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Below is a comprehensive guide to help you through the leaf spring replacement process.

### Tools Needed:
– **Jack and Jack Stands**: Essential for lifting the vehicle securely to access the leaf springs. ensure that the jack is rated for the vehicle’s weight and that the jack stands are placed on solid ground.

– **Lug Wrench**: Used to remove the wheel nuts. A cross wrench or a breaker bar may provide better leverage.

– **Socket Set**: A metric socket set will be necessary for removing bolts. Common sizes for BMWs include 10mm, 13mm, 16mm, and 18mm.

– **Torque Wrench**: To tighten bolts to the manufacturer’s specified torque settings after installation.

– **Pry Bar**: Useful for separating the leaf springs from their mounts if they are stuck.

– **Hammer**: A rubber mallet can help to gently tap out stubborn bolts or components.

– **Spring Compressor (if needed)**: If your vehicle has a coil spring setup, a spring compressor may be required to Safely remove and install the springs.

– **Safety Glasses and Gloves**: Always wear personal protective equipment to protect your eyes and hands.

### Replacement Process:
– **Preparation**:
– Park the vehicle on a flat surface, engage the parking brake, and turn off the ignition.
– Gather all tools and materials needed for the replacement.

– **Lifting the Vehicle**:
– Loosen the lug nuts slightly while the wheels are still on the ground.
– Use the jack to lift the vehicle at the designated jacking points. Once elevated, place jack stands securely under the vehicle to support it.

– **Removing the Wheel**:
– Completely remove the lug nuts and take off the wheel to gain access to the suspension components.

– **Disconnecting the Leaf Spring**:
– identify the mounting points of the leaf spring. Typically, there will be bolts on both the front and rear mounts.
– Using the socket set, remove the bolts securing the leaf spring to the axle and the chassis. Keep track of the bolts and their respective locations.
– If the leaf spring is stuck, gently use a pry bar to separate it from its mounting points.

– **Removing the Old Leaf Spring**:
– Carefully lower the leaf spring from its position. If necessary, tap it gently with a hammer to free it completely. Be cautious of any residual tension or components that may still be connected.

– **Installing the New Leaf Spring**:
– Position the new leaf spring into place, ensuring that it aligns with the mounting points.
– Start by securing the spring to the axle and chassis using the original or new bolts. Hand-tighten them initially.

– **Torque Specifications**:
– Once all bolts are in place, use a torque wrench to tighten them to the manufacturer’s specified torque settings. This information can typically be found in a service manual or online.

– **Reattaching the Wheel**:
– Place the wheel back onto the hub and hand-tighten the lug nuts.
– Lower the vehicle back to the ground and then use the torque wrench to fully tighten the lug nuts in a crisscross pattern to ensure even pressure.

– **Final Checks**:
– Inspect the installation to ensure everything is secure and properly aligned.
– Check for any signs of wear or damage on surrounding components while you have access.

– **Test Drive**:
– Once everything is secure, take the vehicle for a short test drive to ensure the new leaf springs are functioning properly and that there are no unusual noises or handling issues.

### Safety Considerations:
– Always use jack stands when working under a vehicle.
– Never work on a vehicle supported only by a hydraulic jack.
– ensure that all components are torqued to the manufacturer’s specifications to avoid future issues.

By following these steps and using the right tools, you should be able to replace the leaf springs on your BMW 320i E46 3 Touring effectively. Always refer to the vehicle’s service manual for specific details and torque specifications relevant to your model.
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