Mini Cooper Parts Catalog Mini Cooper Accessories Catalog Mini Cooper Technical Articles Mini Cooper Tech Forums
 
  Search our site:    
View Recent Cars  |   Cart  | Project List | Order Status | Help    
 >  >
Rear Control Arm Replacement
 
Bookmark and Share

Pelican Technical Article:

Rear Control Arm Replacement

Nick Czerula

Time:

2 hours2 hrs

Tab:

$150

Talent:

****

Tools:

Pry bar, 16, 18, 24mm sockets and wrenches, floor jack, jack stands, wheel chocks, safety glasses, torque wrench

Applicable Models:

R56 MINI Cooper Hatchback (2007-11)
R56 MINI Cooper S Hatchback (2007-11)

Parts Required:

Rear control arms

Hot Tip:

Replace bolts

Performance Gain:

Repair faulty control arm and prepare vehicle for alignment

Complementary Modification:

Replace in pairs

The MINI R56 rear suspension consists of the following components:

  • Rear subframe. The subframe is bolted to the body and the upper and lower control arms are anchored to it.
  • Trailing arm on each side. The front of the arm is bolted to the body using a bushing and a bracket. The rear wheel bearing is bolted into the rear of the trailing arm.
  • Upper control arm on each side. The inner end of the upper control arm is bolted to the rear subframe. The outer end is attached to the trailing arm above the wheel-bearing opening. A rubber bushing is used at the control arm-to trailing arm attachment point.
  • Lower control arm on each side. The inner end of the lower control arm is bolted to the rear subframe. The outer end is attached to the trailing below the wheel-bearing opening using an eccentric bolt through a rubber bushing. The eccentric bolt is used to set rear wheel camber.
  • Stabilizer bar anchored at the rear subframe and attached via stabilizer links to the rear trailing arms.
  • McPherson coil springs and gas-filled struts mounted to the body and the trailing arm.

Inspect the rubber bushings attaching the trailing arms to the body, the control arms to the rear subframe and the trailing arms, and the subframe to the body and to the differential. These bushings should be solid and lack dry rot. Replace a bushing if it shows signs of failure. You can use a large screwdriver or pry bar to try to move components against the rubber bushing and watch closely for signs of rubber deterioration and looseness.

The rear trailing and control arm bushings connect the rear-trailing arm to the body. It is a trouble area for higher mileage R56 models, as it wears out over time. Replace the control arms if they show signs of failure.

Keep in mind that when your car was serviced before, parts may have been replaced with different size fasteners used in the replacement. The sizes of the nuts and bolts we give may be different from what you have, so be prepared with different size sockets and wrenches.

Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If you're working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Do not work on your vehicle if you feel the task is beyond your ability.

Vehicle models change and evolve as they grow older, so the vehicle shown in our illustrations may vary slightly from yours. If something seems different, let us know and share your info to help other users. Do you have questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

In this tech article, I will go over how to replace the rear control arms on MINI R56 vehicles.

Lift and support the rear of your vehicle. See our tech article on jacking your vehicle.

The upper control arm is located on each side in the same position (top green arrow).
Figure 1

The upper control arm is located on each side in the same position (top green arrow). The inner end of the upper control arm is bolted to the rear subframe (red arrow). The outer end is attached to the trailing arm above the wheel-bearing opening (yellow arrow). A rubber bushing is used at the control arm-to trailing arm attachment point. The lower control arm (lower green arrow) is located in the same position on each side. The inner end of the lower control arm is bolted to the rear subframe. The outer end is attached to the trailing arm below the wheel-bearing opening using an eccentric bolt through a rubber bushing. The eccentric bolt is used to set rear wheel camber.

Support the wheel hub or brake rotor with a jack stand (red arrow).
Figure 2

Support the wheel hub or brake rotor with a jack stand (red arrow).

Upper control arm: Working at the trailing arm, counterhold the 18mm nut (red arrow) while removing the 16mm bolt (yellow arrow).
Figure 3

Upper control arm: Working at the trailing arm, counterhold the 18mm nut (red arrow) while removing the 16mm bolt (yellow arrow). Remove the nut from the control arm (inset).

Upper control arm: Next, remove the subframe bolt.
Figure 4

Upper control arm: Next, remove the subframe bolt. You will have to access the bolt via a cutout in the subframe (red arrow) just behind the fuel tank (yellow arrow). Follow the control arm (green arrow) to the correct bolt.

Upper control arm: Working at the trailing arm, counterhold the 18mm nut (green arrow) while removing the 18mm bolt (red arrow).
Figure 5

Upper control arm: Working at the trailing arm, counterhold the 18mm nut (green arrow) while removing the 18mm bolt (red arrow). Remove the bolt from the control arm through the hole in the subframe near the fuel tank.

Upper control arm: Using a pry bar (red arrow), lever the control arm out of the trailing arm.
Figure 6

Upper control arm: Using a pry bar (red arrow), lever the control arm out of the trailing arm.

Upper control arm: Remove the control arm from the vehicle.
Figure 7

Upper control arm: Remove the control arm from the vehicle. Install the new control arm into the vehicle and install the subframe fasteners finger tight. Then install the fastener at the connection to the trailing arm. Load the suspension to normal ride height using a floor jack and tighten the subframe fasteners. Have the vehicle professionally aligned.

Lower control arm: Working at the trailing arm, mark the location of the eccentric adjuster (red arrow).
Figure 8

Lower control arm: Working at the trailing arm, mark the location of the eccentric adjuster (red arrow).

Lower control arm: Loosen the 16mm fastener (red arrow) while counter-holding the 24mm 12 point adjuster (green arrow).
Figure 9

Lower control arm: Loosen the 16mm fastener (red arrow) while counter-holding the 24mm 12 point adjuster (green arrow).

Lower control arm: Remove the adjuster with the bolt from the trailing arm (green arrow).
Figure 10

Lower control arm: Remove the adjuster with the bolt from the trailing arm (green arrow). If needed, remove and replace the captured nut (red arrow).

Lower control arm: Next, remove the subframe bolt.
Figure 11

Lower control arm: Next, remove the subframe bolt. You will have to access the bolt via a cutout in the subframe just behind the fuel tank. Follow the control arm to the correct bolt. Working at the trailing arm, counterhold the 18mm nut (green arrow) while removing the 18mm bolt (red arrow). Remove the bolt from the control arm through the hole in subframe near the fuel tank.

Lower control arm: Remove the control arm from the vehicle (red arrow).
Figure 12

Lower control arm: Remove the control arm from the vehicle (red arrow). Install the new control arm into the vehicle and install the subframe fasteners finger tight. Then install the fastener at the connection to the trailing arm. Align the adjuster using your mark. Load the suspension to normal ride height using a floor jack and tighten the subframe fasteners. Have the vehicle professionally aligned.



Bookmark and Share

  Search our site:    

View Cart & CheckOut | Project List | Order Status |  Help    

 

[Home] [Customer Service] [Shopping Cart] [Project/Wish List]
  [Privacy Statement]  [Contact Us] [About Us] [Shipping] [Careers]

Copyright © Pelican Parts Inc. -    DMCA Registered Agent Contact Page

Page last updated: Wed 12/7/2016 02:53:24 AM