RTC3959 - Water reservoir grommet rubber seal

- €5,20

€5,20

€5,20 - €5,20

€5,20

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OEM: Made by an Original Equipment Manufacturer. This part is made by an original equipment manufacturer or under their license, ensuring compatibility and quality.

Brand Allmakes OE

Water reservoir grommet rubber seal

Vehicle Model Land Rover Defender up to 2016
Land Rover Discovery 1 1989-1998 (L318)
Range Rover Classic up to 1994

Fitment Notes DEFENDER 1987-2006 — windscreen and headlamp washer pump grommet, from (V)AA270227 to (V)WA159806
DISCOVERY 1 1989-1998 — washer pump grommet, from (V)FA393361 to (V)WA799999
RANGE ROVER CLASSIC 1986-1994 — washer pump grommet
Seals the washer pump (ADU3905) into the screenwash reservoir.

Alternative Codes

RTC3959

In stock 23 units

16 · Gouda 7 · Drachten

Express delivery available

When will my order arrive?

Order before 15:00 (Mon–Fri): same-day dispatch for in-stock items.
UPS Express (order before 14:00): dispatched today, delivered tomorrow where available.
Netherlands / Belgium / Germany: 2–4 working days.
Other EU countries + UK: 4–8 working days.
Outside EU/UK: delivery times vary — contact us for an estimate.

Items may ship from multiple warehouses at no extra cost.

Job kits containing this part

This part is included in 0 job kit(s) below. Pick the kit that matches your vehicle and job, then add what you need.

Frequently asked questions

What does the RTC3959 grommet do?

The RTC3959 is a rubber grommet that seals the washer pump into the screenwash reservoir, stopping washer fluid leaking around the pump housing. It fits between the pump body (ADU3905) and the reservoir tank on Defender, Discovery 1, and Range Rover Classic.

How many grommets are needed per washer pump?

One grommet per washer pump. If your vehicle has both a windscreen and headlamp washer pump, each pump needs its own grommet, so check how many pumps your reservoir has before ordering.

Can I replace the washer pump grommet myself?

Yes, this is a simple DIY job. Pull the old pump out of the reservoir, remove the perished grommet, and press the new one into the grommet seat before refitting the pump. No tools are usually needed beyond your hands.

Which vehicles use the RTC3959 grommet?

Defender models from VIN AA270227 to WA159806, Discovery 1 from VIN FA393361 to WA799999, and Range Rover Classic. It's a common part across these washer systems, so confirm your reservoir type if you're unsure.