2021 Jeep Wrangler: engine knocking or ticking

Filed Jul 16, 2026 · Electrical · IL

Steering wiring harness supposedly catches fire. They do not have a remedy available. Over a million owners on hold. It's been over thirty days since they relased that information. Mailed out notices on the 9th they say. Have yet to receive it. I live in a towhome, and parking it outside but still near neighbors and the adjacent units. Not safe when driving to work, not safe ever. It's a literal death risk. This is ridiculous and criminal on so many levels. Its has not been inspected as it needs the recall regardless. The recall they can not produce. No warning, no signs. A ticking time bomb putting million of Americans at risk. Needs to be intervention.

Filed Mar 2, 2026 · Driver assistance, Engine · NJ

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

Filed Jan 4, 2025 · Engine · TX

Metal chunks found in engine oil, and as were not metal powder swirl, shavings, or specs, possibly from bottom engine crankshaft. At the crank pulley, with the belt off, I could feel nudge by hand from the middle, for an engine component with max specified endplay 0.012 inches, or fraction of a millimeter. An existing manufacturer recall, and not a safety recall, for this 2021 Jeep Wrangler 2.0L Turbo is inspection for loose bolts for water pump inlet. This vehicle will not be available for inspection requests, because it is still not, and waiting to be, diagnosed as the dealer could not necessarily hear an engine issue. I have heard it knock, like a rumbling V8 and turbo whined, and recently I decided to strain the old and knocking oil that I kept and discovered metal. There was something wrong all along. Top engine, with good gas mileage, has been fine. The safety concern to this vehicle is metal in oil to possibly enter top engine and create sudden or instant engine seizure while in operation. The safety of driver or others could be at risk. The safety concern to this vehicle is also the detioration of engine components since they appear under the sole discretion of this motorized vehicle. This means, no other factor known to the driver of this vehicle by which rate of engine detioration has occurred. An indicating observation to be made into this vehicle's safety is the endplay of the crankshaft. This vehicle is nearly 97,000 miles odometer. The endplay seems very excessive, causing me to speculate on original factory fitment and installation during assembly. What determinations into a non-safety recall of loose water pump bolts might emerge as consideration into engine interior deterioration, as rate of this deterioration appear under sole vehicle discretion and remain unknown to the driver. Insufficient cooling is known to cause buildup in any engine, this vehicle has burped coolant air. No warning lights in the dash was seen.

Filed Jul 26, 2024 · Engine, Fuel system · 70,000 miles · MS

The contact owns a 2021 Jeep Wrangler. The contact stated while driving at an undisclosed speed and attempting to accelerate, the vehicle briefly hesitated and lost motive power. The vehicle returned to normal functionality, but the failure became a regular occurrence. The check engine warning light was illuminated. The vehicle was taken to the dealer, who diagnosed failures with the O2 sensor, knock sensor and diesel particulate system. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 70,000.

Filed Aug 14, 2023 · Suspension · TX

The upper spring perch located at passenger rear is welded to the frame on one side and a crossmember on another. The two vertical welds failed with the remaining welds being at the top of the spring perch. The only indications of a problem were an occasional knocking sound when going over a bump and severe vibration coming from the rear of the vehicle. The noise was caused by the spring perch flexing and tapping the bottom of the body. I believe the welds broke early this year but the source of the noise wasn't found until July 2023. With prolonged use in this condition the spring perch can completely fail causing the spring and perch to fall out and make the driver lose control. The dealership submitted pictures and the manufacturer has agreed to replace the entire frame. There are a handful of other people that have reported the same problem (always on the passenger rear) but because of the design, I suspect as these vehicles age stress fractures in the weld will make this issue more prevalent.