Why Does This Happen? Modern BMW engines now feature¬†direct injection,which offers advantages in fuel consumption efficiency as compared to conventional port fuel injection. The N54, N55 engine of the 335i, 135i, and 535i are all direct injection; this means in particular that the fuel is injected directly into the combustion chamber of each cylinder and…

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We’ve been doing maintenance on the S54 VANOS system for quite a few years now so we’ve seen the different ways in which these systems can fail. We thought we would take some time to illustrate what we do at the shop to go through the VANOS system and take care of other maintenance and…

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While our S54 rod bearing widening solution is a great way to save engines that have already spun a bearing, we believe the S54 engine will run a long time on stock bearings if the proper maintenance is performed. Oil changes at low intervals along with replacing rod bearings pre-preemptively will lead to a long…

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Recently we had a customer with an E60 M5 come to us with codes thrown for the electronic throttle on his car. Symptoms were the common car would start up from cold but once warm and shut off the car would not pass its own pre-start throttle check and go into limp mode. Rather than…

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