2020-2025 Subaru Outback Brake Job Guide: Symptoms, Costs and the Right Parts

By Core Brake Parts Tech Team — Circleville, OH warehouse

A brake job on a 2020-2025 Subaru Outback is ordinary pad and rotor work up front. The rear is where owners get caught out, because the parking brake is electronic. Replace pads (and rotors if they are worn), clean and lube the hardware, and put the electronic parking brake into its maintenance mode before you touch a rear caliper piston. Skip that step and you risk damaging the parking brake mechanism.

How the Brakes Work on This Outback

Every corner of the Outback uses disc brakes: a caliper squeezes two pads against a rotor. The front brakes do most of the stopping, because weight shifts forward when you brake. The rear brakes do less of the stopping but carry a second job, which is the parking brake.

Subaru's 2020 Outback Getting Started Guide describes the Electronic Parking Brake (EPB). You pull the switch up to apply it, the switch light comes on, and PARK shows in the gauge cluster. To release it you press the brake pedal and push the switch down. It also releases on its own when you press the accelerator with the lever in D or R, as long as the doors are closed and your seatbelt is fastened. There is no lever and no cable handle, so the parking brake is applied electrically at the rear.

The same guide covers Auto Vehicle Hold (AVH). It holds the car at a stop after you lift off the brake pedal. It also works with Auto Start-Stop, and the guide says that with AVH the parking brake automatically applies so you can sit at a light without your foot on the pedal. If you use AVH in traffic every day, the rear parking brake gets used far more than it would on a car with a hand lever. That is worth remembering when you look at how the rear pads are wearing.

Subaru's own service bulletins for the earlier Legacy and Outback EPB describe an EPB motor gear unit at the rear wheel. That is why rear brake work on an EPB Subaru involves more than a C-clamp.

Symptoms That Your Outback Is Due for Brakes

• Squealing that stops when you press the pedal. Most replacement pads carry a metal wear tab that scrapes the rotor when the friction material gets thin. It is a warning, not a fault.
• Grinding or a harsh metallic growl. The pad material is gone and the steel backing plate is on the rotor. Stop driving on it. Rotors are almost always ruined at this point, and the caliper can be damaged next.
• Pulsation in the pedal or steering wheel under braking. This usually means uneven rotor thickness or pad deposits on the rotor face. Front rotors are the usual cause when you feel it in the wheel. Rear rotors usually show up as a shudder through the seat.
• Longer stops or a pedal that feels different. Worn pads, glazed friction material, or old moisture-laden fluid can all do this. A soft or sinking pedal is a hydraulic problem and needs inspection before any pad work.
• Brake or parking brake warning messages. Subaru's EPB is monitored electronically. A flashing brake or EPB warning means the system has found a fault, and it is dealer or scan-tool territory, not a pad swap.
• A pedal that feels loose or moves oddly. On early 2020 cars, check the recall in the next section before blaming the pads.

Do not assume the fronts always wear first. Heavy use of the parking brake and hold functions, towing a small trailer, or a lot of slow city driving can wear the rears faster than you would expect. Pull a wheel at each end and look at the pads rather than guessing.

Check the 2020 Brake Pedal Recall First

NHTSA campaign 19V664 covers certain 2020 Outback and Legacy vehicles. The brake pedal mounting bracket may have a missing or insufficiently tightened bolt. According to the recall record, a missing or loose bolt can let the pedal mounting area deform over time, which can reduce braking performance. Dealers inspect the bracket hardware and replace the hardware or the pedal assembly as needed, free of charge. Subaru's own number for it is WUL-97, and the recall began in October 2019.

Check your VIN on the NHTSA recall lookup before paying for brake work on a 2020 model. New pads will not fix a pedal bracket problem.

What a Front and Rear Brake Job Involves

Front brakes

The front job is a standard floating-caliper job. Remove the caliper bolts, hang the caliper so it does not hang from the hose, and pull the old pads and clips. If you are replacing rotors, remove the caliper bracket. Clean rust off the hub face so the new rotor sits flat, because rust there is a common cause of pulsation on a brand-new rotor. Clean and grease the slide pins with a brake-specific lubricant, fit new clips, and push the piston back slowly while watching the fluid reservoir. Subaru's guide shows the brake fluid reservoir in the engine bay on both the 2.5L and the 2.4L turbo engines.

Rear brakes and the electronic parking brake

This is the part that separates an Outback brake job from an older car. Haynes explains that electronic parking brake systems need a maintenance mode before service. It releases the parking brake fully so the rear pads can be changed and the rotor removed. How you get into that mode is not standardized like OBD-II. Some makers need a specific scan tool, and others build it into a dashboard menu. For the Outback, plan on a scan tool that supports the Subaru EPB maintenance function. Do not try to force the piston back against the parking brake mechanism.

