Fit For

• 2004 - 2007 BMW 525i
• 2008 - 2010 BMW 528i
• 2004 - 2007 BMW 530i
• 2008 - 2010 BMW 535i
• 2004 - 2005 BMW 545i
• 2006 - 2010 BMW 550i

Placement On Vehicle

• Front Left, Front Right

Product Structure

• The shock absorber assembly is composed of shock absorber, lower spring washer, dust cover, spring, shock absorber, upper spring washer, spring seat, bearing, top rubber, and nut.
• The total components of the shock absorber are four parts: front left, front right, rear left, and rear right.
• The position of the lug (the horn connected to the brake disc) at the bottom of the shock absorber is different in each part, so when choosing a shock absorber assembly, be sure to find out which part of the shock absorber assembly is.

The role of shock absorber assembly

• A shock absorber is installed in the suspension (usually in the spring coil) to prevent the rebound phenomenon.
• The function of the spring is to buffer the impact of the ground, while the function of the shock absorber is to limit the excessive elastic force of the spring.

Working Principle

    The shock absorber assembly uses fluid to convert the elastic energy of the spring into thermal energy to optimize the convergence of vehicle motion, thereby eliminating the vibration caused by the road surface, improving driving stability, and giving the driver a sense of comfort and stability.

When should the car shock absorber assembly be replaced?

1. Bouncing test: Press the car at the front or back corner of the car and release it quickly. If the car bounces over, the shock absorber is damaged and should be replaced.

2. The number of kilometers tested: the shock absorber should be checked regularly for 20,000 kilometers, it is recommended to replace the shock absorber for 80,000 kilometers, and the shock absorber must be replaced for 100,000 kilometers.

3. Tire friction: A damaged shock absorber will cause abnormal grooves on the tire surface and uneven wear. The shock absorber should be replaced.

4. Leakage of shock absorber: If the shock absorber leaks oil, the shock absorber should be replaced in time.

Detailed steps for replacement

1. Drive the vehicle into the station and park it correctly. Extend the lift support base into the bottom of the vehicle to ensure good contact between the support base and the support points of the vehicle body.

2. Take away the rain plate and wiper.

3. Remove the tire, and put the removed tire on the ground with the outer side facing up, and place the tire screws on the tool cart. 

4. Remove the screws on the connecting rod,the brake hose screws and the brake ABS cable. After removing the screws, keep and put them in the tool cart. (Note: Be careful not to damage the oil pipe and ABS cable. Do not seperate the brake lines, bleeding of the brake system is required when opening the brake lines.

5. Remove the tire rod using special tool.

6. Remove the vehicle height sensor. Be careful do not damage it.

7. Remove the ball head of the lower control arm. Until now the broken shock absorber assembly has been disassembled.

8. Before install the new shock absorber assembly, compare it with the old one.

9. Install the new one on the ateering knuckle assembly.

10. Assemble the shock absorber assembly and steering knuckle assembly back to the vehicle together.

11. Install back all the stuff you removed. (Note: tighten the tire bolts carefully, remember to debug the wiper.)

12. You can drive the car to check whether the installation is successful.