The narratives describe three distinct problem patterns in 2008 4Runner cruise-control and acceleration systems. Most common is sudden unintended acceleration when the vehicle is stationary or moving slowly—at traffic lights, in parking spaces, or during parking maneuvers—with drivers claiming they had their foot on the brake. Owners report the engine revved up on its own, the vehicle moved forward 10 to 800 feet, and multiple brake applications were needed to stop it. Several crashes resulted, including impacts with trees, buildings, barriers, and other vehicles.
A second pattern involves the accelerator pedal sticking to the floor or jamming and failing to return. One owner documented a broken plastic hook on the floor mat that allowed the mat to slip under the accelerator pedal, causing it to jam. Owners report the pedal required manual pulling to release, or multiple attempts before it would reset.
Third is delayed accelerator response—the pedal does not react on the first or second application, then suddenly surges, causing rapid uncontrolled acceleration. Mileage at failure ranges from 7,380 to 80,900 miles. Dealers consistently reported they could not duplicate the failures. One dealer stated no replacement parts were available for floor-mat-related repairs. Toyota's response varied: some representatives were scheduled for inspection; one dealership excluded Japan-built vehicles from the floor-mat recall; and one manufacturer stated a remedy would not be available until April 2010.
Failure modes owners describe
Unintended acceleration with vehicle in stationary position
Vehicle accelerates suddenly while parked or stopped, either in traffic, parking spaces, or at intersections, despite driver foot on brake pedal. Owners report the vehicle moved forward uncontrolled, sometimes traveling significant distances before stopping.
When: Incidents reported at low speeds (2-40 mph), at traffic lights, parking spaces, and turn lanes; mileage range 8,236 to 80,900 miles
Symptoms owners cite: Sudden engine power increase while brake pedal depressed; Vehicle accelerates and moves forward despite brake application; Multiple brake applications needed to stop vehicle; Vehicle traveled uncontrolled distance (10-800 feet reported)
Repairs/costs cited: Multiple owners reported dealers could not duplicate failure. One owner (#7) reported dealer had no parts available for repair of accelerator jam caused by broken floor mat hook. One owner (#4) noted accelerator pedal was manually pulled up by spouse after two recurrences.
Recalls/TSBs owners mention: Toyota dealer in narrative #1 found no system failure in braking or accelerator systems and stated vehicle was not included in floor mat/unintended acceleration recall (made in Japan, not USA). Manufacturer representatives were sent to inspect vehicles in narratives #4 and #11. In narrative #12, manufacturer advised remedy would not be available until April 2010.
Accelerator pedal sticking or jamming to floor
Accelerator pedal becomes stuck, goes to floor, or falls onto floorboard and will not return to normal position. In one case, a broken floor mat hook allowed the mat to slip forward under the accelerator pedal.
When: Mileage range 7,380 to 55,000 miles; one incident at 8,236 miles within first weeks of ownership
Symptoms owners cite: Accelerator pedal stuck at floor; Pedal falls onto floorboard; Pedal does not return to normal position; Vehicle accelerates uncontrollably when pedal is stuck; Multiple attempts needed for pedal to release; Pedal manually pulled up by driver/passenger in one case
Repairs/costs cited: Narrative #7 documented broken plastic hook on driver's side floor mat that allowed mat to slip under accelerator. Dealer had no replacement parts available and no timeline for parts arrival. Narrative #4 owner manually pulled pedal up on two recurrences.
Recalls/TSBs owners mention: Narrative #7 references floor mat recall but notes dealer had no parts to perform repair. Narrative #4 mentions manufacturer representative scheduled to inspect vehicle.
Delayed accelerator response followed by sudden surge
Accelerator does not respond normally to pedal pressure initially; engine does not rev or vehicle does not move as expected on first or second pedal application. After multiple applications, engine suddenly revs and vehicle accelerates rapidly.
When: Narrative #5 incident on January 28, 2010 at 13,000 miles
Symptoms owners cite: No response to first accelerator pedal application at traffic light; Slight forward movement only on first attempt; No response to second pedal application; Vehicle rolled into intersection during unresponsive period; Engine revved up and vehicle accelerated rapidly on third pedal application; Condition returned to normal after brake application
Repairs/costs cited: Dealer showed no concerns when incident reported on February 1, 2010.
Synthesized from 12 NHTSA owner complaints — unverified consumer
allegations, summarized for patterns. The verbatim filings appear below.