BMW E90 Rear Coil Spring Replacement: Step-by-Step Guide

Author: Benjamin

Dec. 11, 2024

Automobiles & Motorcycles

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When it comes to maintaining your BMW E90, replacing the rear coil springs is a task that many owners might eventually face. Over time, springs can lose their integrity, leading to a bumpy ride and compromised handling. To help guide you through this essential maintenance task, we’ve gathered insights from several industry experts.

Understanding the Importance of Coil Springs

According to Joe Hernandez, a veteran automotive technician, "The rear coil springs play a crucial role in your vehicle’s suspension system. They support the weight of the rear end and provide the necessary stability during drives." A failure to replace worn springs can lead to uneven tire wear and affect your driving experience significantly.

Tools and Materials Required for Replacement

Tommy Lee, a professional mechanic with years of experience working on BMW models, emphasizes, "Before you start the replacement process, make sure you have all the tools ready. You’ll need a jack, jack stands, a socket set, and a spring compressor. Having everything prepared can save you a lot of frustration."

Parts Required

In addition to tools, ensuring you have the right parts is essential. Jennifer Smith, an automotive parts specialist, recommends using OEM (Original Equipment Manufacturer) coil springs. "They may cost a bit more but will ensure you maintain the ride quality and safety of your BMW E90," she suggests.

Step-by-Step Guide to Replacing Rear Coil Springs

Now, let’s break down the process of replacing the rear coil springs into manageable steps.

1. Safety First

Always begin by ensuring your vehicle is parked on a flat surface. Engage the parking brake and wear safety gear.

2. Lifting the Vehicle

Use a jack to lift the rear of your BMW E90 and secure it with jack stands. This step is crucial for your safety while working underneath the vehicle.

3. Remove the Wheels

With the rear of the car elevated, use a socket set to remove the lug nuts and take off the rear wheels.

4. Disconnect the Shock Absorbers

Next, you’ll need to disconnect the shock absorbers from the lower control arm. This will allow you to access the coil springs more easily. Make sure to hold the shock while loosening to prevent it from snapping back.

5. Remove the Old Coil Springs

Using a spring compressor is essential here. Attach the compressor to the coil springs and tighten it before fully removing the springs from their mounts. Exercise caution as compressed springs can be dangerous.

6. Install the New Coil Springs

Place the new coil springs in position and gradually loosen the spring compressor. Ensure they are seated correctly to avoid future issues.

7. Reconnect the Shock Absorbers

Once the new coil springs are in place, reconnect the shock absorbers and ensure everything is tightened to the manufacturer's specifications.

8. Reattach the Wheels

Put the wheels back on, and tighten the lug nuts securely. This step helps maintain the integrity of the wheel assembly.

9. Lower the Vehicle

Carefully lower the vehicle back to the ground and double-check all connections and fittings.

Final Thoughts

Replacing the rear coil springs on your BMW E90 can enhance your driving experience significantly. Regular maintenance and timely replacements go a long way in preserving the performance of your vehicle. As John Green, an automotive safety specialist, declares, "Don't ignore worn springs; they can lead to more severe problems down the road."

With this guide, you’re now equipped to take on the challenge confidently. Always remember, if you’re unsure about any part of the process, consulting a professional mechanic is the best course of action.

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