“Engine Oil Pressure Too Low”

[razorlab]

I wonder if the software update is absolutely needed. Would you be able to
do it yourself or would you need to take it to a dealer and possibly have the DME locked if you're tuned? Another thing to worry about.

That is to make sure the car has had the brake recall performed (which is a software update). The oil pump is part of that system and the I level before 20-11-500 has not had the software update yet.

If you have had the brake recall performed or your I level has been updated (like I did myself) then an update is not needed.

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[coldtires]

That is to make sure the car has had the brake recall performed (which is a software update). The oil pump is part of that system and the I level before 20-11-500 has not had the software update yet.

If you have had the brake recall performed or your I level has been updated (like I did myself) then an update is not needed.

Oh good thing that's the case then! Thanks for easing my mind with that.

 

[climhazzard]

Oh gosh, thank you so much for the kind words! I honestly wasn't considering it, because I normally make my videos on topics that I truly feel like I have "mastered" so I can speak from experience and share helpful tips.... I will be doing this job for the first time. I'm not even a "Supra Certified" tech yet... but I'll see what I can do maybe just a different style of video. Seems like 3 BMW SSTs are involved and a myriad of "renew" one-time-use bolts, so this truly is brand-new to me as a Toyota tech. But yes, you do have the plastic adjusting ring, so I would definitely plan on this job, or get it covered under warranty ASAP.

Ha yeah BMW (and VW) love their one-time-use/TTY bolts. I doubt Toyota would cover it under warranty preemptively, without any signs of failure ?. I’m not sure if it’ll ever fail given the yearly mileage.

I think the issue here is that Toyota dealerships were never sent a bulletin with the change and superseded revision index like BMW dealers were. You drop off your car for warranty work or order the part, Toyota dealers keep nothing for the Supra in stock, so the parts guy orders the newest part from their warehouse, and you automatically get the updated part that fixes the problem.
The issue affects the earlier cars up to mid-2021. For reference, my build date is 07/10/2020 and is affected. I am outside of warranty - just barely past 60 months of ownership - but to be fair, I wouldn't want anyone else to perform service to my car anyway. Sure most of you can relate.
The part number for the old and new pump are identical (as you can see from the extremely helpful post above this one). What you have to make note of is the revision index (06 and higher is the correct part with the sintered steel adjusting ring), and for my fellow DIY-ers, note that you need a software update as well. I will attach the BMW info in case it helps.

This is the most tangible/‘official’ information I’ve seen posted here or on the BMW forums thus far. A few thoughts…

1. Is BMW outlining two separate types of oil pumps, one with a vacuum pump (11 41 9 895 359), and one without (11 41 8 646 454 index 06+)? A quick check on a BMW parts website confirms this is likely the case. Most G series models have the vacuum pump except a few such as the X5.
2. The model and timeframe overlap between failing oil pumps and the earlier ‘brake booster’ recall Is interesting; vehicles produced with B58TUs between 2019 and early 2020. I’m wondering if there’s a relationship between the two; e.g. the recall addressed a situation where the crank briefly spun backwards thus breaking the vacuum booster. Was that also about the adjusting ring? To be clear, this is 100% speculation on my part. Page 6 of this document provided by the NSTHA has a good summary of the recall.
3. Tied to the above, this is the first I’m hearing of an associated DME update for failing oil pumps. If I’m understanding the document correctly, it is outlining a minimum i-level from 2020. This sort of ties to my point above, and is perplexing.

Sorry for the long write-up, hope that all makes sense.

Edit: I hit reply on this before seeing @razorlab ’s response on the DME update. We’re aligned/great minds, all that.

 

[Faye]

That is to make sure the car has had the brake recall performed (which is a software update). The oil pump is part of that system and the I level before 20-11-500 has not had the software update yet.

If you have had the brake recall performed or your I level has been updated (like I did myself) then an update is not needed.

Exactly.

Ha yeah BMW (and VW) love their one-time-use/TTY bolts. I doubt Toyota would cover it under warranty preemptively, without any signs of failure ?. I’m not sure if it’ll ever fail given the yearly mileage.




This is the most tangible/‘official’ information I’ve seen posted here or on the BMW forums thus far. A few thoughts…

1. Is BMW outlining two separate types of oil pumps, one with a vacuum pump (11 41 9 895 359), and one without (11 41 8 646 454 index 06+)? A quick check on a BMW parts website confirms this is likely the case. Most G series models have the vacuum pump except a few such as the X5.
2. The model and timeframe overlap between failing oil pumps and the earlier ‘brake booster’ recall Is interesting; vehicles produced with B58TUs between 2019 and early 2020. I’m wondering if there’s a relationship between the two; e.g. the recall addressed a situation where the crank briefly spun backwards thus breaking the vacuum booster. Was that also about the adjusting ring? To be clear, this is 100% speculation on my part. Page 6 of this document provided by the NSTHA has a good summary of the recall.
3. Tied to the above, this is the first I’m hearing of an associated DME update for failing oil pumps. If I’m understanding the document correctly, it is outlining a minimum i-level from 2020. This sort of ties to my point above, and is perplexing.

