Subaru WRX engine failure problems

Filed Oct 2, 2026 · Engine · CO

On June 24, 2026, my stock 2018 Subaru WRX Limited experienced a sudden catastrophic internal engine failure at approximately 67,319 miles while I was driving. I first heard an intermittent ticking/noise under acceleration. Within about two miles, the noise became much louder, followed by a loud pop, sudden loss of power, and smoke from the engine bay. I was able to get the vehicle stopped safely. I do not recall a warning light or message before the failure. The vehicle was towed to an authorized Subaru dealer. A full engine teardown found catastrophic internal damage concentrated in cylinders/rod bearings 2 and 3, including multiple holes in the engine block, while cylinders 1 and 4 were comparatively intact. The service advisor stated that the damage pattern did not appear consistent with generalized lack of oil and that recent over-revving was not indicated by the vehicle data. An independent inspection on September 17, 2026 confirmed catastrophic internal material failure involving cylinders 2 and 3, crankshaft damage, a deeply gouged cylinder wall, and metal debris associated with the failure. The inspector found no modifications, abuse, commercial use, or outside influence. This sudden loss of engine power and smoke while driving created a safety risk because the vehicle could no longer maintain normal power in traffic and there was concern about further mechanical damage or fire. The failed engine and disassembled components remain available for inspection, along with dealer teardown records, photographs, and the independent inspection report. The vehicle was stock and serviced through authorized Subaru dealerships. The exact initiating cause of the failure remains undetermined.

Filed May 6, 2026 · Engine · NY

Experienced catastrophic engine failure with no known cause. The car had been inspected and had an oil change 3,000 miles prior to the incident. Thankfully, I had already exited the thruway and was on a quiet backroad but if this had happened 15 minutes earlier on the thruway this could have been a much different story.

Filed Apr 9, 2026 · Acceleration, Engine · OR

Car all the sudden stall/ lock up tires at high way speeds due to sudden no warning engine failure causing a massive safety concern My car locked up during a normal drive up a slowly passing a semi when my car died no power steering no engine power transmission locking due engine failure Car was checked and maintenance at the dealer less then a week prior for a small misfire then was dismissed due to car all the sudden running fine so I drove it 100 miles then it died and almost killed me due to the sudden lockup 2017 Subaru wrx WITH THE FA20 DIT Also worth mentioning cars 100% factory stock Car wasn’t terribly damaged, although I was very shaken up from sudden failure into a ditch

Filed Jan 23, 2026 · Engine · CO

At 77,000 miles, my vehicle suffered a major failure where the #2 connecting rod and piston were destroyed, requiring a short block replacement. This repair was performed by Autonation West Subaru in Golden, Colorado and was covered under the SAS gold plan, certified pre-owned 7yr/100,00mi. warranty purchased with the vehicle. According to the technician's report at that time, the failure was so violent it cracked the engine block and contaminated the entire oiling system with metal shrapnel. A short 18,000 miles after receiving the vehicle back at 95,335 miles the clutch went out, needing to be replaced. Keep in mind that this clutch had recently been replaced at 35,757mi. by this same dealership who at the time charged me $900 even though I had just bought the car in July of 2021 with 22,000mi on it. Now, I am at 128,000 miles—only 50,000 miles after the dealership repair—and the engine has failed again. Fortunately, just as I was pulling up to my friend's house, it stalled with an engine code of p0171 present and several dash lights illuminated. And all I've gotten it to do is crank but not start, since early September. In October I had it towed to Subie Smith in Thornton, Colorado. Who did an inspection and compression test, reporting low compression in 2 of the 4 cylinders. And recommended a full engine replacement, either used or new. I don't have the means to afford an engine replacement now out of warranty.

Filed Jun 21, 2025 · Engine · TX

In October 2024, my vehicle, a 2021 Subaru WRX STI, was purchased from a Toyota dealership (Fort Bend Sterling McCall Toyota). The dealership sold the vehicle with an oil issue and a modified ECM. This issue caused catastrophic engine failure while driving. The vehicle stalled and could not be started. Subaru dealership technicians confirmed the cause as improper service leading to catastrophic oil starvation. The failure put both myself and others at risk, as the engine lost power mid-operation on a busy road. The vehicle was towed to a certified Subaru dealership, where it has been detained since December 2024. Despite being under warranty, repairs have been delayed for over 6 months due to blame disputes between the dealership, the manufacturer, and the extended warranty provider. There were no prior dashboard warnings or messages before failure, only loss of power and engine noise at the time of the incident. The vehicle has been fully inspected and documented by the Subaru service center, and all evidence has been preserved. I have been without a primary vehicle for over 7 months.

