2010-03-15 21:13:43 UTC
enough attention to the Toyota UA complaints. However, I did come
across what I think was a very good report on an investigation of UA
concerns as they relate to the Lexus ES350. A copy is at
Here is the sumary:
• Mechanical interferences at the accelerator pedal revealed that the
assembly was easily entrapped in the groove of the rubber all-weather
floor mat if the
rubber mat was not properly secured with at least one of the two
• A survey was sent to 1986 registered owners of a 2007 Lexus ES-350
information regarding episodes of unintended acceleration. Of the 600
responded, 59 stated that they experienced unintended acceleration and
complained of pedal interference with the Lexus rubber all-weather
• With the engine throttle plate open, the vacuum power assist of the
cannot be replenished and the effectiveness of the brakes is reduced
o Brake pedal force in excess of 150 pounds was required to stop the
compared to 30 pounds required when the vehicle is operating normally.
o ESC activation may restore vacuum to the brake booster, providing a
increase in braking capability, but only until ESC activity ceases.
• The owner survey indicated the 3 second delay in the operation of
the ignition button
is not widely known by owners and because of this, drivers found
to turn off the engine when the vehicle was in motion.
• Many owners complained that the neutral gear position in the gated
shift pattern was
not immediately obvious, leading to unsuccessful attempts to disengage
from the drive wheels.