Mishimoto Baffled Oil Catch Can — N55 335i/135i 2011-2013

What separates this kit from generic catch cans is the depth of application-specific engineering. Mishimoto designed a dedicated CNC-machined lid with port sizing matched to the inner diameter of the factory CCV hose, so flow characteristics are preserved without adapters or jury-rigged fittings. The included direct-fit hoses require no modification to the engine cover or internal air diverter, and the purpose-built mounting bracket positions the can in a clean, accessible location that makes draining and servicing straightforward.

Unlike heated air-oil separator systems that drain collected blow-by back into the oil pan, this catch can traps contaminants permanently — including low-octane oil vapors and fuel residue you absolutely do not want recirculating through your engine. That distinction matters on a performance application like the N55, where maintaining proper octane levels and a clean intake tract has a direct impact on how the engine breathes and how reliably it performs over time.

Mishimoto has earned a strong following in the BMW community by building components that are genuinely engineered rather than just rebranded, and this catch can reflects that standard. Installation is bolt-on for any 2011–2013 335i, 335xi, or 135i, and every kit is backed by Mishimoto's Lifetime Warranty — making it one of the highest-value preventive maintenance upgrades available for the N55 platform.