CSF Dual Pass Transmission Oil Cooler - BMW E9x M3

CSF Dual Pass Transmission Oil Cooler - BMW E9x M3

Marsoni

M251S

$224.50

Get it in 3 business days with 1 day shipping. Friday, May 29

CSF Dual Pass Transmission Oil Cooler - BMW E9x M3Made with CSFs AC condenser technology using a 1 row super high pressure 22mm wide 11 channel microtube Dual pass high performance core with 11 cooling tubes vs. OEM 10 tube design. High density multi louvered fin design with 20% more surface area contact compared to OEM unit. Drop in fit requiring no modifications to install. Accepts all attaching OEM components including oil line connections, mounting brackets, and shroud ducting Lab tested at ~30%

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I bought this as I got a new one month old Roborock 10r. Comparing these with the original, the feeling of the products (the roller brushes, the filter, and the bag) feel the same. These supplies should last six months or so, so the price is good for the value. The tip I will give is when changing the mop, PULL THE EXISTING ONE SLOWLY! There’s cheapish adhesive from the factory and can easily come off the Roborock.

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Reviewed in the United States on May 4, 2025