I've repaired the rear wiper motor twice. Lots of rust in it but had it thoroughly cleaned, painted and lubed. New cogwheel and new seal. Failed within a few months, every time. The water pathway design, as elegant as it may be, is a liability.

Ended up sourcing a used motor from the breakers in excellent condition. I just rarely use the water jet anymore, unless absolutely necessary. Even though it all works just fine. I take advantage of any dew or rain for the occasional wipe and that's it.

Another happy customer here.

My rear washer had been leaking for ages but I just didn't think it worth the £400+ I had been quoted to get it repaired.

Followed these instructions to the letter. The internals of my motor assembly were not too rusty and cleaned up beautifully. The whole solution works really well.

Big thanks to alanm_3 for documenting this fix, and RRUK for detailing the removal and refitting of the wiper and motor assembly. (yes, the rear wiper really does need to hang at 6 o'clock for the rear spoiler to re-attached - finally dawned on me after about 4 attempts!)

RRG

A huge thank you from me too alanm_3. Repair worked perfectly and didn’t need to take the spoiler off either.
Update on screws, No 6 x 1/4” or 3.5 x 6mm
[https://www.ebay.co.uk/itm/175814536384?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=LYuiiNSLSVq&sssrc=4429486&ssuid=2JYqbGJyRCC&var=&widget_ver=artemis&media=COPY]
Is the water jet supposed to just blast off the inner spoiler or have I dropped something?

I just tapped my banjo out without drilling. Using the body of a socket screwdriver. The plastic is soft enough to pop the 4 'rivets' through the holes easily. No need to drill if you don't want to.

I also found that the 16x10x4 oil seal left a gap in the banjo.
So I ordered some 16x10x2.55 hydraulic seals to pop in before the oil seal.

Leaves everything flush, and the oil seal now has help from a hydraulic seal for a few pence more.

The banjo only needs to be secured to prevent it moving with the wiper, so I used some epoxy to secure it.
No leaks and <£10


Hydraulic seal.
https://www.123bearing.co.uk/seals/seal/hy...2.55-nbr90

Rotary shaft seal
https://www.123bearing.co.uk/seals/seal/ro...0x16x4-nbr