Here's a general overview of the process. This is NOT a complete, step-by-step guide, and variations may exist depending on specific model and trim level. Consult a repair manual specific to your 2003 Toyota Corolla for detailed instructions and diagrams. A Haynes or Chilton manual is a good investment.
Tools You'll Likely Need:
* Jack and Jack Stands: Absolutely essential for safety. Never work under a car supported only by a jack.
* Wheel Chocks: To prevent the car from rolling.
* Lug Wrench: To remove the wheel.
* Torque Wrench: Crucial for tightening bolts to the correct specifications (found in your repair manual).
* Hammer and Punch: For removing and installing components.
* Socket Set and Wrenches: Various sizes will be needed.
* Press or Bearing Separator: Essential for removing and installing the bearing. A shop press is ideal, but some specialized bearing pullers can work.
* Penetrating Oil (PB Blaster or similar): To help loosen rusted or seized components.
* New Rear Wheel Bearing: Make sure you get the correct part number for your specific Corolla model.
* Grease: For repacking the new bearing.
* Safety Glasses and Gloves: Always protect yourself.
General Steps (Highly Simplified):
1. Safety First: Park on a level surface, engage the parking brake, and chock the front wheels. Raise the rear of the car using the jack and securely support it with jack stands.
2. Remove the Wheel: Remove the lug nuts and wheel.
3. Remove the Brake Caliper and Rotor: Carefully remove the brake caliper (support it to prevent stress on the brake line) and then the rotor.
4. Remove the Axle Nut: This is usually a large nut on the axle. It will likely be very tight, requiring a breaker bar or impact wrench. Mark its position relative to the axle flange before removal.
5. Remove the Axle Flange: This may involve removing some other components, depending on your Corolla's design. Consult your repair manual. You may need to use a puller.
6. Remove the Old Bearing: This is the most challenging part. You will almost certainly need a press or bearing separator to remove the bearing from the axle housing.
7. Clean and Inspect: Thoroughly clean the axle housing to remove any debris or old grease.
8. Install the New Bearing: Use a press or bearing separator to carefully press the new bearing onto the axle. Ensure it's seated correctly.
9. Reassemble: Reinstall the axle flange, axle nut (tightening to the correct torque spec), rotor, and brake caliper. Make sure the brake caliper slides freely.
10. Reinstall the Wheel: Tighten the lug nuts to the correct torque spec.
11. Lower the Car: Carefully lower the car from the jack stands.
12. Torque Check: Recheck all torques after driving a short distance.
Important Considerations:
* ABS Sensor: The ABS sensor may be attached to the axle or hub. Be careful not to damage it during the process.
* Preload: The new bearing will likely need a specific preload. This is crucial for correct operation and longevity. Your repair manual will give the correct procedure and specifications.
* Torque Specifications: Use a torque wrench and follow the torque specifications precisely as given in your repair manual.
* Professional Help: If you're not comfortable with any of these steps, take your car to a qualified mechanic. A poorly installed bearing can lead to serious damage and safety hazards.
This is a simplified overview. Always refer to a repair manual specific to your 2003 Toyota Corolla before attempting this repair. Incorrect procedures can lead to damage to your vehicle or personal injury. If you lack experience, professional help is strongly recommended.
