The brake line junction box rusted through. This is a known issue with Subarus of this general era but the 2012 Outback is not on the recall list. Owner noticed brake fluid was getting low, after recently refilling the reservoir. Took the car to a shop and the brake light came on day of. The shop confirmed the brake line junction box was rusted through and leaking. Owner was advised that they were days away from a complete brake failure from a larger leak developing and brake pressure dropping catastrophically. As stated before this is a known issue Subaru recall campaign WQK-47. Looking online has revealed numerous Subaru owners experiencing the same problem.
Subaru Outback brake failure problems
108 of the 9,792 owner complaints about the Subaru Outback describe brake failure, most of them for the 2011 model year.
- owner complaints
- 108
- worst model year
- 2011
- typical mileage
- 80,000
Is there a fix? There are 7 recalls for this area of the car. See below
By model year
Often reported together
Check engine light 6No deployment 5ABS 4Sudden acceleration 3Stalling 3Headlights 3Won't start 2Start-stop 2
What owners say
The brakes failed and could be inspected upon request. My safety and the safety of two other passengers was put at risk because my vehicle rear ended an another vehicle at a red light. The problem has not yet been confirmed or reproduced by the dealership or inspected by the manufacturer, police, insurance representative of others. There were no warning messages, or symptoms of the problem prior to the failure.
Brakes failed completely due to excessive rust / corrosion on brake line junction area. Brake pedal suddenly went to floor and fluid leaked out near right rear quarter of vehicle in-front of right rear tire.
When depressing brakes in driveway pedal went to the floor and brake fluid went all over driveway and car struggled to stop. Upon inspection the junction in picture was heavily corroded and when brake line failed. Supposedly this vehicle was repaired in a former recall that obviously was not a fix.
On June 15th 2026, I was at a red light and the Auto Start-Stop feature shut off the engine. When light turned green, my car lost power and started rolling downhill. During this rolling downhill, the brakes stopped working, I was unable to engage parking brake, and I wasn't able to do anything except find a place to safely use gravity to slow the vehicle down. If the hill was steeper, this scenario could have been deadly. It was so scary, I called 911 for assistance but got lucky I was able to stop the car before there was an accident. It turns out the battery didn't have enough power to allow the vehicle to restart and if this happens when the Auto Start-Stop feature is engage you lose the ability to use the brakes. I spoke to the local dealership and acknowledge that is a problem.
On 05/08/2026 the brakes failed while in a queue at a drive-up restaurant. The car was steered away to a flat part of the parking lot. After a restart the brakes returned to operation and the car was taken to the dealership where the brake line were flushed and the brake fluid replaced. On 05/25/2026 the brakes failed after backing out of an inclined parking space in a parking garage. The car came to a stop when it backed into a concrete wall. The car was towed to the dealer. The dealer inspected inspected the car and reported that the brakes were working as they should.
On Saturday, August 9, 2025, my brakes failed at highway speed. My vehicle's stopping distance was severely increased, forcing me to perform an emergency swerve into the leftmost lane to avoid rear-ending a truck. The maneuver was extremely hazardous, as it occurred in a construction zone with concrete barriers and no shoulder, leaving no safe escape path and endangering myself and others. I confirmed the cause was a catastrophic failure of the four-way brake line union block due to severe corrosion. There were no warning lamps or symptoms prior to the incident; the failure was sudden and total. I found that this defect is difficult to spot during inspections because the part is hidden by a plastic panel. The failed union block and corroded lines were removed and are available for inspection upon request. My research shows this is a widespread issue and the exact failure mode covered by Subaru Recall WQK-47R for 2005-2009 models. This known safety defect persists in the 2010-2014 generation, which is not covered by the recall. Prohibitive dealer repair costs are forcing unsafe workarounds. This defect presents an unreasonable risk to public safety, and I urge the federal safety agency to investigate.
