There are 3 owner-reported engine complaints for the 2023 Toyota GR86in NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
A defective set of spark plugs with certain model year 2023 Toyota GR86 to have premature failure. While driving at highway speed spark plug blew up resulting in a cylinder 4 misfire and loss of drivability. The service advisor from the Toyota dealership unofficially confirmed this has happened to multiple other gr86 models. Along with being unofficially confirmed by an aftermarket specialist. Original diagnostic from the dealership was to replace the motor due to all of the issues, while a local certified mechanic has replaced the spark plug, coil pack, and is continuing to troubleshoot as the head gasket also needs to be replaced. No warnings lights or signs were present prior to failure.
The contact owned a 2023 Toyota GR86 Sport vehicle. The contact stated that while driving 139 MPH for a couple of minutes, the vehicle stalled. Several unknown warning lights were illuminated. The contact was able to pull to the side of the road. The vehicle failed to restart and was towed to the dealer, where it was diagnosed that the engine had failed and needed to be replaced. The contact stated that the vehicle was covered under warranty; however, the dealer informed the contact that the repair could not be covered under warranty because the engine failure occurred due to customer abuse. The contact stated that the vehicle was designed with a maximum speed of 140 MPH. The contact was charged a repair fee, and the vehicle was traded for another vehicle. The manufacturer was not notified of the failure. The failure mileage was approximately 33,000.
Oil leak caused from poor/bad spark tube seals Fire Hazard: Oil leaks, especially from hot engine parts, can increase the risk of fire. Oil on the exhaust system or other components can ignite, causing a dangerous situation. Car was brought to dealership for a leak. Oil was found leaking from engine gasket cover from spark tube seals. Toyota only fixes the seals that are found cracked. ALL seals should be replaced as preventative measure. It is a known issue that these seals are bad from various forums. Subaru has a service bulletin SB22-168 related to spark plug pipe gasket leaks. (same engine as their Subaru BRZ)
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026