Screen wash reservoir repair


On some models the bracket holding the screen wash reservoir can make a hole in the plastic. This makes the bottle leak.

This procedure is the cheap way to solve the problem of the leaking wiper-reservoir, it consumes a bit of time but saves you a lot of Euros! . Good luck !

Tools required

  • Philips screwdriver
  • Saw
  • Sikaflex 291 (costs about £10-£14 for a 310ml tube)


Remove left front wheel (driver’s side)

  • Remove black plastic wheel arch liner. There are 5 screws.
  • Three are on the rear side of the arch

  • The remaining two are on the forward side of the arch.
  • Then the arch can be removed by bending it carefully.

  • Remove reservoir including the bracket, by undoing one screw (high up near the shock tensioner)
  • and one bolt visible at left front holding the bracket

Detach hose and wire from reservoir motor

  • Slide off the bracket from the reservoir (the place holding the bracket is the problem-area)

  • Remove a part of the bracket, so you get more space to work on the problem-area, the part that has to be removed is 1,5 cm wide

  • When the part is removed, undo the sharp edges, and smoothem them with sandpaper.
  • Using an old toothbrush you can clean the problem-area aswel as the bracket, there may not be any grease or dirt be left!
  • Use a towel for drying the parts.

  • Fill the problem-area of the reservoir with ‘SIKAFLEX 291¹, this is a adhesive sealant and bedding compound specially developed for extreme use in wet conditions (watersports, boats, etc.) Available in any good watersports-shop for boating equipment
  • Slide the bracket gently back on to the reservoir until it ‘clicks¹ (not all the way back!)

  • Then apply more ‘SIKAFLEX 291¹ all arround the bracket, and smoothen it with a wet finger until it seals every spot where the bracket and reservoir join

Allow the whole thing to dry out for at least 2,5 hours, then work your way back again to put it all together on your car.

This technical guide was originally held at It was copied to this site in 2021 to ensure its availability and to reformat it into a more modern layout. The original guide was written by Tjaco Bokkinga

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