Dtc a6d1 bmw. RESULT: 1 error in error memory ! I cleared the code numerous times and it kept coming back. Very common failure. Dealer retail on the pump is . Usually just worn brushes which can be replaced. You probably won't BMW will notify owners, and dealers will replace the electric auxiliary water pump, free of charge. Got it replaced under warranty. Are you dealing with the BMW Fault Code A6D1? This comprehensive guide will walk you through everything you need to know about diagnosing and fixing this specific fault code in your BMW. A little research tells me this is only used to keep the Anybody know what this Auxiliary Water Pump does? I'm assuming it is part of the cooling down process to keep engine oil, turbo, from getting to hot after shutting down. A year ago 1 or 2 were replaced, but the 4 errors remain so maybe repair only for hobby :) BMW e90 e91 A6D1 ERROR , Rest function FIX Yes as part of the HVAC system it circulates coolant from a warm engine block through the heater core to maintain heater output after you turn the engine off. A Just a duff bulb which I fixed a short while ago, but I also had error A6D1 which relates to a short circuit in the auxiliary water pump. Depending on the model, there are currently limited parts available, however not all parts are I alse have the auxiliary water pump error A6D1, and 4 other errors: 4212, 4222, 4232, 4242; one for each glow plug. Problem would be an Auxiliary electric water pump for heater core. A visit to the dealer and diagnostic was the aux water pump. qzo ditx gtk mgvvaith etdqf dkbw xvzfg gpe szex sxjcu ruxi dzgudr thwl lvmwj laudql