The N55 makes the 2011 335i the smart-money E9x to own — quicker than an E46 M3, cheaper to fix than an N54, and still one of the best-driving sub-$15k coupes/sedans on Earth.
Complaints filed per year (peaked 36 in 2017)
Complaints by system · hover any bar for links to those specific problems
The 2011 335i sedan and coupe got the single-turbo N55; the 2011 335is coupe/convertible kept the twin-turbo N54. N55 = more reliable HPFP, less power potential. N54 = legendary tuner motor, eats HPFPs and injectors.
Full diagnostic menu showing battery state, sensor live data, fuel level in liters, and individual cell voltages — built into the instrument cluster.
Video-in-motion, digital speedo, sport-display gauges, folding mirrors on lock, Apple CarPlay (on iDrive CIC retrofits), and auto-start-stop disable can all be coded on — the hardware is already there.
Roughly 1 in 7 E9x 335is were ordered with the 6-speed manual; the 6MT cars hold value dramatically better and are the enthusiast pick. ZF 6-speed is bulletproof.
The N55 responds insanely well to a piggyback tune and an ethanol blend on stock fueling — biggest dollar-per-horsepower deal in modern BMWs.
M Sport (ZMP) gets the M steering wheel, aero, shadowline trim, and 18" wheels. The cheaper Sport Package gets sport seats and a different suspension. M Sport with 6MT and Premium is the holy-grail spec.
Hold the unlock button on the fob — all four windows and the sunroof drop. Hold lock — they all close. Works from across a parking lot.
Replacing the battery without registering it to the IBS sensor causes premature failure, weird electrical gremlins, and CEL codes. Most quick-lube shops won't do this.
2011 335i sedan or coupe with N55, 6-speed manual, M Sport package (ZMP), Premium package, and a clean service history showing water pump, OFHG, and walnut blast already done. RWD over xDrive unless you live in snow. Dakota leather, no iDrive deletes.
Early-build 2011 335i xDrive sedan with high-pressure fuel pump complaints and no service records, automatic-only commuter cars over 120k with deferred maintenance, and any 335is that's been modified with a backyard tune and no logs — the N54 in those eats parts fast when abused.
Seven recalls touch this car, and most are non-negotiable: a Takata driver-side airbag inflator (do not skip — verify completion), an engine-bay wiring harness chafe that can cause a fire, a front driveshaft CV-joint issue on xDrive models, and a circuit board in the blower module that can overheat. Owner complaints (146 total) cluster around airbags (the Takata fallout), engine issues (oil pressure loss, camshaft bolts, stalling), and fuel system gremlins (sending-unit cracks leaking gasoline into the cabin area — alarming and confirmed by multiple owners). The pattern matches what the forums already know: this is a complicated, electrically-busy car that punishes neglect but isn't a lemon if cared for. Run the VIN at nhtsa.gov before purchase and demand proof every open recall has been closed.