Unknown connector at the back of 525i engine

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1
Pure oil in coolant tank
Morning Simon Welcome to the Forum If there is that much oil in the Header Tank it follows that water should be in the sump what is the Dip stick showing I have never seen anything like that before ? by the stains around the top of the header tank it almost looks like it has been poured in there? I have read of unscrupulous buyers distracting owners and pouring oil into header tanks then claiming head gasket failure and offering stupid low price to complete the sale. But thats OTT I doubt the engine would be running well if that much oil is being lost to the cooling system. First I would carry out an oil change if there is water in the oil then you will see it around the oil cap as a creamy residue and definitely in the drained oil. If the drained oil is OK and the Oil Filler Cap clean next step is drain the coolant remove the header and clean it (if possible) with the coolant drained you should be able to check the oil cooler and its seals to the rad Good luck detecting the cause Dave -
14
Help with 2014 X3 RDC and TPMS
I would look at systems like i-Carsoft V3 Foxwell 510, but the best and most comprehensive is ISTA. I have seen all of these on the Bay and Amazon for between £100 and £150 Do a google search for BMW Diagnostic software, Good Luck Dave -
5
4x4 abs ebv dsc failure
If the splice has been repaired properly, there are K-can High (Orange/Green trace) and K-can Low (Green) both need doing then it should clear , I know I have done a few. Then you have the Chassis Can (ICM) which has its own can High and can Low, the DSC has PT-can links High and Low Then common sense dictates you have an issue with other K-can splices there are several in the Main Loom floor level and under the dash I would either check myself or find a another Garage bearing in mind this is the garage that has taken £1000 of your money every time telling you "this will fix it". If you can't be bothered yourself get an Auto Electrician as all your doing is throwing money at it/them. It really isn't that complicated Sorry if that sounds harsh but it's your car and money just go back to your very first post and see the answer/advice given Dave -
14
Help with 2014 X3 RDC and TPMS
Hi Greydog, Thanks for the detailed information. This is very helpful! 😀 Since I am new to this, do you recommend any model around $100 that I could complete with the diagnostic? Many thanks! -
5
4x4 abs ebv dsc failure
Hi Dave manged to spk to someone from the garage today and apparently they've done the dealer splice in the back but the problem is still there less kcan line faults from before but still kcan line faults present I did replace the battery before I took it to the garage and I got someone to register the battery as I was told i needed to do that but after I replaced the battery it was like somethink was draining it and occasionally struggled to start as it had low voltage so we checked the altonator voltage and that was fine
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