Factory replacement LEFT SIDE Aluminum Rear Trailing Arm. This is the lightweight aluminum trailing arm that was introduced on the 2006 GP's and is standard on the 2007+ R56/55/57 models. 

Left side is the drivers side and right side is the passenger side in USA model MINIs.

Fits the following models:

2002-2006 MINI Cooper and Cooper S Hatchback
2008-2014 R55 MINI Cooper and Cooper S Clubman
2009-2015 R57 MINI Cooper and Cooper S Convertible
2012-2015 R58 MINI Cooper and Cooper S Coupe
2012-2014 R59 MINI Cooper and Cooper S Roadster

Factory replacement RIGHT SIDE Aluminum Rear Trailing Arm. This is the lightweight aluminum trailing arm that was introduced on the 2006 GP's and is standard on the 2007+ R56/55/57 models. 

Left side is the drivers side and right side is the passenger side in USA model MINIs.

Fits the following models:

2002-2006 MINI Cooper and Cooper S Hatchback
2008-2014 R55 MINI Cooper and Cooper S Clubman
2009-2015 R57 MINI Cooper and Cooper S Convertible
2012-2015 R58 MINI Cooper and Cooper S Coupe
2012-2014 R59 MINI Cooper and Cooper S Roadster