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

## Step-by-Step Guide to BMW E90 Rear Coil Spring Replacement.

Replacing the rear coil springs in your BMW E90 can seem daunting, but with the right tools and instructions, you can perform this maintenance task yourself. This step-by-step guide will walk you through the process of BMW E90 rear coil spring replacement, ensuring that you restore your vehicle’s suspension system to optimal performance.

### Understanding the Importance of Coil Springs.

Coil springs play a significant role in your vehicle’s ability to absorb shocks and maintain ride height. Over time, these springs can wear out due to regular driving and exposure to various road conditions. If you notice a decline in ride comfort or any unusual noises emanating from the rear suspension, it may be time for a BMW E90 rear coil spring replacement.

### Tools and Materials Needed.

Before starting your BMW E90 rear coil spring replacement, gather the following tools:

- Jack and jack stands.

- Socket set.

- Wrench set.

- Spring compressor.

- Safety glasses.

- New coil springs.

- Lubricant.

### Step 1: Safety First.

Begin by ensuring your safety. Park your BMW E90 on a flat surface and engage the parking brake. Always wear safety glasses to protect your eyes from falling debris or snapping springs during the process.

### Step 2: Lift the Vehicle.

Using the jack, lift the rear of your BMW E90 and securely place it on jack stands. Ensure the vehicle is stable before proceeding. .

### Step 3: Remove the Rear Wheels.

Next, you will need to remove the rear wheels. Use your socket set to loosen the lug nuts, and then take off the wheels to gain access to the suspension system. .

### Step 4: Detach the Lower Control Arm.

To replace the rear coil springs, access the lower control arm by disconnecting it. Use your wrench set to remove the bolts securing the lower control arm. This step may require some force, so be patient and persistent.

### Step 5: Compress the Coil Springs.

Before removing the old coil springs, you will need to use a spring compressor. This tool compresses the coil spring, allowing you to safely detach it from the vehicle. Follow the manufacturer’s instructions for the spring compressor and ensure it is securely in place before proceeding.

### Step 6: Remove the Old Coil Springs.

Once the coil springs are compressed, carefully unbolt them from the lower control arm and the upper mount. Gently remove the old coil springs from the suspension assembly. Inspect the components for any signs of wear or damage, as this could necessitate additional repairs.

### Step 7: Install New Coil Springs.

With the old springs removed, it’s time for the BMW E90 rear coil spring replacement. Install the new coil springs by following the reverse order of the removal process. Ensure that the coils are correctly positioned in their mounts.

### Step 8: Reattach the Lower Control Arm.

After installing the new coil springs, reattach the lower control arm securely. Make sure all bolts are torqued to the manufacturer’s specifications to prevent any potential failures.

### Step 9: Reinstall the Wheels.

Put the rear wheels back on and tightly secure the lug nuts. It is crucial to ensure each nut is fastened appropriately.

### Step 10: Lower the Vehicle.

Finally, lower the vehicle from the jack stands and back onto the ground. Take a moment to double-check all connections and fittings to confirm everything is secure.

### Final Thoughts.

Replacing the rear coil springs in your BMW E90 can enhance your vehicle's handling and comfort. This step-by-step guide to BMW E90 rear coil spring replacement will provide you with the necessary knowledge to successfully complete this task. For those who may feel uncomfortable undertaking this job, consulting with a certified mechanic is always a good option. Remember, maintaining your vehicle’s suspension is key to ensuring a safe and enjoyable driving experience.

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