I took my Outback to my local highly respectable mechanic on August 20, 2025 as I needed the oil changed and the concern I had about having to add brake fluid twice in the past 4 months. He inspected my car immediately and he refused to let me drive it out of his shop as there is a dangerous brake line leaking issue that could result in brake failure. He told me that my Outback is not the first that he had to repair this “Subaru manufacturing defect”. I had to get it repaired. I checked to see if there was a the federal safety agency recall on my Outback year and there was none, only prior years. Yet when I went online searching more, I found an article that stated that Subaru was going to recall the 2012 Subaru as well? The repair shop owner said to us that my wife is a "gentle driver" and that was good, because, if she had to apply the brakes very hard to avoid a collision, they probably would have failed. Please understand that I read the recall for previous years of Outbacks and other Subaru models, and my Subaru Outback had the exact same defect. I did contact Subaru of America and they responded that my Outback does not have a recall, only prior years. Unbelievable!!! The exact same make and model with the exact same defect and they just blow me off! I was lucky that we did not reach the point of a serious accident. I hope that the federal safety agency will evaluate my, and I am sure other safety issues with Subaru brakes, and take some action to give other owners the opportunity to make this very serious safety matter right, and avoid an accident. In a related question, can the federal safety agency somehow require auto manufacturers to inspect their vehicles that are still on the road after say 12 years to helpfully provide some safety assurance to the drivers of their vehicles?
I was driving home when my brake pedal went all the way to the floor. Next, I realized I could not stop the vehicle. I was able to pull over and stop. A puddle was pooling under my vehicle by the rear passenger tire. I received no lights or illumination or warning.
While in a Dairy Queen drive-up lane, I stepped on the brake pedal and it went right to the floor. The car did not stop, causing me to hit the car in front of me. When backing away from the car in front, the brakes again failed and I hit the car in back. I moved forward again , swiping the car in front again. The cars were merely feet apart and my car was thankfully moving very slowly. Had I been traveling at a higher rate of speed there could have been serious injuries. Car was taken to an Auto repair shop where the mechanic experienced the same problem with the brake pedal. He says the pedal went to the floor and the car wouldn’t stop. Car is currently at a collision shop where they report that inspection of the brakes is normal. They also report that the brakes worked when they pulled the car into the shop. The car has not yet been moved to the Subaru dealer service department for inspection of the brake pedal. There were no symptoms, warning lights or messages before the incident and there were none found by the shop after. My car was built in the same time frame as those involved with Recall #19V664000 which involves the brake pedal mechanism although my VIN was not included. The car is available for inspection. I initially received a ticket but it was dismissed after the repair shop owner reported the same failure.
Related recalls
Service brakes, hydraulic: pedals and linkages
- What is wrong
- Subaru of America, Inc. (Subaru) is recalling certain 2020 Outback and Legacy vehicles. The brake pedal mounting bracket may have a missing or insufficiently tightened bolt.
- Risk
- A missing or loose bolt may cause the brake pedal mounting area to deform over time, which can reduce braking performance and increase the risk of a crash.
- Remedy
- Subaru will notify owners, and dealers will inspect the brake pedal mounting bracket hardware and replace the hardware or brake pedal assembly, as necessary, free of charge. The recall began October 1, 2019. Owners may contact Subaru customer service at 1‑844‑373‑6614. Subaru's number for this recall is WUL-97.
Recall number 19V664000 · Recall details
Parking brake
- What is wrong
- Subaru of America, Inc. (Subaru) is recalling certain 2010-2014 Subaru Legacy and Outback vehicles equipped with a manual transmission. The electronic parking brake (EPB) may not engage as intended, allowing the vehicle to rollaway if the transmission is not in the proper gear when parked.
- Risk
- A vehicle rollaway can increase the risk of a crash.
- Remedy
- Subaru will notify owners, and dealers will replace the EPB actuator assembly, free of charge. The recall began July 19, 2019. Owners may contact Subaru customer service at 1‑844‑373‑6614. Subaru's number for this recall is WTV-81.
Recall number 18V626000 · Recall details
Service brakes, hydraulic: foundation components: disc: caliper
- What is wrong
- Subaru of America, Inc. (Subaru) is recalling certain model year 2017 Outback vehicles manufactured June 20, 2016, to June 23, 2016. The affected vehicles may have improperly tightened attaching bolts for the front left and right brake calipers, wheel hubs, and the right stabilizer clamp.
- Risk
- If any of the front brake caliper, wheel hub or stabilizer clamp attaching bolts loosen or detach, the related components would also become loose and may detach possibly making the vehicle unstable and reducing the braking capability. These conditions would increase the risk of a crash.
- Remedy
- Subaru has notified owners, and dealers will inspect the bolts for proper torque, and replace any loose bolts, free of charge. The recall began on August 8, 2016. Owners may contact Subaru customer service at 1‑800‑782‑2783. Subaru's number for this recall is WTE-66.
