Hi everyone,
I had oil changed on my 2006 X5 E53 and after the oil change, I noticed a leak. I went back to the mechanic but he tried to convince me that it's the power steering leaking. I came home and put clear plastic under the truck and next morning I saw a puddle of yellow water like liquid, went back to the mechanic with a sample of the liquid and then he said it's the coolant leaking and it would require the hose and sensor replacement.

My question is, why and how can a simple oil change result in coolant leaking? Why do I need to change the sensors? Is there an easy fix for it. Would it really be the coolant? it's my first BMW and I'm pretty anxious about this unforseen problem.

I'd appreciate your help and advice.
Fam

The likely cause and effect would be that the leak was already there and was puddled on top of the under engine stiffening plate. It it's the lower radiator hose it has a temp sensor built into it and not meant to be swapped though it's a likely leak source : the o-ring can be replaced if that is the leak.

I installed the bimmerfix stent to solve a severe coolant leak.
Then I installed a new upper rad hose 2 days ago.
Probably installing a new water pump next week.
And a new tensioner pulley.
Then I need to do a complete coolant flush and replacement.
...and an oil change.
Also going to replace the front passenger power window mechanism.
And I'm trying to figure out how to fix my main instrument cluster.
Also trying to get my remote keys to work again.
And I need to repair my exterior tailgate release button
...transmission feels a little rougher than normal too
...power steering pump has a lot of oil around it and its hoses

Jeebus... why am I keeping this truck again? ;-P

I hope your bimmerfix stent solution works better than mine did. Ended up redoing with the AGA pipe after a few months.:(

As far as key reprogramming goes, I've only had success while doing it intoxicated. :rofl: (Crystalworks knows what I'm talking about)

I also just fixed my passenger front window regulator and now my driver's front is starting to make a grinding noise. :swear: It never ends!

Suggest you start a new thread. IMO the intention of this thread is to let other forum members know what repairs, maintenance, mods we have done/completed on our vehicles.

Amen brochacho. Amen. Still trying to get that rear o2 to stop throwing CEL. :rofl: Maybe I should drink first and then work on it...

@cw: I have been dealing with post cat O2 errors all year I think I'll start a new thread and maybe we can all get them fixed finally.


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Installed the suspension refresher from ECS tuning and tomorrow heading to the stealer to do the four wheel alignment. Hopefully, they give a good loaner vehicle:dunno:

I’m afraid to take mine. What’s the stealer gonna charge you

We have a very good suspension place in town charges $100 to align my x5


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