Mishimoto Aluminum Performance Radiator — E90/E82 335i/135i (Auto)
by Mishimoto
Key Features
- Aircraft-grade aluminum construction with TIG-welded end tanks and fully brazed two-row core
- 25% increase in core capacity and 35% increase in coolant capacity over OEM
- CNC-machined quick-disconnect fittings replace failure-prone factory plastic inlet and outlet connections
- Precision drop-in fitment for 2006–2013 E90 335i and 2007–2012 E82 135i with automatic transmission
- Includes Magnetic Oil Drain Plug with Dowty seal to capture circulating metal particles
- Backed by Mishimoto Lifetime Warranty covering materials and craftsmanship
Product Details
- Brand
- Mishimoto
- Part #
- MMRAD-E90-07A
- Category
- Radiators
- ASIN
- B08CRZTQGK
Check if it fits your BMW
Mishimoto Aluminum Performance Radiator — E90/E82 335i/135i (Auto) — Overview
The Mishimoto MMRAD-E90-07A targets one of the most well-documented weak points on the N54 and N55 platform: the factory radiator's plastic end tanks and connection fittings. On a turbocharged straight-six that already runs warm under spirited driving conditions, those plastic components are a liability — they crack, they fail, and they leave you stranded. Mishimoto replaces the entire assembly with aircraft-grade aluminum, TIG-welded end tanks, and a fully brazed two-row core measuring 23.62" x 13.78" with a 1.57" core thickness, delivering a cooling system that's as durable as the engine it protects.
The performance gains here are real and measurable. Compared to the OEM radiator, this unit offers a 25% increase in core capacity and a 35% increase in coolant capacity — meaning more fluid in circulation and more surface area to shed heat. Whether you're running back roads, a mountain canyon, or a dedicated track day, that added thermal headroom keeps coolant temperatures stable where the stock unit starts to struggle. At 28.3" x 14.9" x 4.1" overall, fitment is exact — no trimming, no adapter fittings, no fabrication required.
Mishimoto also includes a Magnetic Oil Drain Plug with Dowty seal in the box, a thoughtful addition that captures metallic particles circulating through the system and adds a meaningful layer of engine protection beyond just temperature management. The CNC-machined quick-disconnect inlet and outlet connections make installation straightforward and eliminate the guesswork that comes with adapting aftermarket parts to OEM plumbing.
This radiator is built to outlast the car it's installed in, and Mishimoto backs that claim with a Lifetime Warranty covering materials and craftsmanship. For any automatic-transmission E90 335i owner between 2006–2013 or E82 135i owner between 2007–2012 looking to do a proper cooling system overhaul, this is the definitive upgrade — not a stopgap, not a like-for-like replacement, but a genuine improvement over what BMW shipped from the factory.