Sorry for the long write-up, hope that all makes sense.

Edit: I hit reply on this before seeing @razorlab ’s response on the DME update. We’re aligned/great minds, all that.

Yes, exactly. Sorry I didn't share the whole document, I just wanted to keep the dealership and my friend anonymous since I am pretty sure this isn't supposed to be shared for public consumption. But I just cropped the dealer info out.... we need this to keep our cars on the road!! Here is the entire document.
Hope this helps!

 

[SupraYYJ]

What you have to make note of is the revision index (06 and higher is the correct part with the sintered steel adjusting ring), and for my fellow DIY-ers, note that you need a software update as well.

Thanks for posting that info from BWW. I hadn't seen it before:

According to that info, the revision index 05/06 distinction isn't relevant to our cars. That part is the 11-41-8-646-454 "oil pump" used in things like the 740i and X7.

The part that matters to us is the "oil vacuum pump", part numbers 11-41-8-646-453 (bad plastic) and 11-41-9-895-359 (good metal).

 

[climhazzard]

Exactly.




Yes, exactly. Sorry I didn't share the whole document, I just wanted to keep the dealership and my friend anonymous since I am pretty sure this isn't supposed to be shared for public consumption. But I just cropped the dealer info out.... we need this to keep our cars on the road!! Here is the entire document.
Hope this helps!

Thanks for the additional info! Interesting that BMW explicitly mentions cold ambient temperatures. I wonder what the actual failure rate is, and if BMW begun replacing these without exhibiting evidence of failure.

 

[garudathree]

f series bmws have been using the plastic oil pump adjustment rings forever, including in the m cars. on the supra there are 3 versions:

plastic ring, plastic vacuum cover (mahle)
plastic ring, metal vacuum cover (omp)
metal ring, metal vacuum cover (omp)

the middle one is the one with issues

 

[afree]

That is to make sure the car has had the brake recall performed (which is a software update). The oil pump is part of that system and the I level before 20-11-500 has not had the software update yet.

If you have had the brake recall performed or your I level has been updated (like I did myself) then an update is not needed.

Did you do the I level update with or without the updated metal pump? Or did you replace it?

Curious if I should get ahead of this as a preventative measure. No issues and works fine. Also don't have the dealer recall DME update. 7/19 build date.

 

[razorlab]

Did you do the I level update with or without the updated metal pump? Or did you replace it?

Curious if I should get ahead of this as a preventative measure. No issues and works fine. Also don't have the dealer recall DME update.

Without, I still have the original pump in the car.

 

[MacAllan30]

Has anyone seen abnormal pressure measurements in BM3 when the oil pump is damaged but still functional?

 

[razorlab]

Has anyone seen abnormal pressure measurements in BM3 when the oil pump is damaged but still functional?

The pump failsafes to high pressure, so if you are seeing abnormally high pressure...

 

[MacAllan30]

The pump failsafes to high pressure, so if you are seeing abnormally high pressure...

So does normal pressures in BM3 exclude pump issue? Thanks razorlab for the info.

 

[razorlab]

So does normal pressures in BM3 exclude pump issue? Thanks razorlab for the info.

Not clear on what you are asking.

Do you just want to know what OEM oil pressure setpoint is when everything is working correctly?

Here you go. It's in hPa to convert to PSI and subtract your ambient pressure depending on how you are logging.

 

[MacAllan30]

Not clear on what you are asking.

Do you just want to know what OEM oil pressure setpoint is when everything is working correctly?

Here you go. It's in hPa to convert to PSI and subtract your ambient pressure depending on how you are logging.

I had the low oil pressure warning come on and was unable to check oil level in the Toyota oil settings. Found this thread and thought it was my oil pump. BM3 oil pressures are normal. I'm out of warranty with miles and mods so cost will be on me. Debating if I need to change out the pump as when I got the 2nd low oil pressure warning it was on for 10 seconds and went away. No CEL and car drives fine. Worried I'm driving on borrowed time or if there's something else I need to look at. Thoughts anyone?

 

[coldtires]

I had the low oil pressure warning come on and was unable to check oil level in the Toyota oil settings. Found this thread and thought it was my oil pump. BM3 oil pressures are normal. I'm out of warranty with miles and mods so cost will be on me. Debating if I need to change out the pump as when I got the 2nd low oil pressure warning it was on for 10 seconds and went away. No CEL and car drives fine. Worried I'm driving on borrowed time or if there's something else I need to look at. Thoughts anyone?

What is your oil pressure (PSI or bar) reading for idle, part throttle, and wide open throttle on BM3?

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