The sequence is: enter maintenance mode with the ignition on, confirm the parking brake has retracted, then do the pad and rotor work. Refit everything and exit maintenance mode. Haynes notes that when you exit, the parking brake should run and make noise for a short period as it re-sets itself. After that, pump the brake pedal until it is firm before you move the car.

Torque every caliper bolt and the lug nuts to the values in the factory service manual. Do not guess them.

What to Replace Together

• Pads in axle sets. Always do both sides of an axle together so the car stops straight.
• Rotors when they are scored, lipped, pulsating or below the minimum thickness stamped on them. If you are on a second set of pads, new rotors are usually the better job than resurfacing. Browse replacement brake rotors and brake pads by fitment.
• Hardware. New abutment clips and shims cost little and cure most squeals and clicks. See our brake hardware kits if your pads do not include them.
• Brake fluid. Fluid absorbs moisture over time. A brake job is a good time to flush it, using the fluid grade printed on the reservoir cap and in your owner's manual. Do not mix fluid types.
• Calipers if needed. Replace a caliper that is leaking, has a torn boot, or a seized slide or piston. On the rear, a caliper with a failing EPB motor is a separate diagnosis. Replacement brake calipers are listed by fitment.

For pad material, most Outback owners are best served by a ceramic compound. Akebono, a major OE brake supplier, describes its ProACT ceramic pads as ultra-low dust and engineered to cut noise and vibration. That suits a daily-driven wagon with alloy wheels. Our ceramic brake pads and the Akebono range are good places to start.

What Drives the Cost

The price of an Outback brake job comes down to a few choices:

• Pads only, or pads and rotors. Adding rotors raises the parts cost the most and adds some labor, but it removes the most common cause of comebacks (pulsation and noise on old rotors).
• One axle or both. The fronts and rears rarely wear out at exactly the same time. Measure both before deciding.
• Rear labor on an EPB car. The rear takes longer than an older hand-brake design because of the maintenance mode step. A shop needs the right scan tool, and a DIYer needs to buy or borrow one.
• Add-ons. A fluid flush, hardware, or a seized caliper adds parts and time.
• Doing it yourself. The front job is well within reach of a careful DIYer with basic tools and a torque wrench. The rear is too, but only with an EPB-capable scan tool.

Frequently Asked Questions

Can I change the rear brake pads on a 2020-2025 Outback without a scan tool?

It is not recommended. The electronic parking brake needs its maintenance mode to release fully before the piston is retracted. Forcing the piston back without it can damage the parking brake mechanism. Use a scan tool that supports the Subaru EPB maintenance function.

Why are my rear pads wearing faster than my fronts?

The rear brakes also serve as the electronic parking brake, and Auto Vehicle Hold applies that parking brake automatically at stops. A lot of stop-and-go driving with AVH on, or a sticking rear caliper, can speed up rear wear. Inspect both axles rather than assuming.

Should I replace rotors every time I change pads?

Not always. Replace them if they are scored, have a raised lip, cause pulsation, or measure under the minimum thickness stamped on the rotor. New pads on a worn rotor often come back with noise or vibration.

Is there a brake recall on the 2020 Outback?

Yes. NHTSA campaign 19V664 (Subaru WUL-97) covers certain 2020 Outback and Legacy vehicles for a missing or loose brake pedal mounting bracket bolt. Dealers inspect and fix it free of charge. Check your VIN.

What happens when I take the parking brake out of maintenance mode?

The parking brake re-applies and re-sets itself, and you will hear the motors run briefly. Then pump the brake pedal until it is firm before driving.

What pad type is best for an Outback?

For daily driving, a quality ceramic pad gives low dust and quiet operation. If you tow or drive long mountain grades, pick a pad rated for heavier duty and pair it with good rotors.

Sources

1. Subaru 2020 Outback Getting Started Guide - Electronic Parking Brake operation, Auto Vehicle Hold applying the parking brake, brake fluid reservoir location on 2.5L and 2.4L turbo
2. NHTSA recall data, 2020 Subaru Outback - Recall 19V664 (Subaru WUL-97), brake pedal mounting bracket bolt, consequence and remedy
3. Subaru Service Program Bulletin WTB-63R (via NHTSA) - Subaru EPB uses an EPB motor gear unit at the rear wheel
4. Haynes: Can you service your own electronic parking brakes? - EPB maintenance mode, scan tool requirements, re-set noise on exit
5. Akebono ProACT ceramic brake pads - Ultra-low dust ceramic formulation, NVH reduction, OE supplier