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for me, latest factory software flash, and fixing a leak at an intercooler connection fixed all idle and lag issues. this latest factory software a couple of months ago. they did a nitrogen leak test to find the leak.
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2011 135i DCT
Space Gray Metallic | TR Motorsports 17x8 ET40 Wheels | Koni Yellows | FMIC | Charge Pipe | MHD Stage 1 | Riken Raptor 245/40ZR Tires
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