SKU: 23661210857

BAFFLED OIL SUMP I BMW N55 F2x I F3x I M135i I M235i I 335i I 435i

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Description

BAFFLED OIL SUMP I BMW N55 F2x I F3x I M135i I M235i I 335i I 435iIts well documented that the N55 engine found in the M135i I M235i I 335i I 435i is prone to oil starvation issues when pushed hard on the road and even more so when used on track. If you're ever planning to use your car on track, or even particularly hard road driving, this really is an essential upgrade. Total engine failure is a very real possibility if not. Ask us how we know.! The problem is especially pronounced under hard braking, when the oil

It’s well documented that the N55 engine found in the M135i I M235i I 335i I 435i is prone to oil starvation issues when pushed hard on the road and even more so when used on track.

If you're ever planning to use your car on track, or even particularly hard road driving, this really is an essential upgrade. Total engine failure is a very real possibility if not. Ask us how we know....!

The problem is especially pronounced under hard braking, when the oil pools at the front of the oil pan under the lateral g-force, allowing the pick-up to run dry. Even a fraction of a second of no oil feed can be enough to do lasting damage to your engine, any longer and it's almost certain to lead to engine failure. And that's where this Baffled Sump comes in.

The MMR Performance Baffled Sump has been extensively engineered from the ground-up to provide effective oil control, reducing surge and maintaining a more constant oil pressure; it's the ultimate bolt-in solution available to protect your engine's longevity.

Featuring a total of 7 sophisticated one-way oil control flaps and specific baffling, the T-6061 anodised MMR sump baffle has been tested over thousands of miles of track and road use where the data we collected has proven its effectiveness, plus highlighted that it's baffles correct the worst surge problems under hard braking.



Unlike other solutions available that require a plate to be welded in, the MMR solution is simply bolted into place making the addition of the baffle considerably easier and more accessible to install.

Fitment really is an absolutely essential insurance policy for any hard-driven N55 car.



Note: For reference, normal idling pressure when warm is 1.5 bar.

 

1 Series  F20/F21 2011 - 2019 M135i N55
2 Series  F22/F23

2013 - 2020
M235i N55
3 Series F30/F31

2011 - 2019
335i N55
4 Series F32/F33

2013 - 2020
435i N55

 NOTE: Does not fit x-Drive Models.

Shipping Notes
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 23661210857

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4.9 ★★★★★
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Clint
Birmingham, US
★★★★★ 5
Works perfect for BMW S63 engine.
I used this to change the oil on my BMW M8 with the S63 engine. It was a perfect fit. It extended far enough onto the filter housing to be quite secure with no risk of slipping off and stripping the housing. It was snug on the housing and did not bind up due to having a loose fit. The tool feels well-built and I suspect it will outlive me given my occasional personal use. It would still probably hold up well even for daily shop use as long as it was not abused (repeatedly dropped, slammed around, etc).
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 8, 2025
C
Verified Purchase
Chad altenbach
Los Angeles, US
★★★★★ 5
Made well and great fit
Fits perfectly and is made well
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Reviewed in the United States on May 8, 2026
D
Verified Purchase
Dalia Toppin
Lexington, US
★★★★★ 5
Make sure you know the size
Yes worked like a charm
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Reviewed in the United States on April 5, 2026
M
Verified Purchase
Michael Jozefczak
Charlottesville, US
★★★★★ 5
Great fitment, made changing the oil filter easy
Perfect fit for my m760i oil filter housing.
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Reviewed in the United States on April 24, 2026
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Verified Purchase
Benjamin Tua
Dallas, US
★★★★★ 5
s tier quality
superior quality, single cast aluminum 👍
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Reviewed in the United States on May 2, 2026

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