Three problems related to gas recirculation valve (egr valve) have been reported for the 2011 BMW 335. The most recently reported issues are listed below.
It started may, 2017, when my 335d was idling rough and jerked as I was driving at a slow speed. I took it into crevier BMW in santa ana. The car had 53,000 miles and they said it had carbon build up on the intake manifold and #1 & 5 fuel injector. They replaced the fuel injectors and walnut blast the manifold. Swirl ports, egr and throttle housing cleaned as well. Apr, 2018 58,000 miles, faulty active tank temperature sensor replaced. Aug, 2018 60,000 miles, replaced faulty fuel injectors #2,3,4,5 and faulty cam sensor. Jan, 2019 64,000 car running rough at idle. Started using fuel injector cleaner in fuel tank. This stopped the rough idle. Car runs rough every time if I don't add the injector cleaner. March 2020 73,000 miles, intake manifold removed and walnut blast again. Replaced both faulty nox sensors. Faulty codes on air mass intake. Nov 2020 76,000 miles, faulty fuel injectors # 1,2,4, #5 glow plug, mass/volume air flow, intake temperature sensor. Did not pass smog. Took to dealer and they could not figure out what to repair to get it to pass smog. Very frustrated. . .
I've had to replace the egr module to avoid catastrophic results. . Read more...
Car stalled multiple times while driving. Each time it was a sudden death while driving. Every time got lucky that I was not followed by a truck and no one hit me from behind. Dealer replaced engine earlier, diesel pump and now dealer said reported all injectors failed. History: 1/5/17 - car stalled while in motion on city street - speed 30/hr 3/3/17 - car stalled again while in motion on highway - 50/hr 5/20/17 - check engine light - no stalling 5/31/17 - car stalled - on city street at red light. 2/13/18 - car stalled while driving - speed 50/hr 3/1/18 - car stalled - speed 15/hr - after stopping and starting at red light in city street. Downhill. No break . Started rolling down. Used hand brake. 3/7/18 - car stalled while driving in snow city street - speed 25 /hr repairs: 5/23/17 - egr cooler , injectors replaced 5/31 - 6/18 - car was at dealer and engine, intake manifold replaced. 2/13/18 - diesel pump replaced. 3/7/18 - car is with dealer - reports multiple injector failure.