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F15 n57n engine has 2 exhaust coolers, 1 on the intake and another right after the manifold. For the ones that had the exhaust cooler replaced, which one did BMW replace?
Did BMW do bunch of tests, clean the sot before determining the cooler needs replacing? This is my 3rd time in the shop with CEL in 2 weeks. 1st time, egr sensor replaced, 2nd time solenoid was 'cleaned'... really... now waiting on what BMW will do next... Apparently the shop is following procedures.
Thanks for your help!
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