Replacing brake pads and rotors on a 2019 Subaru Outback is a crucial maintenance task that ensures the safety and performance of your vehicle. Worn brake pads can lead to reduced braking effectiveness, while warped or damaged rotors can cause vibrations and noise. By following these comprehensive step-by-step instructions, you can confidently replace your brake pads and rotors, saving time and money while enhancing the driving experience of your Subaru Outback.
Before embarking on this project, gather the necessary tools and materials, including new brake pads, rotors, brake cleaner, caliper piston tool, torque wrench, and a jack and jack stands. Safety should be your top priority, so wear protective gloves and eyewear throughout the process. Additionally, consult the service manual for your specific model year to ensure accurate torque specifications and any necessary precautions.
To begin the replacement process, elevate the front end of the vehicle using a jack and secure it with jack stands. Remove the lug nuts, lift the tire off the hub, and place it securely in a designated area. Next, remove the caliper bolts, carefully lift the caliper off the rotor, and support it with a piece of wire or bungee cord to prevent strain on the brake line. Using the caliper piston tool, compress the piston back into the caliper housing. Now, slide the old brake pads out of the caliper bracket and remove the caliper bracket bolts to access the rotor. Lift the old rotor off the hub, clean the hub surface, and install the new rotor. Follow these steps in reverse order to reassemble the components, ensuring proper torque specifications on all bolts and nuts.
Safety Precautions and Tools Required
Safety Precautions
- Park your car on a flat, stable surface.
- Deactivate the engine and wait for it to cool down.
- Engage the parking brake to prevent the car from moving.
- Place wheel chocks behind the wheels opposite the ones you’ll be working on (e.g., if you’re working on the front brakes, place chocks behind the rear wheels).
- Wear safety glasses and gloves to protect yourself from debris and harmful chemicals.
- Avoid breathing in brake dust, as it can be harmful to your health.
- If you have any existing medical conditions, consult with your doctor before attempting this repair.
- Always follow the instructions in your vehicle’s owner’s manual when performing repairs.
Tools Required
| Tool | Use |
|---|---|
| Floor jack | Lift the vehicle |
| Jack stands | Support the vehicle while it’s raised |
| Lug wrench | Remove the lug nuts |
| Tire iron | Loosen and remove the lug nuts |
| Caliper bolts/pins | Remove the caliper from the rotor |
| C-clamp | Compress the brake piston |
| Brake cleaner | Clean the brake components |
| Torque wrench | Tighten the lug nuts and caliper bolts/pins to the correct specifications |
Jacking Up the Vehicle and Removing the Wheels
Safety Precautions
Before beginning any work, ensure your vehicle is parked on a flat, stable surface and that the parking brake is engaged. Place wheel chocks behind the wheels opposite the side you’ll be working on.
Materials Required
- Jack
- Jack stands
- Lug wrench
- 19mm socket wrench
- Anti-seize lubricant
Steps
- Locate the jack points: Refer to your vehicle’s owner’s manual for the designated jack points. These points are typically located near the wheels.
- Position the jack: Place the jack at the designated jack point closest to the wheel you’ll be replacing.
- Lift the vehicle: Slowly pump the jack to lift the vehicle until there is approximately 6-8 inches of clearance between the ground and the tire.
- Put the jack stands in place: Locate the designated jack stand points, which are usually near the jack points. Place the jack stands under these points and lower the vehicle onto them.
- Remove the lug nuts: Using the lug wrench, loosen but do not remove the lug nuts on the wheel you’ll be working on.
- Remove the wheel: Grip the wheel firmly and pull it straight towards you to detach it from the hub.
Removing the Brake Calipers
To remove the brake calipers, you’ll need to remove the bolts that are holding them in place. These bolts are typically located on the back of the calipers, and you’ll need a socket wrench to remove them. Once the bolts are removed, you can carefully lift the calipers off of the rotors.
Be careful not to damage the brake hoses when you’re removing the calipers. If you need to, you can use a bungee cord to tie the calipers up out of the way.
Once the calipers are removed, you can inspect the rotors for wear. If the rotors are worn, you’ll need to replace them. To do this, you’ll need to remove the caliper mounting brackets, which are located on the back of the rotors. Once the caliper mounting brackets are removed, you can slide the rotors off of the wheel hubs.
