Second Hand Mercedes-Benz ML Fuel Injection Pump

The W163 ML ran from 1998 to 2005, and the W164 replaced it from 2005 onwards, so a 2005 and a 2008 ML are almost certainly from different generations with different engine architectures — a direct swap is very unlikely. The safest starting point is to match on engine code rather than year alone, as the pump follows the engine, not the model year or badge. Give the breaker both registration numbers and let them confirm whether the codes align before you commit.

These are different engines — the ML270 CDI uses a five-cylinder diesel unit while the ML320 CDI is a V6, so the injection pumps are not the same and will not interchange. Always match the pump to the engine code printed on your V5 or obtained via a VIN check, as that is the detail that controls fitment above anything else. A breaker can confirm the exact code match against your registration.

No, trim level makes no difference to injection pump fitment on the ML — Sport, Inspiration, and SE are specification packages covering interior, alloys, and cosmetic features, not engine variants. What matters is your engine code, fuel type, and gearbox type, all of which can vary independently of trim. You may find a pump pulled from a basic-spec ML carries different brackets or sensor connectors depending on what ancillaries were fitted, so confirm those details with the breaker against your registration to avoid surprises.

The W164 generation ran from 2005 to 2011, with a facelift around 2008, so a 2009 car is a post-facelift model. Mechanically the engine codes largely carried across that facelift, meaning the pump itself may well be compatible if the engine code matches, but whether any ancillary or mounting changes were made at the facelift point is something you should confirm with the breaker against both registrations rather than assume. Engine code first — if those match, the breaker can take it from there.

No — petrol and diesel fuel injection systems are completely different in design and function, and parts will not interchange under any circumstances. Always make sure the pump you are sourcing is from a diesel engine if your ML is diesel, and supply the breaker with your engine code to ensure an exact match. Fitting the wrong type of pump would result in the vehicle not running and could cause serious damage.

The most important detail you can supply is your engine code, which you will find on your V5 logbook or via a VIN check — this matters far more than the year or model badge. Also tell the breaker your fuel type and gearbox type, as these can affect which pump variant was fitted. Bear in mind that ECU pairing and immobiliser coding may be relevant once the pump is fitted, so ask the breaker about that aspect before purchasing rather than assuming a used pump will be plug-and-play.