and then start going again, it tripped an oil pressure code because of the very low rpm situation.

[n55david]

Pumps fine. Try the sensor.

[thejeremyman9]

I tend to agree, prol not the pump, what's your oil pressure?

[JDUB1]

I assume I have no oil pressure warnings. I don't actually know what they look like, but I assume it's major and would be very obvious on the dash or idrive.

I took my car to a track day with this issue and my engine didn't explode, so I assume oil pressure is just fine.

[Polo08816]

Originally Posted by JDUB1

Electronic Oil Measurement via iDrive stops at 15% (there are several threads on this). The fixes people have (oil filter cap missing parts, oil temperature range not appropriate for measurement) do not seem to be my fix. The dealership and Indy said BMW technical docs say to replace oil pump. The oil pump seemingly works because my engine has not blown up.

What other parts should I preemptively replace while I have the Oil Pump replaced? I do not know anything about these parts or the job. Are there other parts prone to failure over time that are like a couple hundred bucks that I should replace since the labor is being done anyway? Replacing the oil pump is the most expensive repair I will have had ($3.1k+) and it looks like it's mostly labor, so anything I can proactively change now to avoid more labor costs down the road is seemingly a good idea.

Thank you folks.
j

If you track your car or plan to track your car, it's worth considering retrofitting the S55 oil sump system.

[terryd5150]

Originally Posted by Polo08816

If you track your car or plan to track your car, it's worth considering retrofitting the S55 oil sump system.

Or use the M2 version.

It's the S55 set-up modified for a single turbo instead of twins.

[Polo08816]

Originally Posted by terryd5150

Or use the M2 version.

It's the S55 set-up modified for a single turbo instead of twins.

The N55 M2, S55 M2, and S55 M3/M4 oil sump system should be the same.

https://www.bimmerworld.com/S55-Oil-...-435i-N55.html

You'll need a M car oil pan though.

[terryd5150]

Originally Posted by Polo08816

The N55 M2, S55 M2, and S55 M3/M4 oil sump system should be the same.

https://www.bimmerworld.com/S55-Oil-...-435i-N55.html

You'll need a M car oil pan though.

The M2 N55/S55 and M3/4 S55 do all use the same oiling system, but the M2 N55 is set up for the single turbo feed & return lines where the S55 has two oil feeds and two returns.

[harkes]

I have had all of the issues you mention.

1. Make sure the oil temp is in the range of 65 - 90C when you do the measurement
1.5. Check you oil pressure ~45psi idle and ~80psi at 6500rpm
2. Clean the Oli Pressure valve 11417622768 and check function (can be done in your drive way with simple tools)
3. Change the oil level sensor

Changing the pump sound completely crazy at this stage! Honestly I see no need to upgrade the oil system on the N55. Sure, for peace of mind. Done many track days myself also running CUP2s, and yes, oil pressure will drop to 25psi during hard braking but if that was a real issue, then every engine (car) making an emergency stop would have died.

[JDUB1]

Originally Posted by harkes

I have had all of the issues you mention.

1.5. Check you oil pressure ~45psi idle and ~80psi at 6500rpm

Is there a way to check the oil pressure without external equipment (e.g. through idrive)?

Update from me. The BMW-dealership mechanics said they checked out everything and oil pump replacement is the only thing to do. If they come back and it doesn't fix the issue I am going to be very upset given how expensive this repair is for a part that is seemingly working fine. I'll update again so posterity can learn from my experience

[thejeremyman9]

Originally Posted by JDUB1

Is there a way to check the oil pressure without external equipment (e.g. through idrive)?

Update from me. The BMW-dealership mechanics said they checked out everything and oil pump replacement is the only thing to do. If they come back and it doesn't fix the issue I am going to be very upset given how expensive this repair is for a part that is seemingly working fine. I'll update again so posterity can learn from my experience

You can check oil pressure through ODB2 with various apps, including some free ones i believe.

I can't believe you would proceed with oil pump replacement at this stage, there is a good chance you are going to be throwing away a lot of money...

[JDUB1]

Update: dealership's oil pump replacement solved the issue. Oil level measurement works.

[Tobz_au]

this is such an odd fix to the issue.....

[JamesBMW123]

Hello, this is my first post on here and I made an account actually specifically for this reason.

I to was quoted an oil pump replacement from the dealer for my 2014 335i. My oil level measurement works (although inaccurate) but will stop working if my oil temp is above 90C. This was about a year ago, and my car is fine so obviously my oil pump works.

I’m wondering if anyone else is having this issue or if there has been a better fix reported then oil pump replacement which I think is honestly insane. Thanks!

[onyourheadtop]

I wanted to chime in here. I know it's not a recent post but I was also having the same issue.

Before I decided to throw parts at it I had a dealership check out the issue.
They also told me its the oil pump and that replacing it would resolve the issue, but that my car wouldn't be at any risk either because if oil were to be low, I should still receive a warning.

I never felt great about this but I've moved on and change oil every 3000 miles. I also add a quart at some point towards the end of the life cycle for peace of mind.

Curious to know how common this was.. if it makes a differenceI have a 2014 435ixdrive, Canadian.

[JamesBMW123]

Originally Posted by onyourheadtop

I wanted to chime in here. I know it's not a recent post but I was also having the same issue.

Before I decided to throw parts at it I had a dealership check out the issue.
They also told me its the oil pump and that replacing it would resolve the issue, but that my car wouldn't be at any risk either because if oil were to be low, I should still receive a warning.

I never felt great about this but I've moved on and change oil every 3000 miles. I also add a quart at some point towards the end of the life cycle for peace of mind.

Curious to know how common this was.. if it makes a differenceI have a 2014 435ixdrive, Canadian.

I’m also xDrive and Canadian. Wondering if you are near my area