To install the new rotors, simply slide them onto the wheel hubs and tighten the caliper mounting brackets. Then, reinstall the calipers and tighten the bolts. Finally, bleed the brakes to remove any air from the system.
Here is a table summarizing the steps for removing the brake calipers:
| Step | Description |
|---|---|
| 1 | Remove the bolts that are holding the calipers in place. |
| 2 | Carefully lift the calipers off of the rotors. |
| 3 | If necessary, use a bungee cord to tie the calipers up out of the way. |
Replacing the Brake Pads
Now that the caliper is off of the rotor, you can remove the old brake pads. Typically, one of the pads is held in place by two clips while the other slides in between those clips. Remove the clips to free the held-in pad. The other pad should now slide out freely.
Before you install the new brake pads, it’s important to clean the caliper and the area surrounding where the brake pads make contact with the rotor. This will ensure that there is no dirt or debris that could cause the brake pads to wear unevenly or become contaminated.
Use a brake cleaner or rubbing alcohol and a clean rag to wipe down the caliper and the area around where the brake pads make contact with the rotor. This will ensure that the new brake pads have a clean surface to mate with.
You can now install the new brake pads. The new brake pads will have a small shim on the back. This shim is designed to reduce noise and vibration. Make sure that the shim is properly seated in the caliper.
Slide the new brake pads into the caliper. The brake pads should fit snugly into the caliper. If the brake pads are not fitting snugly, you may need to use a C-clamp to compress the caliper.
Once the brake pads are installed, you can reinstall the caliper. Tighten the caliper bolts to the specified torque. The torque specifications for your Subaru Outback can be found in the vehicle’s owner’s manual.
Replacing the Brake Rotors
1. Gather Your Materials
- New brake rotors
- Brake cleaner
- Brake caliper grease
- Floor jack and jack stands
- Lug wrench
- 13mm socket
- 15mm socket
- T50 Torx socket
- C-clamp
2. Prepare the Vehicle
- Park the vehicle on a level surface and engage the parking brake.
- Loosen the lug nuts on the front wheels using the lug wrench.
3. Remove the Wheel
- Use the floor jack to lift the front end of the vehicle and place jack stands under the designated jack points.
- Remove the lug nuts and take off the wheel.
4. Remove the Brake Caliper
- Locate the two bolts holding the brake caliper to the steering knuckle.
- Use the 13mm socket to remove the bolts.
- Swing the caliper up and out of the way, but be careful not to strain the brake line.
5. Remove the Old Rotors
| Type of Rotor | Removal Method |
|---|---|
| Floating Rotor | Slide the rotor off the hub using your hands or a pry bar. |
| Integrated Bearing Rotor | Unbolt the rotor from the hub using the 15mm socket. |
6. Install the New Rotors
- Clean the contact surfaces of the hub and the new rotors with brake cleaner.
- Lightly grease the contact surfaces between the rotor and the hub.
- Use your hands or a pry bar to slide the new rotor onto the hub.
- Tighten the bolts to the specified torque using the 15mm socket.
7. Reinstall the Brake Caliper
- Swing the brake caliper back into place and line it up with the holes on the steering knuckle.
- Install the two caliper mounting bolts and tighten them using the 13mm socket.
- Reattach the wheel and tighten the lug nuts using the lug wrench.
8. Repeat for the Other Side
- Repeat steps 3-7 for the remaining front wheel.
9. Bed in the New Rotors
- Drive the vehicle for a few miles at varying speeds to allow the new rotors to bed in.
- Avoid hard braking during this period.
Inspecting the Brake Lines and Components
Inspecting the Brake Lines
Start by visually inspecting the brake lines for any signs of damage, such as cracks, leaks, or bulges. If you find any issues, it’s important to replace the affected brake line immediately. Next, check if the brake lines are properly connected to the calipers and master cylinder. Ensure that the connections are tight and free of corrosion or rust.
Inspecting the Brake Components
Brake Calipers
Inspect the brake calipers for any signs of leaks or damage. Check the caliper pistons for sticking or binding. If the pistons are moving freely, apply slight pressure to them and ensure they retract smoothly. Also, inspect the caliper mounting bolts for tightness and corrosion.
Brake Rotors
Examine the brake rotors for wear and tear. Measure the rotor thickness using a micrometer or caliper. If the rotors are below the manufacturer’s specified minimum thickness, they should be replaced. Additionally, check the rotors for any signs of grooves, cracks, or excessive rust.
