Mercedes-Benz GLS Washer Pump Replacement Parts

The GLS has been sold in two main generations: the first-generation X166, produced from 2016 to 2019, and the second-generation X167, which launched in 2020 and remains current. Washer pumps are a genuine fitment on all GLS variants, as every version has a windscreen wash system regardless of engine or trim. Parts within the same generation (X166 or X167) are most likely to interchange, but always confirm the exact part number with the breaker against your registration before buying.

A 2018 GLS is a first-generation X166, while a 2021 GLS is a second-generation X167 — these are substantially different vehicles built on different platforms. Mixing parts across this generation boundary is not straightforward, and the pump connector, mounting, and design may differ. Stick to sourcing a pump from the same generation as your car, and confirm compatibility with the breaker using your registration number.

Trim level does not affect washer pump fitment — the wash system is the same across GLS trim grades including standard, AMG Line, and AMG versions within the same generation. You may find minor cosmetic differences in how components are presented at a breaker's yard, but these do not affect whether the pump itself will fit or function. Focus on matching the generation (X166 or X167) rather than worrying about trim.

No — the washer pump is part of the windscreen wash system, which is independent of the engine type, so it makes no difference whether your GLS runs a diesel or petrol engine. Both engine families within a given GLS generation use the same washer pump design. Simply match the generation of the donor car to yours and confirm with the breaker against your registration.

The GLS is fitted with both a front windscreen washer and a rear tailgate washer, and these pumps are typically separate units, though they may share the same reservoir. The front and rear pumps can differ in flow rate or connector layout, so it is important to tell the breaker which one you need — front or rear — when requesting a quote. Confirming this detail against your registration will help ensure you receive the correct pump.

Give the breaker your full registration number and ask them to cross-reference the part number from the donor vehicle against your car's specification — this is the most reliable way to confirm fitment. Within the same generation (X166 2016–2019 or X167 2020-onwards), pumps are generally consistent, but minor running changes can occur during a model's life. A reputable breaker will be able to check this for you before you commit to buying.