Change Brake Pads on Subaru Outback 2019: A Complete DIY Guide for Safety and Savings
Changing the brake pads on your 2019 Subaru Outback is a straightforward do-it-yourself task that can save you significant money on repair bills, while ensuring your vehicle maintains optimal stopping power and safety. With basic mechanical skills, the right tools, and careful attention to detail, most car owners can successfully replace both front and rear brake pads in a few hours. This guide provides a comprehensive, step-by-step walkthrough tailored specifically to the 2019 Subaru Outback, covering everything from recognizing wear signs and gathering tools to the final brake bedding-in process. By following these instructions, you can achieve professional-level results, extend the life of your braking system, and gain valuable hands-on experience with your vehicle. Always prioritize safety; if at any point you feel unsure, consult a qualified mechanic.
Understanding Your Subaru Outback's Braking System and When to Change Pads
The 2019 Subaru Outback uses a hydraulic disc braking system on all four wheels, with single-piston sliding calipers in the front and either sliding or fixed calipers in the rear, depending on the trim level. The brake pads are the consumable friction material that presses against the rotors to slow and stop your car. Over time, these pads wear down, which reduces braking efficiency and can lead to damage to the more expensive rotors. Recognizing the signs of worn brake pads is the first step. Listen for a high-pitched squealing or grinding noise when applying the brakes, which often indicates that the wear indicator is contacting the rotor or that the pad material is critically low. You might also feel a vibration in the brake pedal or steering wheel, notice that the vehicle pulls to one side during braking, or see that the stopping distance has increased. A visual check through the wheel spokes can also help; the pad material should be at least 1/4 inch thick. If it appears thinner, replacement is due. For the 2019 Outback, the average brake pad lifespan is between 30,000 and 70,000 miles, depending on driving habits and conditions.
Essential Tools, Parts, and Safety Gear You Will Need
Before starting, gather all necessary items. Having everything on hand will make the process smoother and safer. You will need a basic socket set and wrench set, a torque wrench (critical for proper tightening), a C-clamp or a brake caliper piston tool, a lug wrench or impact wrench for removing wheels, a jack and jack stands (never rely on the jack alone), a wire brush or stiff-bristle brush, brake cleaner spray, and a container for small parts. For the brake pads themselves, purchase a high-quality set designed specifically for the 2019 Subaru Outback. Consider ceramic brake pads for quieter operation and less dust, or semi-metallic for enhanced performance. It is often advisable to replace the brake hardware (spring clips, shims, and pins) as a set, as these components ensure proper pad movement and reduce noise. While not always mandatory, inspecting the rotors is crucial; if they are deeply grooved, warped, or below the minimum thickness specification, they should be resurfaced or replaced. For safety, wear protective eyewear and mechanics' gloves to shield yourself from brake dust and sharp edges. Keep a well-ventilated workspace, as brake dust can be hazardous.
Critical Safety Precautions Before You Begin
Working on your vehicle's braking system involves serious risks if not done correctly. Always ensure the car is parked on a level, solid surface like concrete, and engage the parking brake firmly. Before lifting the vehicle, loosen the lug nuts on the wheels you will be removing while the car is still on the ground. Use the factory-recommended jacking points indicated in your owner's manual; for the 2019 Outback, these are typically the reinforced seams behind the front wheels and ahead of the rear wheels. Once the car is lifted, immediately place jack stands under the vehicle's frame or designated support points. Never crawl under a vehicle supported only by a jack. After removing a wheel, place it under the vehicle's side sill as an additional safety block. Brake fluid is corrosive, so avoid contact with skin and painted surfaces. During the process, be mindful that some components may be hot if the car was recently driven. Work methodically and keep your workspace organized to avoid misplacing small but vital parts like caliper bolts or clips.
Step-by-Step Guide to Changing Front Brake Pads on a 2019 Subaru Outback
The following steps provide a detailed, linear process for replacing the front brake pads. The rear brakes may involve an additional step for the parking brake and piston retraction, covered in a later section.
1. Prepare the Vehicle and Remove the Wheel.
Set the transmission to "Park" and apply the parking brake. Loosen the lug nuts on the front wheels about a quarter-turn using the lug wrench, but do not remove them completely yet. Using the jack, lift the front of the vehicle at the recommended jacking point until the tire clears the ground. Place a jack stand securely under the vehicle, then lower the jack slightly so the car rests on the stand. Now, fully remove the lug nuts and take off the front wheel. Repeat this for the other front side if you are doing both wheels. It is often best to work on one side at a time, using the other side as a reference for reassembly.
2. Remove the Brake Caliper.
The caliper is the assembly that houses the brake pads and piston. You will see the main caliper, which is bolted to a bracket. On the 2019 Outback, there are typically two guide pins or bolts that hold the caliper to its bracket. Using the correct socket, remove the bottom guide pin bolt first, then the top one. Carefully lift the caliper off the rotor and brake pads. Do not let the caliper hang by the flexible brake hose, as this can damage the hose. Instead, use a piece of wire or a bungee cord to suspend the caliper from the suspension or frame, keeping the hose slack and unstrained.
3. Remove the Old Brake Pads and Hardware.
With the caliper out of the way, you can now access the brake pads and the mounting bracket. The pads are held in place by the caliper bracket and various metal clips or shims. Note their orientation. Remove the outer pad first, then the inner pad. They may simply slide out or require gentle prying. Take out the retaining clips, anti-rattle springs, and shims from the bracket. Use the wire brush and brake cleaner to thoroughly clean the caliper bracket, removing all rust, dirt, and old brake dust. This ensures the new pads can slide freely.
