MMR Baffled oil sump MMR20-0501 for BMW N55 F2x & F3x / M135i / M235i / 335i / 435i - MMR20-0501 - 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. The ultimate N55 bolt-in solution available to protect your engine's longevity. 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 our 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; the data we collected has proven its effectiveness, plus guaranteed that the baffled design prevents the oil surge problems once and for all. Product features The ultimate bolt-in baffled sump solution for N55-powered vehicles. 7 sophisticated one-way oil control flaps and specific baffling. Engineered from T-6061 anodised aluminium. Reducing surge and maintaining a more constant oil pressure. Everything you need included in the kit. Fitting informations Series Model Code Year Variant Engine Code 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/F32 2013-2020 435i N55 Does not fit X-Drive models. Additional information 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 F-Series car.