2020 Nissan Pathfinder reported problems

The records describe a possible crash, fire, injury, or loss of control.

“After only 110,000 miles, my local Nissan service center (Advantage Nissan, 5101 Auto Center Blvd, Bremerton, WA 98312) states that the timing chain is loose. The repair estimate is in excess of $6000. The expense is because it requires removal of the engine to effect repairs. Research reveals that timing chain issues at 100000+ miles are common for this vehicle. It is the expectation that the timing chain system last the lifespan of the vehicle. The result is that owners pay more than half of the original price simply for maintenance because of Nissan's choice to use substandard parts in a critical system, a fact they learned with earlier models where timing chain issues and recalls occured. I'm retired and can't afford to maintain this vehicle by spending $6000 every 100000 miles.”

The records describe a possible crash, fire, injury, or loss of control.

“The vehicle has developed a persistent and progressively worsening rattling noise from the engine during cold starts, along with intermittent rough operation. The symptoms are consistent with a malfunction or defect in the engine timing chain system, including possible timing chain stretch, timing chain tensioner failure, or related internal engine components. This condition presents a serious safety concern because the timing chain controls engine valve timing. A failure or severe degradation of this system could result in sudden engine stalling or complete engine failure while driving, increasing the risk of a crash without warning, particularly in traffic or at highway speeds. The issue began as an intermittent startup rattle and has steadily progressed in frequency and severity. No consistent warning lights were present in the early stages, which may delay driver awareness of an impending failure condition. The vehicle has been inspected by a dealership service department, and the concern was acknowledged, but no repair or corrective action has been performed. The condition remains unresolved and continues to progress. Based on owner reports and service feedback for similar vehicles equipped with this engine, this issue appears to reflect a potential widespread defect pattern affecting the timing chain and/or tensioner system in this engine family, rather than an isolated incident. Multiple reports describe similar symptoms occurring around similar mileage ranges, suggesting a possible systemic reliability defect. The vehicle is currently still operable but is operating with a known and worsening engine defect that could result in catastrophic engine failure without warning.”

The records describe a possible crash, fire, injury, or loss of control.

“I own a 2020 Nissan Pathfinder with approximately 55,000 miles. The vehicle repeatedly failed Indiana emissions testing because the oxygen sensor monitor would not set to “ready,” despite multiple complete drive cycles and no check‑engine light or stored fault codes. A local shop performed diagnostics and found no issues. They reported that another 2020 Pathfinder came in the following week with the exact same problem. My vehicle was ultimately sent to a Nissan dealership, where they determined the upstream oxygen sensor had failed in a way that prevented the ECM from running the emissions monitor, yet did not trigger any diagnostic trouble codes. The repair required full sensor replacement at a cost of $1,450, not covered under warranty. The failure mode is concerning because: • The vehicle gives no warning to the driver. • The ECM blocks emissions readiness indefinitely. • The issue appears to be occurring in multiple 2020 Pathfinders. • Owners cannot legally renew registration without passing emissions. This may indicate a defective oxygen sensor or ECM logic issue affecting 2020 Pathfinders. I am filing this complaint so NHTSA can track the pattern and determine whether a broader defect investigation is warranted. Vehicle Details: • Year/Make/Model: 2020 Nissan Pathfinder • Mileage at failure: ~55,000 • No warning lights, no stored codes • Emissions monitor would not complete • Dealer confirmed sensor failure and replaced part Safety Concern: A failed emissions component that does not trigger a fault code may indicate a defect in the emissions control system or ECM logic. The lack of diagnostic warnings prevents owners from knowing there is a problem until the vehicle fails emissions testing.”

The records describe a possible crash, fire, injury, or loss of control.

“My 202 pathfinder started misfiring with sever knocking, Nissan said there is metal saving in my oil which is caused because of the long block engine failure and timing chain loosening. I had my oil changes done every 4K, and I also had the fluids flushed twice in 5 years because of excessive build up. How does this happen.”

The records describe a possible crash, fire, injury, or loss of control.

“On April 7, 2025, the dealership attempted to sell me a vehicle that was experiencing an engine condition running too lean. I declined that vehicle due to safety concerns. On April 8, 2025, the salesperson contacted me again and stated that a different vehicle had been located that would meet my needs. At that time, I was nine months pregnant and urgently needed a vehicle with third-row seating for my children. The dealership was aware of my condition and urgency. I took delivery of the vehicle that day. Unexpectedly, I went into labor the following day and gave birth shortly after. Because of childbirth and medical recovery, I did not immediately operate the vehicle extensively or discover the safety issues. After being discharged from the hospital, around April 11, 2025, I began using the vehicle and discovered serious mechanical problems that made the vehicle unsafe to operate. The vehicle exhibited engine-related issues and a major suspension defect that affected vehicle stability and safe operation. The vehicle was returned to the dealership, where repairs were performed and parts were ordered, confirming that the defects existed prior to or at the time of delivery. Despite the vehicle being driven a significant distance immediately before sale, the dealership did not perform a basic oil change or standard post-delivery inspection. Operating a vehicle under these conditions raises concerns for engine reliability, overheating, and failure. The suspension defect created risk of loss of control, and the engine condition created risk of drivability issues. These conditions posed a safety risk to the driver and passengers, including a newborn child. The vehicle remains available for inspection if requested.”

The records describe a possible crash, fire, injury, or loss of control.

“I have a 2020 Nissan Pathfinder SL with under 70k miles. I had an awful squeal start, upon stopping. I had a private shop say I needed brakes, pads and rotors. And this began the issue. This was in 22-23. It is currently Oct 24, and I have had 3 sets of brakes pads and rotors. When this began the dealership told me my brakes were wearing and near needing replacement. So I had been alerted by them initially. There are zero warning lamps. Vehicle is available for inspection anytime.”

The records describe a possible crash, fire, injury, or loss of control.

“I've replaced both CV axles, all brakes, and had service completed with the wheel hubs. Still get a grinding noise located at the front wheels.”