Both rear brakes seized Toyota Highlander

[Venkata Balaga]

Hello

wondering, how to diagnose root cause both rear brake seized/locked up
2003 Highlander Limited

Topic

[Richard Kirshy]

Suggest you clamp off the soft line(s)
Attempt to loosen the bleeders and try to compress the piston(s).
If there is no movement, you most likely have seized calipers.
If the caliper pistons retract with some effort, you may have a fault further forward:
Faulty brake hoses(s)
Kinked brake hard line
Faulty master cylinder

[Venkata Balaga]

Thank you

[Billy]

Also check the parking brake. The cable could be seized, lever mechanism snagged, etc.

[Venkata Balaga]

Thank you.
will give it a try.

if the issue is master cylinder, wouldn’t it happen to front and rear? just curious.

Thanks again for both your input.

[Author]

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