Subaru Ascent fuel smell problems

Filed Jun 25, 2026 · Engine · WV

The front exhaust pipe on my 2022 Subaru Ascent cracked at approximately 77,800 miles. The component is available for inspection. Prior to diagnosis, I noticed a rattle/fluttering noise coming from the undercarriage during acceleration. The problem was confirmed by an authorized Subaru dealership. Subaru has issued TSB 09-106-23 acknowledging this is a known design defect affecting 2019-2023 Ascents, and has redesigned the part to correct the issue. Despite being within the 8 year/80,000 mile federal emissions warranty period, the dealership denied warranty coverage, claiming coverage only applies in California and Maryland. This is incorrect - the federal emissions warranty applies nationwide. The dealership quoted over $1,000 out of pocket for a known manufacturing defect on a 4 year old vehicle. The cracked exhaust pipe poses a safety risk as exhaust fumes can enter the vehicle cabin. I am requesting the federal safety agency to investigate whether Subaru is improperly denying federal emissions warranty claims on affected vehicles outside of California and Maryland.

Filed May 22, 2026 · PA

I am submitting this complaint regarding a known exhaust manifold/flex pipe failure affecting my 2020 Subaru Ascent Touring (VIN: [XXX] ). My vehicle was diagnosed by a Subaru dealership with a “broken flex pipe on the header” causing excessive exhaust noise and exhaust leak concerns. Repair estimate was slightly over $2,000. After researching the issue, I discovered numerous reports from other Subaru Ascent owners describing identical failures involving cracked exhaust manifold welds and failed flex pipe sections. Subaru has also issued TSB 09-106-23 involving exhaust manifold weld cracking and redesigned replacement components for this issue. Symptoms began in the low 70,000-mile range and progressively worsened before formal diagnosis at approximately 83,000 miles. This appears to be a widespread defect involving emissions/exhaust components. Many owners online report loud cold-start exhaust noise, cracked manifold welds, failed flex pipe sections, exhaust fumes/smells, and expensive manifold replacement repairs. My concern is both the widespread nature of the defect and Subaru’s handling of complaints regarding the issue. Initially, Subaru denied assistance because the vehicle has a branded title. After documentation was provided showing federally mandated emissions-related coverage/extensions were active for this VIN regardless of title status, the denial basis changed to mileage. After explaining symptoms began prior to the mileage threshold, Subaru then cited lack of dealership service history after my ownership despite the vehicle being regularly maintained by a local mechanic. I am requesting the federal safety agency review whether this exhaust manifold/flex pipe defect represents a broader reliability and emissions-related defect trend affecting Subaru Ascent vehicles. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Feb 12, 2026 · Engine · 120,000 miles · NC

The contact owns a 2019 Subaru Ascent. The contact stated that while the engine was idling, exhaust fumes entered the cabin of the vehicle. Additionally, immediately after starting the vehicle, there was a loud ticking sound coming from the exhaust system. The vehicle was inspected by the local dealer, and it was determined that the exhaust manifold lines were faulty and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was 120,000.

Filed Dec 26, 2025 · Engine · WA

Vehicle smells of fuel inside the cabin and when parked in the garage. To date the dealer is unable to diagnose the problem. 60k miles

Filed Dec 17, 2024 · Engine · WA

The Y pipe that connects the exhaust from the engine to the turbo charger, has cracks from poor welds. It happened 8-12 months ago we started to notice that during warm up our Ascent would sound real loud then quiet down once it warmed up. We didn’t know there was an issue as there were no lights that came on and we had no loss of power or MPG. The safety issue would be that we finally took the car in once we started to smell exhaust fumes coming from the car that we would start to smell from inside the car. We had to start to air out the car after warming up if we couldn’t immediately drive away once started. We contacted Subaru and they offered a partial credit for a repair but after researching I have seen they have had recalls in the past regarding similar cracked Exhaust manifolds on another model car.

Filed Nov 23, 2022 · Engine, Transmission · CA

Transmission still slipping when accelerating between 20-30mph. Brought car in for recall but it continues to have the same issue. AC stopped working even when leak was fixed. Now smells like exhaust fumes when warming up the car.

Filed Aug 19, 2022 · Fuel system · IN

Pretty much from day 1, Ascent smells of gasoline in the cabin after parking the car either inside or outside, shade or shine, hot or cold, day or night, flat or not surface.. after having parked it. It doesn’t matter if it’s a quick trip or a long one, it can still happen after parking. Fumes come out of the vents up front. The concerning part is we have a toddler, which I suspect the federal safety agency would have an issue breathing in hydrocarbons, let alone any passenger. It doesn’t happen all the time, but when it does it lasts a solid five minutes or so. Mentioned to Subaru at time of CVT recall, not even mentioned they checked it out on my paperwork. I even waited to say anything until our car was broken in and all possible lube/other off-gassing components to stabilize.

Filed Jun 3, 2022 · Engine, Fuel system · WI

When the fan is on there is a strong smell of gasoline in the vehicle. This happens whether the vehicle is in motion OR is idling. The smell of gas fumes is very noticible if the fan for the heater/ac is pulling air from outside the vehicle. When the fan system is re-ciruclating the air from just the cabin, there is no smell. This is a very noticble smell and we have to drive with our windows open. My children are not able to be in this vehicle due to this smell. This is our family vehicle and daily driver. I have to drive this vehicle to work. This vehicle we have called about to multiple dealerships. They want to charge us over $300 dollars, but no one has ever heard of anything like this according to the dealers. The online forums say a completely different story. No warning lights or messages have happened. There has been no change to my gas mileage. We are current on all maintence. We have replaced the cabin and engine air filters, and we have replaced the gas cap to see if this would make a difference. It has not. There is no gas leak to the ground that is noticeable. But there is a faint gas smell in the engine area when the vehicle is running.

Filed May 9, 2022 · Engine, Fuel system · WI

We own a 2020 Subaru Ascent we purchased brand new. A few weeks ago we noticed a faint gasoline smell while at a red light. I thought it was a one time occurrence but it has been happening now every time the vehicle is at idle or stopped. I have read on Subaru owner forums about 2019 to 2021 models having this issue all the way from 2100 miles to almost 90,000 miles. Many customers have had to make multiple trips to the dealership to get charged diagnostic fees and many times they say they can’t smell the problem. I just recently contacted my dealership about this issue and found an old service recall about the low pressure fuel pump and was told to not believe everything I read online. This is the vehicle that my family uses and I’m not sure if this is safe for them to be in and is getting to sound eerily similar to when Ford had the CO problem in their explorer and people were crashing. For the amount I paid for this vehicle and all my service intervals at the dealership and many people having the same safety concern I hope this is investigated and I won’t have to pay for repairs.

Filed Dec 20, 2021 · Lights, Steering · WA

Steering is so sensitive that it exhausted driver. Lane control is exhausting. Transmission looses power, but mechanics say nothing registering. The car smokes on cold start and white exhaust smells terrible. This is worse in summer when transmission is hot. Hatch can’t be left open when camping because it ran my battery dead. There is no lighting at the back of car and front interior lights, LED, time out.