Toyota Sequoia under investigation for ‘inappropriate’ stability braking
The National Highway Traffic Safety Administration has opened an investigation into older Toyota Sequoia SUVs, responding to complaints of ‘inappropriate’ stability-control intervention.
The agency has received at least 135 complaints describing unexpected steering pull while driving. The behavior is said to be caused by selective braking from the stability control system, rather than a steering failure or other mechanical problem.
“Approximately 60 percent reported a vehicle pull to the right at highway speeds,” the investigation summary notes. “Many of the complaints allege experiencing multiple incidents with some involving little to no pull lasting several seconds and others involving greater pull for short duration, frequently described as feeling like a “jerk” to the steering wheel.”
Approximately half of the complaints have been traced to a faulty yaw-rate sensor, presumably causing erroneous measurements that are misinterpreted as a loss of vehicle control.
“There is a noticeable swerve to the right accompanied by a grinding noise,” one complaint says. “The dealer says a new yaw rate sensor and VSC ECU will fix it. About $1,800 above the $105 already paid for the diagnostic fee. What really gets my ‘goat’ is there is a recall for the ‘early’ 2003 models for the same problem.”
The 2003-model-year campaign focused on a positioning error related to the steering angle sensor, causing acceleration problems when taking off from a stop.