44 of the 56 complaints filed about the Acura TLX Type S are about the transmission — 79% of everything owners reported. The worst model year for it is 2021.
44
Complaints
79%
Share of all complaints
0
Crashes
0
Fires
POWER TRAIN
Transmission and transfer case failure. Causing the loss of power to the rear wheels. Reducing the traction and stability of the vehicle.
NHTSA complaint #11748982 — an unverified report by a vehicle owner.
POWER TRAIN
While making a right turn from a stop the car made a bang sound followed by grinding upon acceleration. I took my 23 TLX type S to a local Dunn Tire and asked them to put it on the lift. They raised all tires off the ground, started the car, and accelerated. Only the front wheels spun. This is the exact scenario lots of consumers have reported with this model when the transfer case splines break off the shaft. The car is driving without error lights but feels different while corning. It's very concerning that the car has 41k miles on it and is well taken care of. I drive it in winter so AWD is a huge reason I choose it. I have an appointment with my local Acura dealership but its over a week away. I asked to have a tech contact me back to ensure driving it more won't case future issues but they never followed up.
NHTSA complaint #11748393 — an unverified report by a vehicle owner.
POWER TRAIN
While accelerating from a stop, I heard a loud bang from the drivetrain area and initially believed another vehicle had struck the rear of my car. After checking my surroundings, I realized there had been no collision. Immediately after the incident, the vehicle lost power delivery to the rear wheels. The vehicle is designed as an all-wheel-drive performance sedan, and the sudden loss of rear-wheel power significantly changed the way the vehicle handled. The vehicle became effectively front-wheel drive without warning, causing all engine power to be directed through the front wheels. This resulted in reduced traction, altered handling characteristics, and increased front tire wear. No warning lights, messages, or indicators appeared on the dashboard before or at the time of the failure. There were no symptoms that alerted me that a drivetrain failure was about to occur. The vehicle was inspected by an Acura dealership, and Acura confirmed failure of the transfer case and transmission components associated with the all-wheel-drive system. The transfer case and transmission are currently being replaced under the manufacturer's drivetrain warranty. I believe this failure created a safety risk because the vehicle unexpectedly lost its intended all-wheel-drive capability while in operation. Drivers rely on the handling, traction, and stability characteristics of the SH-AWD system. The sudden and unannounced loss of rear-wheel power changed the vehicle's behavior and could increase the risk of loss of control, particularly during acceleration, cornering, emergency maneuvers, or operation in poor weather conditions. The failed components are available for inspection through Acura as part of the warranty repair process.
NHTSA complaint #11741121 — an unverified report by a vehicle owner.
POWER TRAIN
The awd transfer case failed and require replacement along with the transmission
NHTSA complaint #11732126 — an unverified report by a vehicle owner.
POWER TRAIN
The All Wheel Drive (AWD) system of the vehicle became partially inoperable after hearing a loud bang under normal vehicle acceleration some time in early 2025. The vehicle did not trigger or display any warnings stored in the onboard computer or on the dash display that the AWD system had any faults or issues. Had this system failed during an emergency situation involving hazardous or dangerous driving conditions like snow, ice, heavy rain, it could have caused me to not have improved capable vehicle handling. The vehicle's ability to distribute power evenly to all 4 wheels was hindered and operating as front wheel drive only after the loud noise was observed. Additionally, transmission gear oil began leaking underneath the vehicle around the transmission casing. The issue has been reproduced, confirmed, and validated by technicians of a local Acura dealership. The dealership was approved to completely replace the following two components of the AWD system under the manufacturer's 6 year / 60K mileage powertrain warranty: 1. Transmission 2. Transfer case - also known as power transfer unit or PTU
NHTSA complaint #11728955 — an unverified report by a vehicle owner.
POWER TRAIN
Rapid loss of oil from the transfer case, Oil was everywhere. Now I have vibration, wooing sound and hard down shifts from a failing transfer case.. The dealership refuse to replace it because they cleaned the area and it did not leak oil again. Probably, because there's no more oil left in it to leak.This is unacceptable.
NHTSA complaint #11728394 — an unverified report by a vehicle owner.
