Which parts fail
Components named in complaints (accelerator pedal, throttle, sudden acceleration, cruise control).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 1999 Chrysler LHS owners, lightly cleaned up (personal details are redacted by NHTSA).
Dt*: the contact stated while shifting into reverse the vehicle suddenly accelerated without warning. The sudden acceleration occurred on three occasions. During the first occurrences the vehicle stopped when the brakes were applied. The third time the vehicle bumped into a telephone pole before stopping. Upon inspection the independent repair shop found the pin in the throttle body came out. The pin was reinstalled by the independent repair shop. The consumer paid for the repairs. Updated 03/20/06.
Had right foot on brake while pulling my car into gear from park. Suddenly without warning my car accelerated on its own without my having depressed the accelerator. My car took off with a loud screech of tires. My right foot remained on the brakes the entire time as I desperately tried to stop my run away car. No matter how hard I tried to depress the brakes, they did not respond, or even slow my car down. A lady at the doctor's office where we were said that my car sounded like a jet engine taking off. My car jumped a curbing, climbed an embankment planted with shubbery and finally centered a pine tree which stopped the forward progress of my car. My daughter-in-law who was riding in the back seat with her eight month old son hit her head hard on the window. The car dealership and Chrysler motors corporation said they found no problem with my car, and that this car is safe to drive. …
I have investigated this vehicle owned by [redacted] which was subjected to unintended acceleration in reverse from a start. I have researched your database for customer complaints and returned a high percentage of these vehicles have complaints about unintended acceleration. 1998 Chrysler LHS: 2 of 3 complaints about unintended accel., 1998 Chrysler concorde 9 of 54, 1999 Chrysler 300m and 300 m, 8 of 51; 1999 Chrysler concorde 9 of 46; I believe that this high incidence of owner complaints indicates that there my be problems and a defects investigation by your office May be justified. Thank you, [redacted]. Parts of this document have been redacted to protect personally identifiable information pursuant to the freedom of information act (foia), 5 U.S.c. 552(b)(6).
Speed control/transaxle. 2nd occurrence. 1st with 98 chrylser concorde. 2nd with this past Saturday, 3-22-03. When the speed control module goes out, you are left with only 1st and reverse. According to the service tech at hemet Chrysler, it happens more than it should. If it goes out while at highway speeds, it immediately shifts the car into 1st and you almost come to an abrupt halt. No accident, but it could result in one in heavy traffic and would probably hit in the rear with the sudden deceleration in speed.
I tried for over a mile to disengage the cruise control with the switch and brake. I started on level Land, went uphill and down and had the brake to the floorboard. There were toll booths with a number of occupied vehicles in line. To avoid injurying or killing someone, I left the roadway hitting barriers and unoccupied vehicles. My wife suffered numerous bruising and bent glasses. I suffered a broken strernum and have developed fluid in my lungs and possibly around my heart. My prognosis is uncertain at this time.
Vehicle parked in garage. With right foot on brake started engine. Still with right foot on brake released shift from park to reverse. The car accelerated at full speed engine roaring, wheels spinning on garage floor. Went out of driveway across street and ditch into neighbors yard thru another ditch into another street. Went airborne turning over against pole stopping the vehicle. Engine stopped screaming only at time the left wheel bent under the car.
While backing out of a parking space the vehicle suddenly accelerated backwards, nearly causing a collision. Cause unknown. The vehicle accelerated in reverse on its own numerous times causing accidents. On one occasion, the sudden acceleration caused a 6 car collision, consumer is requesting a response back, luckily there have not been any injuries in the four accidents caused by sudden acceleration.
Consumer was backing out of the garage. Vehicle was in park and driver had foot on brake pedal when vehicle suddenly took off, and went inside of consumer's dining room area. Vehicle stopped by the brick wall. Consumer put vehicle in reverse, and it stopped.
While wife was pulling out of parking garage vehicle suddenly accelerated, and driver could not control vehicle,hitting other people around. Vehicle finally stopped, and had to be towed. Dealer could not tell what was the cause of acceleration.
The throttle body of my car is defective and Chrysler knows about this defect. They have sent service bulletins out to dealerships, but have failed to notify car owners. In the early stages the car runs very poorly, as the the throttle body begins to deteriorate more rapidly, it changes the speed of the car with no notice and without any effort from the driver. The car can actually lunge forward at a complete stop because of this defective part. I waited several weeks before I was able to obtain a throttle body on my own. The service dept. Of the local dealership was useless in this effort. I believe that this second throttle body is no better than the first one. The car is beginning to act the same way. Chrysler knows they have a problem, they've sent service bulletins to the dealerships about it. …
NHTSA investigations
Throttle control failure
Based on the low failure rate, the absence of failures over the past year, the absence of injuries, and odi's field investigation of incident vehicles, a safety-related defect trend has not been identified at this time.accordingly, this investigation is closed.the closing of this investigation does not constitute a finding by NHTSA that no safety-related defect exists.the agency will take further action if warranted…
Acceleration complaints in other LHS years
Frequently asked questions
How common are acceleration problems on the 1999 Chrysler LHS?
NHTSA has 25 complaints about the speed control & acceleration of the 1999 Chrysler LHS, 15% of the model year's 165 complaints. The component named most often is linkages (2 mentions).
Is there a recall for 1999 Chrysler LHS acceleration problems?
No. NHTSA lists no speed control & acceleration recall for the 1999 Chrysler LHS, though it has 4 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 1999 Chrysler LHS acceleration problems start?
Half of the complaints with a recorded mileage happened before about 64,000 miles, and 25% before 25,000 miles.
Is it dangerous?
Owners linked 13 crashes, 0 fires and 14 injuries to speed control & acceleration problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.