Filed Jun 11, 2025 · Engine, Transmission · CA

I am filing this complaint to report a serious safety concern involving my 2021 Subaru WRX, which is currently covered under the manufacturer’s powertrain warranty as well as an extended warranty. Subaru of Ontario, an authorized Subaru dealership, failed to properly diagnose or repair ongoing engine issues during multiple service visits. Despite documented problems, the vehicle was released to me in a condition that was unsafe to operate since their location did not have a loaner, fully aware of the issues at hand, exposing me and my family to serious risk while driving. As a result of this negligence, the engine has now deteriorated to the point of needing a full replacement. Subaru of Ontario is attempting to charge me $3,000 for an engine replacement, despite warranty coverage that should fully apply. The dealership has refused to acknowledge their failure in prior inspections or take accountability for releasing an unsafe vehicle back onto the road. I am reporting this as a vehicle safety hazard and potential warranty fraud, as the dealership’s actions directly led to unsafe operating conditions and are now being used as justification to deny coverage. I urge the federal safety agency to investigate both this specific incident and whether this may reflect a larger pattern among Subaru service centers. I am prepared to provide service records, warranty documentation, dealership communications, and supporting evidence upon request.

Filed Feb 2, 2025 · Engine, Fuel system · CO

Excessive blow by contaminating MAP sensors & creating lean/rich conditions. This causes loss of power, stalling and will lead to catastrophic engine failure. EGR system is faulty

Filed Jul 27, 2024 · Engine · AR

I bought a 2018 Subaru WRX with 61,000 miles, After driving it 6,000 miles with engine spun a rod bearing, requiring a complete engine replacement. This is a vehicle that in the previous 4th generation of the car, it was recalled for this exact issue. the total repair bill for this fix is $11,720.43. This is on a car with 67,000 miles. 7,000 miles over Subaru's manufacture warranty. After speaking with a few service advisors at Subaru. it is my belief, that this is a known issue with this model.

Filed Mar 27, 2024 · Engine · WA

Engine rod knock at 32,000 miles due to bearing failure causing loss of control of vehicle and sudden loss of power and control. Car was logged to be traveling at 35 mph with normal acceleration at time of failure. Carter Subaru confirmed bearing failure, and fits with the pattern confirmed in 2012-2017 WRX STi engine failure class action settlement, as part in 2018 remains unchanged from 2017 according to mechanics. Head mechanic at dealership confirmed that only car modification (intake) would not cause catastrophic loss of oil leading to bearing failure, and thus it is likely due to engine design that leads to poor oil circulation as a known issue in this EJ25 engine type. Engine components have been inspected by Carter Subaru, and have been made available to Subaru of America, along with images, videos, pictures, receipts, logs, records, computer/ECU data, receipts, tool purchases, and other maintenance and service logs for the car (including prior to ownership). Dealership acknowledges that the car maintenance exceeded the manufacturer recommendation, yet engine still failed even with oil changes done at 3,000 mile intervals... While manual states much higher interval to follow. Engine still failed at increased oil change levels. Problem appeared once engine started knocking, which means the engine has already suffered irreversible engine failure and needs to be replaced, according to Subaru. Subaru of America assigned a customer advocate but has been incommunicado for the duration of the investigation and refuses to answer or even acknowledge that a claim has been opened, as they constantly cite erroneous interactions with the vehicle owner.

Filed Mar 7, 2024 · Engine, Transmission · GA

Severe engine failure! Was driving steady speed on highway, then I let off the throttle and heard a bad knocking noise on deceleration. The engine oil temp increased to around 230F. I slowed down to limp it to the next exit and it started jerking. I made it to an exit and the engine stalled at the red light. No smoke, oil level good, coolant level good. Had it towed to Subaru dealer, where they said the engine has severe damage and needs a Short Block Engine Assembly. Warranty was denied because it has a cold air intake. Complained to Subaru Corporate because an intake should not cause catastrophic engine failure at only 38,000 miles.