POWER TRAIN
Lost power to rear wheels. AWD system failure. I was denied repair at my local dealership as they insisted the car was fine. I told them I had no awd they didn’t believe me. I was then forced to trade my car into them for a massive $$ loss becuase i feared for my safety driving a fwd car in the winter. I don’t know who owns the car now. I actually have a video of it happening. I can send you it if you work with me. Thanks.
NHTSA complaint #11723602 — an unverified report by a vehicle owner.
POWER TRAIN
Short Description Transmission-to-PTU splines, causing AWD loss and requiring full transfer case and transmission replacement. Summary This drivetrain failure poses an unreasonable safety risk due to the sudden loss of AWD capability, lack of alerts, and resulting instability. My experience is consistent with dozens of documented cases and matches the mechanical fault pattern already under federal review. Given the potential for severe loss of vehicle control, a full investigation and corrective action (including a recall) is necessary. Symptoms Sudden AWD loss Loud bang or grinding Only front wheels receiving power No warning lights Safety risks Loss of directional stability Wheel spin under acceleration Hazard in inclement weather Cost & extent of repairs Many cases require complete drivetrain replacement costing $13k–$19k. Prevalence 137k+ vehicles, NHTSA DP26‑001 currently open.
NHTSA complaint #11723340 — an unverified report by a vehicle owner.
POWER TRAIN
1. Transfer Case-SH-AWD failure-> No, it was recently replaced at the dealership at no cost. 2. Failure with the AWD system would cause me to be in FWD, only causing failure in steering input, especially in turns. 3. The car was put onto the lift and attempted to spin all 4 wheels, only the front 2 spun. Also, they noticed a seal failure/leak from the Transfercase/Transmission. 4. Acura Technicians recommended the replacement after spotting my concern and pointing out the exact issue 5. No lights or warning since the failure happened I had no idea of how bad the issue was until an Acura Technician brought it up. 5(c). I did notice a difference in driving feel i.e jerking in low gear and a leak on the floor, but thought it was just excess oil from oil changes. Confirmed by the tech, it was not when I asked them.
NHTSA complaint #11723162 — an unverified report by a vehicle owner.
POWER TRAIN
My Acura was not sending power to the rear wheels. The car was driving as if it was front wheel drive only. I feel that the safety of not knowing your vehicle is not acting as they all-wheel-drive vehicle when it’s supposed to an impact safety because the vehicle would not be able to handle as it was intended to. After inspection from the Mechanic shop, the failure was deemed to be the internal lines of the transmission that would connect with the transfer case were stripped. Because of that, there was no power being sensor to the transfer case that will then send power to the rear differential to the rear wheels. There were no warning lights that show that the car is not sending power to the back wheel wheels. The situation that happened at realize that this problem has occurred, was when the front of my vehicle was stuck in snow and the car was unable to get out even when the back wheels were on solid floor.
NHTSA complaint #11723118 — an unverified report by a vehicle owner.
POWER TRAIN
The transfer case in my Acura TLX Type S failed due to the internal splines stripping at approximately 57,600 miles. I heard a loud bang while attempting to maneuver out of a parking spot that was covered in snow. When this occurred, the transfer case was no longer able to transfer power to the rear wheels, causing the all-wheel-drive system to stop functioning. As a result, the vehicle effectively operated as front-wheel drive only. The most concerning part of this failure is that the vehicle provided no warning whatsoever to the driver. There were no dashboard alerts, drivetrain warnings, AWD system warnings, or check engine lights indicating that the AWD system had failed. The vehicle continued to operate and display information as if everything was functioning normally. This occurred during the winter in New York while driving in snowy conditions, where the AWD system is critical for traction and safety. Because there was no warning that the AWD system had failed, I continued driving the vehicle assuming it still had AWD capability. On multiple occasions the vehicle became stuck in snow due to the loss of rear-wheel power. A critical drivetrain component such as a transfer case should not fail under normal driving conditions at this mileage. Additionally, a vehicle equipped with AWD should provide a clear warning to the driver if the system is no longer functioning. The absence of any warning combined with a sudden loss of AWD capability creates a serious safety concern, particularly in winter climates where drivers rely on AWD for traction and control. Under the wrong circumstances this type of failure could potentially lead to an accident or serious injury.
