2017 BMW 430i Coolant Tube Repair - now a recall

****Update**** - If you don't find any leaks, but coolant is just low, an even simpler problem is the coolant reservoir cap. Just had this happened to ours as well. I had to pressure test the system to verify, but it was just the cap/o-ring that had a very slow leak. ****

** second update 12-2-2022 **
This is now a RECALL ITEM. If this happens to your car, or hasn’t happened yet, the dealer will replace this hose free of charge. 😁 **

I'm sorry for the poor filming skills and that I filmed it in portrait. I think the information is more than worth it if you have this problem though. This is my first video. I couldn't find any other videos on repairing this car and wanted to save some of you the hours I spent looking for this @#$%^ hose.

This shows how to easily replace a broken coolant tube from the expansion or reservoir tank to the cylinder head. It's on a 2017 BMW 430i Convertible that lost all its coolant suddenly when the 17-12-8-677-244 coolant hose or tube, superseded to 17-12-5-A05-950, broke suddenly at the fitting on the cylinder head. Within seconds it evacuated most of the coolant and the car told my wife to drive easy because the engine was getting too warm. Within a few more seconds it told her to pull over immediately, shut the engine off, and allow it to cool. The coolant temperature gauge never showed anything out of the ordinary.

I'm a little ticked that the hose broke at only 3.5 years old and 60,000 miles on a $45,000 car, but I'm really glad that the engineers thought to put a temperature sensor on the head so it can tell it's overheating even when there is no coolant going past the coolant sensor. As far as I can tell no permanent damage was done to the engine.

additional Tags: 430i coolant leak, 430i coolant loss, 430i overheat

[michaelnewall]

Thank You for posting this. You saved me a lot of time and money. Took my 2017 430i (60k mile) to my repair shop showed him your video and my car was back on the road within 3 hours. Thank you

[deepakgurung]

thanks mate, somehow managed to change the coolant hose, took me a good few hrs, but atlast i managed to do it just by removing the front bracket, saved me few fundred bucks, parts cost was only £ 36.11 here in england, tx a lot mate, keep on posting, cheers

[mjanskid]

Thank you for taking the time to make this video! My 330i wagon blew out at the end of a 7 hour drive from home and the best auto repair estimate was two weeks min. I appreciate it.

[pebsham]

Saved me a small fortune thanks very much from the UK

[mikemarlor]

You are a lifesaver! I found the line broken completely off both end and couldn’t figure out where it attached at the engine. Your video was perfect. Thanks

[jontheroadagain]

My 2018 330i with only 35000 miles just seems to have this problem. Part ordered. 🤞 Thanks for this video.

[JFern]

Thank you for the video, same problem here, as soon as I touched the hose it broke off of both ends! They should really recall this part.

[Kmmaz]

Thank you .. saved me a lot of aggravation .
Had same situation with 2018 430i, lost all coolant and could not figure out where the hell it was leaking until i found the expansion to engine line sitting all by its lonesome but could not see how to get to the engine side until your video . Big help

[kathykrahn]

This just happened to my 2018 430!. Thank you so much for the help and very easy to follow video. We're about to tackle this job. Hope that's all it was and nothing bigger.

[brianrenner]

Happened to my car last night (2017 430i GC); was hunting for it and it snapped at both ends.. thank you for letting me know there's a recall on it, I'mma press'em to get them to give me the oil change, too!

[theonlyoned]

By far the best how to video. Had my wife watch video so she could fix her own car. Yeah, I made her fix her 2019 430i grand coupe. She makes me fix my vehicles and BMW wanted 912 dollars to do this. Guarantee she buys American next time. Part was only 33 dollars

[josiahkissinger]

Thank you for the video! 2017 330i - line broke just like yours did. You saved me a lot of time and money!

[Tolerance-cghz]

Just wanted to say thank you for this excellent video. Saved me fortune and me more confident on fixing my own car.

[MrUshas]

Same problem here - F31 330i 2016 60k miles - 100k km. Thanks for sharing!

[Mike-jttg]

This video is awesome, wondering how much a shop should charge to fix it?
Ie 3 hrs labour to pressure test, fix the issue and then add new coolant?

[chippp]

Thank you for this video, literally saved me time and money. Took me 20 mins to replaced. Bmw said it's pretty common when I called to order the part. 2018 330i

[ssmessia]

Thank you so much for this video! Saved me a ton of time and money on my 230i that had the same failure

[CarlosMartinez-sqqy]

Thanks for the video, it help me with my 2017 430i. I like the pointers and the explanation it made the repairs easy.

[mabbvjones]

Sir. Great video. I have been going crazy trying to figure out how to get 2 the end of the tube in the middle of the engine. You are a life saver. Thank you so much for posting this video. Greatly appreciated!

[barrydorsey]

Great job can you tell me all the tools required and sizes?