335i Engine Hesitation between 2500 and 3000 rpm

Originally Posted by Ilovemycar

Blubaron, may I ask how much this cost, and the time it took? Thanks, PM is fine too, I was just curious . . .

It can run anywhere from $500-$700. My dealer did mine for free due to all of the other problems my car has had with the fuel system. It took them 5 hours...

Well, my problem is back. 5,000 miles since the repair. Same symptoms, no codes. I will let you all know how it goes. Doing the FI cleaner now. If that doesn't work, I will inspect the intakes. Then back to ths charge air seals. Wish me luck.

I'm having the EXACT same issue as originally described in this thread. Hesitation / shuddering at @2,500 rpm in 4th through 6th gears under heavy acceleration. 2008 335xi 6MT, 45,000 miles. The dealer has seen it four times for this issue: performed recall, changed spark plugs / injectors, you name it, it hasn't fixed the issue. After a ride along w/ a service tech a few months ago they observed the problem and changed the injectors / plugs and it helped for a few months but the problem is back.
I'll give the Techron a try and see if that helps. If not, maybe I'll talk to the dealer about the walnut blasting. I purchased the car CPO 18 months ago so maybe the CPO warranty would cover the issue.
Love the forum - this has been helpful as it confirms I'm not crazy and that others have also struggled w/ their dealerships.

I see alot of discussion about the same issue BUT WHAT IS THE ROOT CAUSE AND FIX? You guys posted these issues a while ago so the issue must be fixed now? What was the correct fix?

I have a 2007 BMW 335 and it is doing exactly what you all describe.. sudden jerking in 3rd gear right around 3000 rpm when hard acceleration is taking place. If you depress the accelerator very lightly no issues..


and i have run thru 2 bottle of TECHRON (2 gas fill ups in a row) and still have the issue..

Originally Posted by M106191

I see alot of discussion about the same issue BUT WHAT IS THE ROOT CAUSE AND FIX? You guys posted these issues a while ago so the issue must be fixed now? What was the correct fix?

I have a 2007 BMW 335 and it is doing exactly what you all describe.. sudden jerking in 3rd gear right around 3000 rpm when hard acceleration is taking place. If you depress the accelerator very lightly no issues..


and i have run thru 2 bottle of TECHRON (2 gas fill ups in a row) and still have the issue..

techron will NOT clean the intake valves on a DI engine. the gasoline (and techron) are injected directly into the cylinder, bypassing the valves. the only way to really clean the valves is by mechanically or chemically cleaning the valves from the intake side. this is the walnut blasting that the other posts talk about. you can run techron through a DI engine all day and it will not touch the carbon on the intake valves.

Walnut blasting was the only way to fix mine.