쇼크업소버 교환PistonHeads★ 신뢰도 4.1 (높음)

BMW X5 수리 사례

2008년식 · E70 (2006-2013) · xDrive30d

2026. 10. 28. 작업

난이도 & 준비물

증상

Good work as usual. I changed to the bigger spring compressors years ago-they make the job so much safer and easier.

처리 내용

Been getting an annoying, intermittent "Increased battery discharge!" warning. The car measures current consumption while parked, with the aim of ensuring "startability" (amongst other things) - if excess current draw is detected, several curcuits are killed and warning is flagged.Tested/swapped battery, charged etc, even swapped the IBS module (M3's was a straight swap, handy having 3x late E-chassis BMW's on the drive) - fault remained.The problem was tricky to reproduce - the warning only came up if the car was driven (for several miles), parked and locked and left for an hour (aka driving to the gym!). If left overnight, it was fine.I tried a parasitic draw test, using a meter to measure current draw - with everything shut down, it was all in-spec.I tried to take a reading immediately after turning off the car off, the reading was over 10A which was beyond the range of my meter(s!), blowing the (expensive) internal fuse. I knew the current would drop quickly and that was what I wanted to measure, so made a test lead - replaced the cars battery/ground cable with two cables, one via a switch and one via the meter. Means I can bypass the meter until the current has dropped to a measurable level.But still - was in spec.Bought a clamp meter and tried that instead, less accurate but allows me to monitor the full shutdown.The allowable current draw isn't a constant value - each part of the car stays on for a certain amount of time after the ignition is switched off (interior lights, iDrive etc) so I ended up visualizing the data to find out.......it's all in spec As it only happened after the engine had been running, I figured it had to be something mechanical - one suggestion was the diodes on the alternator allowing "leakage" out from the alternator. There was also the opposite discussion saying such testing was invalid...I bought a new alternator to compare the readings...There's definitely something different between the two.Swapped the alternator body over - I kep