The Bilstein B4 OE Replacement 19-119205 is a rear twin-tube, gas-pressure shock absorber for the first-generation MINI Cooper, including the R52 convertible chassis that matches a 2007 Base application. The manufacturer positions the B4 line as an original-equipment-style replacement meant to maintain factory ride quality while meeting or exceeding OE standards. Buyers searching for a 2007 Mini Cooper base rear twin-tube shock, an R52 convertible rear damper, or a Bilstein B4 OE replacement strut will find this exact part number.
Compared with a worn original or a budget unit, the B4 offers gas-pressure damping, which the manufacturer describes as providing steady damping under any load. The B4 is a like-for-like replacement rather than a performance upgrade, so it restores handling balance and ride comfort without a harsh feel. It is backed by the manufacturer's limited lifetime warranty. If your car has lowering springs, check compatibility before buying, because the sources reviewed do not agree on that point. Fitment year ranges also vary across sources, so confirm your car's chassis code and model year with the manufacturer before ordering. Buy one per position, and replace both rear shocks together for even handling.
Published fitment lists vary. Some list the 2002 to 2008 MINI Cooper range, while others list the R52 convertible specifically. The manufacturer should be consulted with your VIN or chassis code before ordering.
Sources disagree on this point. Some state the B4 suits standard or mildly lowered springs, while others advise against lowering springs. Confirm with the manufacturer for your specific ride height before installing.
Each shock is a single rear unit. Replace both rears together so the damping matches on each side.
This is a manageable weekend job for a home mechanic with a floor jack, two jack stands, wheel chocks, and a socket set that includes 17mm, 21mm, and 13mm sockets. Raise the rear, support the car on stands, and take the load off the trailing arm with a jack before removing the large lower bolt, since the shock carries the arm's weight when the car is in the air. Pry out the brake line and ABS sensor grommets carefully at the bracket. The upper mount is held by two 13mm bolts. A spring compressor is only needed if you are transferring springs or rebuilding the assembly. Shocks may arrive partly assembled, so check the hardware and mount seats before installation. Torque all fasteners to the manufacturer's specification, and check for clearance on the brake line after installation.