NHTSA complaint #11722731 — an unverified report by a vehicle owner.
POWER TRAIN
Complete loss of AWD. Car is now only FWD with NO WARNING. Loud thud (transfer case splines being stripped) and then immediate loss of AWD.
NHTSA complaint #11722739 — an unverified report by a vehicle owner.
POWER TRAIN:AUTOMATIC TRANSMISSION:INTERNAL:SHAFT:OUTPUT
See Attached Letter for potential Defect Petition DP26001
NHTSA complaint #11712885 — an unverified report by a vehicle owner.
POWER TRAIN
This 2021 Acura TLX Type-S has experienced a complete failure of the transfer case after approximately 40,000 miles of use. This unfortunately is a known issue on the online forums for this vehicle in model years 2021-2023. I have a video inspection performed by the local dealership proving this. The only warning is a one-time loud boom when accelerating and a leaking from the transfer case of fluid thereafter. There is no safety issue best I can tell, however the car only performs in front drive mode once the transfer case quits working. The issue is due to weak splines within the transfer case that shear off and thus damage the 10-speed automatic transmission in the process. Acura has a 6 year 70,000 mile warranty, so a complete replacement is covered, however my concern is for whether the new transfer case part # 29000-5YK-060 which replaces the old 29000-5YK-050 part will do the same. This is a very expensive fix into the 5 figures (over $10,000) and really needs to have a recall as there are dozens and dozens of owners online who have experienced this failure.
NHTSA complaint #11712500 — an unverified report by a vehicle owner.
POWER TRAIN
Was driving the car under normal acceleration when the transfer case failed. No power to the rear wheels. Acura dealer confirmed the problem. Will be fixed under warranty. No warning lamps or messages on the dash.
NHTSA complaint #11696739 — an unverified report by a vehicle owner.
POWER TRAIN
Transfer case blew. AWD was not working.
NHTSA complaint #11696489 — an unverified report by a vehicle owner.
POWER TRAIN
While driving my 2021 Acura TLX Type S, I began losing traction frequently during normal daily driving, especially when turning corners or accelerating from a stop sign or stop light. At first, I believed the issue was related to my tires, so I replaced them, but the same problem continued. After researching online, I discovered that transfer case failures are a known issue on these vehicles, affecting both new and used models. Currently, my vehicle is at the dealership, but they were unaware of this recurring transfer case problem and have no information about it. This is concerning because the failure of the transfer case directly affects traction and stability, creating a potential safety risk to myself and others on the road. It appears to be a systemic issue that Honda/Acura has not yet acknowledged.
NHTSA complaint #11693788 — an unverified report by a vehicle owner.
POWER TRAIN
Transmission and transfer case failed. Traction control light flashes when accelerating.
NHTSA complaint #11693166 — an unverified report by a vehicle owner.
POWER TRAIN
- The transfer case failed causing the AWD system to stop working -It is a safety concern because you may lose control since no power is going to rear wheels, especially in inclement weather that we receive in the northeast. -Yes the problem has been confirmed by dealership by putting car on lift and seeing that no power is being sent to the rear wheels. -There are no warning lights or any signs, you just hear a loud bang while driving and lost of traction while accelerating
NHTSA complaint #11689393 — an unverified report by a vehicle owner.
POWER TRAIN
While performing a right turn, under normal acceleration a loud "pop/clunk" occurred. I immediately pulled into a parking lot as the vehicle was still able to drive. The vehicle runs as normal, no leaks of any kind present. Nothing visibly broken. Afterwards, I was able to determine with the vehicle suspended off of the ground, I am getting power only to the front wheels. Utilizing google, it's easy to see that this has become a MASSIVE issue on this particular model TLX Type S. The vehicle will be taken to Acura on Monday Aug 18th 2025 for diagnostics, but it's quite obvious that the splines on the transfercase at the transmission mounting location have sheared completely, thus making the vehicle front wheel drive powered only. Given my current situation, my hope is that Acura will honor the power train warranty as it is my understanding that both the transmission and the transfercase are required to be replaced in this instance. Acura also needs to issue an updated transmission/ transfercase combination and a recall because this is happening way to often and it's quite an expensive repair.
NHTSA complaint #11681206 — an unverified report by a vehicle owner.