How I fixed my BMW washer fluid reservoir leak / O-Ring

My washer fluid leak was where the filler neck meets the reservoir. There was an o-ring that I replaced.
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[@andyb6851]

Those plastic rivets at 1:20 can be removed by just pushing the pins through, I used a very small allen for instance. To reinstall them just push the rivet in first, and then press in that pin.
Thanks for this video, I followed it and fixed a slow leak on my 5 series.

[@leorcid]

In my case, similar to the case in this video, those are aluminum rivets, not plastic ones with a stopper in the middle. I guess I will have to file them off or drill them open. F10 520D.

[@pushbbcp]

I had the same issue in my 2018 X1. Put RainX and Shop Pro from AutoZone and they both leaked out in less than 24 hours. I lived with no washer fluid for a couple of months and came across a post on some BMW forum where the guy said it stopped leaking when he put BMW washer fluid. So I decided to try it and like magic it stopped leaking. The only explanation I have is that the BMW windshield fluid comes as a concentrate. Maybe their water to concentrate ratio makes it thicker? Perhaps? I don't know but I'm sure glad I didn't spend time and money on trying to fix it. It's been a week and I don't see it leaking. I will update this post if it starts leaking again. Worth a try. It was a $6 fix

[@joshuaromero2732]

Have same problem, thanks for the info

[@shayneliburd5043]

My 2006 M5 leaked, mechanic fixed it. My 2015 M5 is leaking, will try to fix myself! Thank you!

[@turbo97semax]

I pushed the center pin on the rivets in, but they can get lost in the fender well so would be good to buy some backups. Also, I put a small amount of vaseline on the o-ring to help it seat and seal. Finally, I put zip ties on the filler neck opening (between the reservoir and fill neck) to "clamp" it tight on to the o-ring. The plastic can fatigue and stretch a little.Not sure how much it helps but it is extra peace of mind.

[@user-ie8ph7js9k]

Thanks a lot 🙏

[@Moazmishariff]

Thanks man

[@rosannarodriguez9444]

Thank you!!!!

[@user-ys7el1cx1s]

Size ring 25mm/2,5mm=25/30mm

[@davidhenning9433]

Do you remember what the thickness of the new o-ring was?

[@SummermoonUK]

7/8 ths.

[@RobinPM100]

my washer fluid (BMW X5 E53) started to leak after I had my BMW serviced in the authorised BMW servis 😂 they exchanged me one front Xenon light + igniting sparks, since then it takes 14 days and my full washer fluid reservoir is completely empty, they fu.ked something up during exchange!!!

[@rhirwin10]

I would guess that a BMW uses metric dimensioned O-rings vs. imperial sized O-rings -

[@marcin3798]

Can you provide the dimensions of the O-ring?

[@Dariusz_Jagielski]

Hey, I have the same washer fluid leak, could you give me the exact dimensions? I am from Europe, I understand that 1inch = 25mm? Which CS or OD dimensions i need?

[@user-ys7el1cx1s]

In size 25mm/2,5mm=25/30mm

[@honorablewiz7447]

Man what happen to the JB 4?

[@AutoDad]

I made a video on it

[@samiulhoque5865]

Where did you buy O ring from?

[@AutoDad]

Local hardware store

[@Kingoum8]

You think it be the same for a 2016 m4?

[@AutoDad]

I am not sure of that

[@DADSGARAGE-ip7th]

God forbid you drive in the rain