Recall number 16V576000 · Recall details
Service brakes, hydraulic: foundation components: hoses, lines/piping, and fittings
- What is wrong
- Subaru of America, Inc. (Subaru) is recalling certain model year 2005-2009 Outback and Legacy, 2008-2011 Impreza and 2008-2014 Impreza WRX/STI, and 2009-2013 Forester vehicles, currently, or formerly, registered in Connecticut, Delaware, Illinois, Indiana, Iowa, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, West Virginia, Wisconsin and the District of Columbia. Salt water could splash on the brake lines through a gap in the fuel tank protector, resulting in excessive corrosion of the brake lines. Note that affected vehicles not currently, or formerly registered, in the salt belt states identified above are eligible for repair, at no cost to the customer, upon request.
- Risk
- Brake line corrosion may result in brake fluid leakage. Fluid leakage may result in longer distances being required to slow or stop the vehicle, increasing the risk of a crash.
- Remedy
- Subaru will notify owners, and dealers will test the brake system by depressing the brake pedal and inspecting for brake fluid leaks. If no brake fluid seepage is observed, the affected areas will be rustproofed with anti-corrosion wax. If brake fluid seepage is observed, the brake lines will be replaced followed by rustproofing with anti-corrosion wax. These services will be performed free of charge. The recall began July 2014 and second notifications will run through November 2014. Owners may contact Subaru at 1‑800‑782‑2783. Subaru's recall campaign number is WQK-47. Note: This recall supersedes recall 13V‑110 which applied to certain 2005-2009 Legacy/Outback vehicles. Vehicles that were remedied under the previous campaign still need additional areas rust-proofed.
Recall number 14V311000 · Recall details
Service brakes, hydraulic: foundation components: hoses, lines/piping, and fittings
- What is wrong
- Subaru is recalling certain model year 2005-2009 Outback and Legacy vehicles manufactured from December 2003, through April 2009 and currently, or formerly, registered in Connecticut, Delaware, Illinois, Indiana, Iowa, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, West Virginia, Wisconsin and the District of Columbia. Salt water could splash on the brake lines through a gap in the fuel tank protector, resulting in excessive corrosion of the brake lines.
- Risk
- Brake line corrosion may result in brake fluid leakage. Fluid leakage may result in longer distances being required to slow or stop the vehicle, increasing the risk of a crash.
- Remedy
- Subaru will notify owners, and dealers will inspect the vehicles. If no brake fluid seepage is observed, the affected area will be rustproofed with anti-corrosion wax. If brake fluid seepage is observed, the brake lines will be replaced followed by rustproofing with anti-corrosion wax. These services will be performed free of charge. The recall began on May 30, 2013. Owners may contact Subaru at 1‑800‑782‑2783. Subaru's recall campaign number is WQG-43.
Recall number 13V110000 · Recall details
Service brakes, hydraulic: pedals and linkages
- What is wrong
- Subaru is recalling certain model year 2012 impreza sedans and wagons (except wrx/sti models), manufactured from april 21, 2011, through november 15, 2011, and legacy and outback vehicles manufactured from october 17, 2011, through november 23, 2011. These vehicles may be equipped with a brake master cylinder that could malfunction and cause an increase in the amount of brake pedal travel distance required to slow or stop the vehicle.
- Risk
- The driver might misjudge the amount of brake pedal travel required to achieve the desired stopping distance. This could occur unexpectedly and without prior warning, increasing the risk of a crash.
- Remedy
- Subaru will notify owners, and dealers will inspect the brake master cylinder and if necessary, replace it, free of charge. The safety recall is expected to begin during december 2011. Owners may contact subaru at 1‑800‑782‑2783.
Recall number 11V562000 · Recall details
Service brakes, hydraulic: foundation components: master cylinder
- What is wrong
- On certain passenger vehicles, the brake master cylinders may not function properly in ambient temperatures below freezing 32 degrees fahrenheit and lower).
- Risk
- At these temperatures, the brakes may not release after being applied, even when the driver's foot is no longer on the brake pedal. This can occur withour prior warning, possibly resulting in a crash.
- Remedy
- Dealers will replace the master cylinders. Owner notification began march 21, 2002. Owners who take their vehicles to an authorized dealer on an agreed upon service date and do not receive the free remedy within a reasonable time should contact subaru at 1‑800‑782‑2783.
Recall number 02V079000 · Recall details
Questions about the Subaru Outback brake failure
Which Subaru Outback years have brake failure problems?
The model years with the most reports are 2011 (17 complaints), 2010 (10 complaints) and 2008 (9 complaints).
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