OEM 2003 Toyota Prius Brake Booster

2003 Toyota Prius Brake Booster Parts Q&A

• Q: How to service and repair the hydraulic brake booster on 2003 Toyota Prius?

  A: Begin all hydraulic brake booster servicing and repairs with an OFF ignition switch and more than 40 brake pedal depressions. The syringe procedure requires fluid removal while avoiding any contact between brake fluid and painted surfaces. First remove the top panel of the outer front cowl then disconnect the fluid level warning switch connector from the reservoir before removing its two bolts fastened with a Torque of 7.5 Nm. After that disconnect the 3 fluid hoses and extract the entire reservoir system with the attached hoses. First disconnect the 3 hoses from the reservoir bracket clamp before removing the 4 bolts from the reservoir bracket while tightening them to 18 Nm. The installation of Special Service Tool: 09023-00100 requires use with a spanner (Torque: 15 Nm) to extract the right front brake line with its attached grommet from the body. The brake line must be disconnected from the hydraulic brake booster assembly through the use of the same special service tool during installation (Torque: 15 Nm) while also removing 2 connectors. The removal process for the hydraulic brake booster assembly demands detachment of three bolts and a nut with 19 Nm torque then removal of the assembly along with two bolts and a sub bracket at 19 Nm torque. The installation procedure requires following the reverse order of removal while adding brake fluid to the reservoir then performing brake system bleeding and inspecting for leaks.