Mini Cooper R53 W11B16A 1.6L engine for sale

Mini Cooper R53 W11B16A 1.6L Eaton M45 supercharged SOHC Tritec Engine.

Performance power unit, used engine For Sale.

The Mini Cooper R53 W11B16A 1.6L engine is a highly sought-after performance power unit, engineered to deliver the iconic blend of spirited acceleration and moreover engaging driving character that defined the first-generation Mini Cooper S (R53).

 Built on the proven Tritec architecture with a durable SOHC 16-valve head and also an Eaton M45 supercharger system, this engine remains a premier choice for enthusiasts and mechanics alike who need a reliable and performance-ready replacement or upgrade engine for Mini’s classic performance hatch.

With a displacement of 1.6 liters (1598 cc), this supercharged engine enhances the naturally aspirated Tritec design with forced induction, producing approximately 160–170 horsepower and up to 210–220 Nm of torque. 

The Eaton M45 roots-type supercharger paired with an intercooler provides responsive throttle performance and strong mid-range pull, giving the R53 Cooper S its signature brisk acceleration and lively driving feel. This powertrain is especially appreciated by drivers seeking an authentic performance experience with solid everyday usability.

Compatibility, Common weaknesses and Maintenance.

The W11B16A Eaton M45 engine was originally fitted to the Mini Cooper S R53 (model years 2002–2006) and remains compatible with the R53 chassis, matched transmissions, and related engine management systems. This compatibility makes it a direct-fit replacement for worn or damaged engines in R53 Cooper S hatchbacks and a popular choice for rebuilds or performance-oriented projects.

While robust and performance-oriented, there are a few common weaknesses to be aware of when considering this engine. The supercharger belt and tensioner assembly can wear over time, leading to belt squeal, loss of boost, or premature component failure if not inspected and replaced at regular intervals. 

Oil leaks from the valve cover gasket, front crank seal, and oil cooler lines are frequently reported on higher-mileage units and should be checked before installation. Additionally, carbon build-up and throttle body deposits can occur, especially if regular servicing has been neglected.

To ensure long service life and peak performance, consistent routine maintenance is essential. Recommended care includes regular oil and filter changes with high-quality synthetic oil, timing belt inspection, careful examination of the supercharger drive components, and prompt replacement of wear items such as spark plugs, ignition coils, and coolant hoses. 

Addressing minor issues early and maintaining the cooling, intake, and lubrication systems will help preserve the dynamic performance and reliability of this classic Mini Cooper R53 W11B16A 1.6L engine for years of spirited driving enjoyment.