Used Mercedes-Benz ML Power Steering Pump

It depends on the generation. The first-generation ML (W163, 1997–2005) and second-generation ML (W164, 2005–2011) use a hydraulic power steering pump driven by the engine. The third-generation ML (W166, 2011–2019) switched to electric power steering on most variants, meaning those cars have no hydraulic pump at all, so if you drive a W166 you are likely looking for a different component entirely — confirm with the breaker what system your specific registration uses.

Unlikely without verification — the 2004 ML is a W163 (first generation, 1997–2005) while the 2006 ML is a W164 (second generation, 2005–2011), and these are completely different platforms with different hydraulic systems. You should match the pump to the correct generation rather than assume cross-generation fitment works. Always confirm against your registration with the breaker before ordering.

Yes, engine size can influence the pump specification, as larger or more powerful engines may run different hydraulic pressures or use a physically different pump. When sourcing a used pump, give the breaker your exact engine code alongside the generation — not just the displacement — to make sure they match the right unit. Never assume all engines within a generation share the same pump.

Trim level does not affect the power steering pump — Sport, Avantgarde, or standard designations are cosmetic and comfort distinctions that have no bearing on the hydraulic steering system. What matters is the generation (W163 or W164) and the engine variant, not the trim badge. You may find cosmetic differences on parts stripped from Sport cars, but the pump itself will be the same specification.

Both sit within the W164 generation (2005–2011), but the diesel ML320 CDI and petrol ML350 may use different pump specifications due to differing engine demands and pressures. Being in the same generation is a good starting point, but you should give the breaker both the engine codes and let them confirm whether the part numbers cross-reference before buying. Do not assume same-generation automatically means direct interchange across different engines.

Findapart connects you with UK vehicle dismantlers (breakers) who specialise in used Mercedes parts — simply enter your registration so breakers can identify your exact generation and engine variant. Because the W163 and W164 are older platforms, used pumps from breakers are often a cost-effective alternative to new or remanufactured units. Always confirm the pump matches your engine code with the breaker before purchase, as fitment can vary within a generation.