Brake Pads
Inspect the brake pads for wear and thickness. Replace the pads if they are worn down to less than 1/4 inch of material. Check the brake pad backing plates for any signs of cracks or damage. Ensure that the brake pads are properly seated in the calipers and not loose.
| Component | Inspection Points |
|---|---|
| Brake Lines | Cracks, leaks, bulges, connections |
| Brake Calipers | Leaks, damage, stuck pistons, mounting bolts |
| Brake Rotors | Wear, thickness, grooves, cracks, rust |
| Brake Pads | Wear, thickness, backing plates, seating |
Reassembling the Brake System
7. Reinstalling the Caliper and Pads
To reinstall the caliper, guide it back over the new brake pads, making sure that it fits snugly around the rotor. Secure the caliper in place using the caliper bolts, tightening them to the specified torque using a torque wrench.
Inspect the brake caliper pins for wear or damage, and replace them if necessary. Apply a small amount of synthetic brake grease to the pins before reinserting them into the caliper.
Place the brake pads inside the caliper, ensuring that they are correctly positioned and facing the correct direction. Use the supplied anti-rattle clips or shims (if applicable) to prevent noise and vibration.
Ensure that the brake pads are centered on the rotor by pressing on the brake pedal several times. This will help to distribute pressure evenly across the pads and rotor.
Double-check all connections and ensure that all bolts and nuts are securely tightened before moving on to the next step.
| Component | Torque (ft-lbs) |
|---|---|
| Caliper Bolts | 111-148 |
| Caliper Pin Bolts | 25-30 |
Torquing Specifications and Retightening
Tightening the lug nuts to the proper torque is critical for the safety and performance of your vehicle. Refer to your owner’s manual for the specific torque specifications for your Subaru Outback.
Once the lug nuts are tightened, recheck them after driving approximately 50-100 miles. This is especially important after changing the brakes, as the new pads and rotors may need some time to settle in.
Lug Nut Torque Specifications
The following table lists the torque specifications for the lug nuts:
| Lug Nut Size | Torque Specification (ft-lb) |
|---|---|
| M12 | 80-105 |
Lug Nut Retightening
To recheck the torque on the lug nuts, you will need a torque wrench. Follow these steps:
1. Loosen each lug nut slightly using a lug wrench.
2. Use a torque wrench to tighten each lug nut to the specified torque.
3. Double-check the torque on all lug nuts to ensure they are properly tightened.
Road Testing and Verifying Brake Performance
After replacing your brake pads and rotors, it’s crucial to test your brakes and verify their performance before regular driving.
9. Road Testing
**1. Choose a Long, Quiet Road:** Drive a few kilometers on a quiet, low-traffic road to break in your new brakes gently.
**2. Slow Down and Stop:** Gradually apply the brakes at speeds ranging from 30 to 60 km/h and bring your car to a complete stop. Repeat this process several times to bed in the pads effectively.
**3. Apply Brakes Hard:** Once the brakes are bedded in, perform several hard stops from higher speeds. This will generate heat and remove any excess resin from the brake pads.
**4. Avoid Hills:** Test your brakes on flat roads initially to minimize the risk of overheating due to constant braking.
**5. Check for Vibration or Noise:** Pay attention to any vibrations or unusual noises during braking. These could indicate an alignment issue or other underlying problem.
**6. If Needed, Repeat:** If you notice any issues during the road test, pull over safely and repeat the bedding-in process on a different road.
10. Verifying Brake Performance
**1. Stopping Distance Test:** Perform a braking distance test on a designated test site. Measure the distance required to bring your car to a complete stop from a designated speed (e.g., 60 km/h).
**2. Pedal Feel Test:** Pay attention to the feel of the brake pedal. It should be firm and responsive, without excess sponginess or stiffness.
**3. Visual Inspection:** Inspect the brake pads and rotors for any signs of excess wear or damage. If necessary, make any adjustments or replacements as needed.
| Symptom | Cause | Solution |
|---|---|---|
| Vibration or pulsation during braking | Warped rotors | Replace or machine the rotors |
| Squealing or grinding noise | Glazed or worn brake pads | Replace the brake pads |
| Spongy or soft brake pedal | Air in the brake lines | Bleed the brake lines |
Additional Tips for Troubleshooting and Maintenance
1. Inspect Your Brake Fluid Regularly
Your brake fluid is responsible for transferring pressure from your brake pedal to your calipers. Ensure its level and change it according to the manufacturer’s recommendations to maintain optimal braking performance.