4. Compress the Caliper Piston.
Before installing new, thicker pads, the caliper piston must be pushed back into its bore to make room. Locate the piston inside the caliper. Place the old brake pad or a small block of wood against the piston, then use a C-clamp or a dedicated piston tool to slowly and evenly compress the piston until it is fully retracted. It is crucial to monitor the brake fluid reservoir under the hood during this step. As the piston retracts, fluid will be displaced back into the reservoir, which can overflow. Use a turkey baster or similar tool to remove some brake fluid from the reservoir if it is near the "Max" line to prevent spillage, which can damage paint. Never reuse this fluid; dispose of it properly.
5. Install New Brake Pads and Hardware.
Install the new metal clips, shims, and anti-rattle springs into the caliper bracket. These components, often included in a hardware kit, reduce noise and ensure proper pad alignment. Then, slide the new brake pads into place on the bracket, with the friction material facing the rotor. Ensure they are seated correctly and that any wear indicators are positioned at the top or as specified. Apply a thin layer of high-temperature brake lubricant to the back of the brake pads (the metal shim, not the friction material) and to the points where the pad ears contact the bracket. This prevents squealing.
6. Reinstall the Caliper and Wheel.
Carefully lower the caliper back over the new pads and onto the rotor, aligning it with the bracket. It should slide on smoothly. Reinstall the two guide pin bolts. These bolts must be torqued to the manufacturer's specification. For the 2019 Subaru Outback front caliper bolts, the torque is typically between 25 and 35 foot-pounds (ft-lbs); consult your service manual for the exact value, as it is critical for safety. Use your torque wrench to tighten them to the proper setting. Once the caliper is secure, reinstall the wheel. Hand-tighten the lug nuts, then lower the vehicle to the ground using the jack. Once the tire is fully on the ground, use the torque wrench to tighten the lug nuts in a star or crisscross pattern to the specified torque, which is usually about 80-90 ft-lbs for the 2019 Outback.
7. Repeat for the Other Side.
Follow the same steps for the other front brake pad replacement. Consistency is key for balanced braking.
Special Considerations for Changing Rear Brake Pads on the 2019 Subaru Outback
The rear braking system on the 2019 Subaru Outback integrates the parking brake mechanism, which requires an extra step. The process for pad removal is similar to the front, but retracting the caliper piston is different. The rear caliper piston must be rotated as it is pushed back in, because of the parking brake actuator. You will need a specific tool, often called a cube tool or a piston winding tool, that fits into the notches on the piston face. After removing the caliper and old pads, place the tool into the piston and turn it clockwise while applying gentle pressure. This will screw the piston back into the caliper. Some aftermarket caliper piston tools have adapters for this purpose. Do not force it or try to compress it with only a C-clamp, as this can damage the internal mechanism. The rest of the installation steps are identical to the front. After reassembly, test the parking brake to ensure it engages and releases properly.
The Crucial Bedding-In Process and Final Checks
After replacing brake pads, a proper bedding-in procedure is essential to transfer an even layer of friction material onto the rotors, ensuring optimal braking performance and preventing warping. Start by driving at a moderate speed (around 30-40 mph) on a clear, safe road. Apply the brakes gently but firmly to slow down to about 10 mph, then accelerate back to speed. Repeat this process 5 to 10 times, allowing about 30 seconds of cool-down driving between cycles. Avoid coming to a complete stop during this process. Then, drive normally for a few miles without heavy braking to let the brakes cool completely. This conditions the pads and rotors. After bedding-in, perform a final safety check. Ensure the brake pedal feels firm and not spongy. Test the brakes at low speed in a safe area to confirm they are working evenly without pulling. Check the brake fluid level in the reservoir and top it off with fresh, DOT 3 or DOT 4 fluid as specified in your manual. Inspect for any fluid leaks around the calipers. For the first 100 miles, avoid aggressive braking to allow the pads to fully seat.
Common Mistakes to Avoid and Troubleshooting Tips
Even with careful work, some errors are common. Overtightening or undertightening caliper bolts or lug nuts can lead to catastrophic failure. Always use a torque wrench. Forgetting to clean the caliper bracket can cause the new pads to stick, leading to uneven wear and overheating. Not compressing the piston before installation will make it impossible to fit the caliper over the new pads. Using the wrong type of brake lubricant or applying it to the friction surface can cause contamination and reduced stopping power. If, after reassembly, the brake pedal feels soft or sinks to the floor, there may be air in the brake lines, requiring a brake system bleed—a more advanced procedure. A persistent squealing after installation might indicate that the hardware was not installed correctly, the pads are not properly lubricated, or the wear indicator is touching the rotor lightly; re-check your work. If the vehicle pulls to one side, verify that the pads on both sides are installed correctly and that the caliper pins are sliding freely.
When to Seek Professional Help and Long-Term Maintenance
While changing brake pads is a manageable DIY project, recognize your limits. If you discover severely damaged rotors, leaking brake fluid, or seized caliper pins, it may be time to consult a professional mechanic. Additionally, if you are uncomfortable with any step, especially those involving the hydraulic system, seeking help is the safe choice. For long-term maintenance, visually inspect your brake pads every time you rotate your tires (every 6,000 miles or as recommended). Listen for unusual noises and pay attention to changes in pedal feel. Have your brake fluid flushed every two to three years, as moisture absorption can lower its boiling point and cause corrosion. Using high-quality parts and adhering to these procedures will ensure your 2019 Subaru Outback's braking system remains reliable for thousands of miles.
By following this detailed guide, you have successfully changed the brake pads on your 2019 Subaru Outback, enhancing your vehicle's safety and your own mechanical skills. Regular maintenance, including prompt pad replacement, protects your investment and ensures confident driving. Remember, a well-maintained braking system is vital for you, your passengers, and everyone on the road.