Toronto, Ontario – Toyota Canada is voluntarily recalling approximately 28,700 vehicles to address the possibility that a small amount of brake fluid could slowly leak from the brake master cylinder, illuminating the brake warning light. The recall affects certain 2005-2006 Toyota Avalon, 2004-2006 Toyota Highlander (not hybrid) and Lexus RX330, and 2006 Lexus GS300, IS250 and IS350 vehicles sold in Canada.
The brake fluid used in assembly contains polymers, which act as lubricants for certain brake system components. If brake fluid that does not contain polymers or only contains small amounts is used during vehicle maintenance, the brake master cylinder cup, an internal rubber seal at the end of the brake master cylinder piston, may become dry and may curl during movement of the piston. If this occurs, a small amount of brake fluid could slowly leak from the brake master cylinder into the brake booster, resulting in illumination of the brake warning lamp.
If the light illuminates and the vehicle continues to be operated without refilling the master cylinder brake reservoir, the driver will begin to notice a spongy or soft brake pedal feel, and braking performance may gradually decline.
Owners of affected vehicles will be notified by mail beginning in mid-November 2010. Toyota and Lexus dealers will replace the brake master cylinder cup with a newly-designed one at no charge.