My dad's X3 28d had originally passed the first recall, as it was low mileage, and then developed the leak later. We were refilling the coolant every 1-2 months. I had a bit of a fight with the BMW dealer, but they eventually re-did the check, and found it leaking. The dealer replaced the EGR cooler and intake manifold on the recall. 16V683000. BMW of North America, LLC. (BMW) is recalling certain model year 2015 BMW X3 sDrive28i, X3 xDrive28i, X3 xDrive35i, X3 xDrive28d, X4 xDrive28i and X4 xDrive35i vehicles, and model year 3 years ago after diesel sensor leak and £10,000+ bill to fix (covered by extended warranty) I asked my dealer if there was a connected issue as 268,000 cars had been recalled for an EGR cooler This document provides the service information for the replacement of the exhaust gas recirculation (EGR) valve and cooler on certain BMW models with N47T and N57T diesel engines. It also explains the symptoms, causes, and warranty coverage of the EGR valve issue. The EGR valve is the main component of the EGR system and it's normally closed. It connects the exhaust manifold to the intake manifold and is controlled by either a vacuum or a built-in electric step motor. The function of the EGR valve is to control the flow of exhaust gas being recirculated depending on the engine load. I managed to gain some live data during the hesitations and this is how it looks like (the blue line is EGR). I checked also some live date from DDE: What I am not sure that is good is the Air Mass values (but I read somehwere it can also be related to bad EGR) and the EGR position activation signal differs from the actual and nominal values. Failing the test is a hassle and you’ll have to get the valve problem fixed anyway. Misfire: Misfiring is a rare symptom of a bad EGR valve, but it can still happen. Very poor EGR valve problems can change the fuel-to-air ratio in the engine so much that it misfires. 9C76 IHKA: Auxiliary-water pump. Most often does come on this code 4501 Exhaust-gas recirculation, control deviation. Car most of time doesn't have the power what it should have especially when code 4501 does come on. When I put throttle all way down revs does go high but car speed very slowly increasing. gtMq.