2. Check Your Brake Lines for Leaks
Brake lines carry brake fluid from the master cylinder to your wheels. Regularly inspect them for any cracks, leaks, or damage. If you detect an issue, have it addressed immediately to prevent brake failure.
3. Monitor Your Brake Rotor Thickness
Over time, your brake rotors will wear down. Measure their thickness regularly using a caliper or micrometer. If they fall below the manufacturer’s specified minimum thickness, replace them to ensure safe and effective braking.
4. Clean and Lubricate Brake Components
Dirt and debris can accumulate on brake components, affecting their performance. Periodically clean your calipers, pads, and rotors with brake cleaner and apply a small amount of high-temperature brake grease to moving parts to ensure smooth operation.
5. Test Drive After Replacing Brake Components
After replacing any brake components, take your vehicle for a test drive. Listen for any unusual noises or vibrations and ensure that your brakes are performing as expected. If you notice any issues, consult a qualified mechanic.
6. Consider Upgrading Your Brakes
If you regularly tow heavy loads or engage in spirited driving, consider upgrading your brakes with performance-oriented pads and rotors. These upgrades can provide increased braking power and heat dissipation.
7. Avoid Excessive Braking
Frequent or hard braking can prematurely wear down your brake components. Brake smoothly and anticipate stops to reduce unnecessary friction on your pads and rotors.
8. Maintain Proper Tire Inflation
Underinflated tires can increase braking distances and put additional strain on your brake system. Ensure your tires are inflated to the correct pressure as specified in your vehicle’s manual.
9. Have Your Brakes Inspected Annually
Regardless of your driving habits, it’s recommended to have your brakes inspected annually by a qualified mechanic. They can identify any potential issues early on and prevent costly repairs.
10. Brake Fluid Flushing
Brake fluid absorbs moisture over time, which can compromise its performance. Flushing your brake fluid every 2-3 years removes the contaminated fluid and restores the system’s efficiency, ensuring proper brake function and extending the life of brake components. Consider the following steps when flushing your brake fluid:
| Step | Description |
|---|---|
| 1 | Gather the necessary tools and materials, including brake fluid, tubing, and a brake bleeder wrench. |
| 2 | Start with the brake caliper furthest from the master cylinder. |
| 3 | Attach a section of tubing to the bleeder valve and the other end to a clear container. |
| 4 | Have an assistant slowly depress the brake pedal while you open the bleeder valve. |
| 5 | Close the bleeder valve once the old fluid is expelled. |
| 6 | Repeat the process for all four calipers, starting from the furthest point away and working your way closer to the master cylinder. |
| 7 | Check the brake fluid level in the master cylinder and top it up as needed with fresh brake fluid. |
| 8 | Pump the brake pedal several times to distribute the new fluid through the system. |
How To Change Brake Pads And Rotors 2019 Subaru Outback
Changing the brake pads and rotors on a 2019 Subaru Outback is a relatively straightforward process that can be completed in a few hours with the right tools and a bit of mechanical know-how. Here’s a step-by-step guide to help you get the job done:
- Safety first! Park your car on a level surface and engage the parking brake.
- Loosen the lug nuts on the wheel you’ll be working on, but don’t remove them completely.
- Use a floor jack to lift the car and place a jack stand under the designated jack point.
- Remove the lug nuts and take off the wheel.
- Locate the caliper bolts and remove them. Carefully lift the caliper off the rotor and support it with a bungee cord or wire.
- Remove the old brake pads and inspect the caliper and brake components for any damage or wear.
- Clean and lubricate the caliper slide pins and any other contact points.
- Install the new brake pads and make sure they fit snugly into the caliper.
- Reattach the caliper and tighten the caliper bolts to the specified torque.
- Install the new rotor and tighten the lug nuts to the specified torque. (Replace the rotor if it’s worn or damaged.)
- Lower the car and torque the lug nuts to the specified torque.
- Repeat steps 2-11 for the other three wheels.
- Pump the brake pedal several times to seat the new pads and rotors.
- Test drive your car and listen for any unusual noises or vibrations. The brakes should feel responsive and smooth.
