Other speed control problem on the 2012 Lexus Rx350
7 crashes 3 injuries 10 of the 10 reports for this failure mention a crash, a fire, an injury or a death. Those are the owner's words on the complaint form, not a verified finding, and one report can mention more than one.
When other speed control problem gets reported
Owners of the 2012 Lexus Rx350 report other speed control problem at a median of 15,000 miles. A quarter of the reports come in before 5,000 miles and a quarter after 20,000 miles, from 10 reports that carried an odometer reading.
A part like this is normally expected to survive 78,000 miles. It is the 1st most-reported problem on this model year.
The mileage distribution
The reported range runs from 2,300 miles at the tenth percentile to 25,000 miles at the ninetieth, a spread of 24,167 miles across the middle 80% of reports.
A window that narrow is the signature of a part that fails on its own schedule rather than on how the car is driven — which is usually a design or supplier problem rather than wear and tear.
100% of the dated reports were filed under 36,000 miles.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| 2,333 miles | 6,474 miles | 14,439 miles | 18,720 miles | 26,500 miles |
Read the 10th percentile as “one report in ten arrived this early”. Exact figures are shown in this table because it is the table of record; everywhere else on the site they are rounded to the precision the sample can carry.
What a percentile can and cannot tell you here
These five numbers describe the readings owners gave, in order. The median is the middle one: half the reports arrived below it. The 10th and 90th are the edges of the bulk of the distribution, and the distance between them is the part worth reading. A tight spread — say 70,000 to 95,000 miles — points at something that wears out on a schedule, and the schedule is knowable. A wide one, 20,000 to 190,000, points at a fault that hits some cars and never troubles others, which means the mileage on the listing in front of you tells you very little about your odds.
What these figures are not is a survival curve. Every reading here comes from a car whose owner filed a complaint, so the sample contains only failures: it cannot say what share of the fleet made it past 150,000 miles untouched, because those owners had nothing to report. Nor is the mileage the moment of failure — it is the odometer reading as recalled at the time of filing, which may be weeks later and is sometimes rounded to the nearest ten thousand by the person typing it.
Percentiles are shown at all only once 8 readings exist for the vehicle and mode. Below that the middle of a handful of numbers is noise wearing a decimal point, so the figures are withheld rather than dressed up.
What happens, and what it costs
Of these reports, 7 a crash and 3 an injury are mentioned. Owners write their own complaints and the agency does not verify them, so read this as what the reports say happened rather than as a confirmed count.
Putting it right typically runs $250–$2,000 at an independent US shop. That range is an editorial estimate held in this site's failure-mode catalogue, not a figure from NHTSA, and it is a repair cost rather than a diagnosis cost.
This mode is classified as critical, which means a failure can leave the car unable to stop, steer, or stay out of the way of traffic. It is weighted accordingly in the risk score.
The same failure on other years
The same failure is reported on 12 model years of this car. It shows up earliest on the 2019, at a median of 1,800 miles, and latest on the 2013 at 70,000 miles.
By volume the 2010 carries the most reports, with 29; the 2012 has 10. A mode that appears across most years of a model is usually a design choice rather than a bad batch.
If one year stands out to the left, that is the year to avoid; if the whole line sits at a similar mileage, this is wear rather than a defect in one production run.
Tick median reported mileage Solid middle half of reports Faint 10th to 90th percentile Colour how bad the failure is when it happens
What owners wrote
Verbatim from NHTSA complaint narratives, trimmed for length. The mileage is the one the owner gave.
On 6/25/2012- at 7:10 am, I was pulling into the parking spot for my vehicle in my hospital parking lot for a scheduled surgical case, where I work as an ob/gyn physician/surgeon . As I turned to the parking spot at the usual, approximately 2-4 miles /hr speed ( the speed at which normally one parks the car), I noticed that my accelerator pedal did not bounce back to its original position as it normally should or would. Then my rt foot was on the brakes to just stop the vehicle in my parking spot. Then just instantly the vehicle had increased speed and before I could stop the vehicle, it ran forward uncontrollably and climbed up the cement pathway and hit the tree just in front of that parking spot. I was pressing on the brakes and it did not stop the engine raving and I stopped the engine by turning it off. The front of the car is severely damaged including bent frame and the engine is pushed inside according to the body shop. I felt I had no control of the vehicle and it ran on its own. It was the scariest feeling. Imagine the damage and casualty it could have caused if it happened at the signal crossing. *tr
Tl* the contact owns a 2012 lexus rx 350. The contact stated that after stopping at a traffic light she attempted to accelerate, the vehicle moved forward a few feet but then deccelerated and drifted through the intersection. The failure recurred several times. The vehicle was taken to a dealer on three occasions and each time the failure could not be replicated. The manufacturer was notified but offered no assistance. The failure mileage was 20 miles and the current mileage was 5,800.
While pulling into a parking space at approx. 3 MPH and being less than a foot from where I would have fully stopped, the vehicle accelerated uncontrollably as the engine raced at a very high RPM. I was able to turn my wheel quickly to the left to avoid hitting the vehicle in front of me. At that same time with my foot that was already on the brake and I braked very hard, then shifted into neutral and the vehicle stopped. I had a small piece of wood flooring on the back seat which came flying to the front and cut the passenger side dashboard. I just reported the issue to lexus and they suggest I bring the vehicle to a dealership asap. *tr
Also reported on the 2012 Lexus Rx350
Other brake problem
Other powertrain problem
Other electrical problem
Other engine problem
Other fuel system problem
Other driver assistance problem
How far this goes
Complaints are voluntary, so 10 is a floor and not a count of affected cars. Mileages are typed in by owners and cluster on round numbers. And the mode itself is assigned by software reading the complaint text, which is reliable in bulk and fallible one report at a time.
Questions this page answers
At what mileage does other speed control problem happen on the 2012 Lexus Rx350?
Across 10 owner reports that included an odometer reading, half were filed by 15,000 miles. A quarter were filed before 5,000 miles and a quarter after 20,000 miles. These are the mileages owners reported when they complained, not a prediction for any individual car.
How common is other speed control problem on the 2012 Lexus Rx350?
10 reports have been filed with NHTSA, about 0.2 per 1,000 vehicles. Complaints are voluntary, so this is a floor rather than a count of affected cars.
What this is and is not. These are the mileages at which owners chose to complain to a federal agency, which is not the same as the mileage at which the part fails on every car. It skews toward failures that happened outside warranty, cost real money, or frightened someone. It is still the only public dataset that carries failure mileage at all, and the shape of a few hundred readings is informative even when a single one is not. Methodology · JSON · this failure on other cars
Source Owner complaints and recall records published by the US National Highway Traffic Safety Administration, model years 1996–2027 Figures rebuilt Published by AtWhatMileage How every figure is computed