Automatic Emergency Braking problems of the 2021 Jeep Wrangler

My 2021 Jeep Wrangler rubicon (3. 6l etorque, automatic transmission) has experienced recurring drivetrain instability beginning at approximately 2,000 miles while under factory warranty. The vehicle intermittently exhibits a high-rpm flare during acceleration, where the engine speed increases without a commensurate increase in vehicle acceleration. The transmission then abruptly engages, causing sudden jerking. At low speeds (approximately 10–5 mph), the vehicle shudders and harshly downshifts, creating a sudden grabbing sensation. Engine rpms fluctuate during deceleration as if the transmission cannot smoothly match engine speed. Braking feels inconsistent, and at times it feels as though the vehicle is accelerating or resisting braking input before abruptly slowing. The vehicle has felt as though it would stall at low speeds and has stalled intermittently. Additionally, the forward collision warning / automatic emergency braking system has activated without an obstacle present. There have also been intermittent instances of loss of power steering assist. The engine has developed a ticking noise and a high-pitched ringing/whining sound from the engine area during operation. In January 2026, the transmission catastrophically failed and required replacement of the transmission, torque converter, cooler, and control module. The vehicle was out of service for over 24 days. Following installation of a mopar remanufactured transmission and torque converter, the same symptoms have recurred, including rpm flare, delayed shifting, shuddering, harsh downshifts, unstable deceleration, and abnormal engine noises. These conditions present a safety concern due to loss of expected acceleration, unpredictable torque engagement, unintended braking activation, intermittent power steering loss, stalling behavior, and drivetrain instability. The vehicle is currently under further diagnostic evaluation. I have multiple documents, but the file is too large to upload.

I have a 2021 Jeep Wrangler 4xe rubicon. My vehicle has been recalled three times for updates. I have had one recall done for the defroster due to the faulty software that can cause reduced visibility increasing a risk of a crash. The second one was for risk of fire from a faulty high voltage battery driving or parked. The third recall call was to update software for the high voltage battery in which doing so caused my vehicle not to fully charge and to lose power when driving and not be able to start for hours at a time. I now have brought my vehicle back to the Jeep service center for a diagnostic test and it was found that the high voltage battery pack is faulty in which Jeep has said they will put a new battery in once approved from Chrysler. Jeep has not been able to be able to fix the problem with hybrid battery packs possibly catching on fire or exploding and the new one I'd be getting would risk the same problems possibly injuring or killing myself or any passengers I might have in the vehicle. Jeep is not able to get to the root of the cause of why these high volt battery can go on fire even when they are not in use causing possible property damage to my home or neighbors. I am told in the recall to park my vehicle away from properties and other cars which is impossible to do. I hope you take this serious matter into consideration that Jeep corporation must find a solution for this nationwide problem and for people on the road.

While stopped at a light on a busy highway I heard a loud sound similar to the automatic emergency braking system engaging. When the light changed the vehicle would not move. I tried turning it off and then back on again with no luck. The dash displayed the message "service charging system" and then ultimately illuminated an icon for the 12v battery and the charging system. I wound up having the vehicle towed to a local dealer where it currently remains waiting to be repaired. My biggest fear here is that there was no way to move the vehicle, some type of limp mode would be a much better solution so at least I could have moved out of traffic.

My 2021 Jeep Wrangler rubicon (3. 6l etorque, automatic transmission) has had recurring drivetrain instability since about 2,000 miles while under factory warranty. It intermittently has high rpm flare during acceleration, delayed shifting, shuddering under load, and abrupt engagement. At low speeds (about 10–5 mph), it harshly downshifts, grabs suddenly, rpms jump up and down, and it can feel like it will stall; it has stalled intermittently. Braking feels inconsistent, and at times it feels like the vehicle resists braking or surges before slowing. The forward collision warning/automatic emergency braking has activated with no obstacle present, and the power steering assist has been lost intermittently. There is also an engine tick and a high-pitched whining noise from the engine/drivetrain area. In January 2026, the transmission catastrophically failed and required replacement of the transmission, torque converter, cooler, and control module. The vehicle was out of service for over 24 days. After installation of a new mopar remanufactured transmission and torque converter, the same symptoms returned. Aamco has now found that the new torque converter failed, with metal shavings throughout the transmission, in the fluid, and at the bottom of the pan. I was advised that the vehicle should be sent to a Jeep dealership because no codes are currently present. I was also advised that the dealership may replace only the torque converter rather than the entire transmission, despite recurring failure and metal contamination. This presents a safety concern due to loss of acceleration, unpredictable torque engagement, stalling, unintended braking activation, power steering loss, engine/drivetrain noise, and repeated drivetrain failure. I have all the records if requested, file is too large to send in the upload area.