2003 Volvo S80 BaseFACTORY OEM SERVICE PROCEDURE

System description

The brake system, with integrated EBD function, has undergone major changes compared with the previous models. The type designation is ABS Mark 20, manufactured by ITT (TEVES).

The most important changes are:

  • Diagonally split circuit brakes (LF+RR, RF+LR).
  • Each wheel is individually controlled.
  • New master brake cylinder (equal amounts of brake fluid in both circuits).
  • Servo cylinder with pedal position sensor (The sensor is connected to the engine control module (ECM)).
  • Hydraulic unit (two valves have been added to certain variants).
  • New wheel speed sensors (Active sensors).
  • The control module, connected to the network.

The system can be complemented with a stability and traction control, Traction control alternatively STC. Car/variant/market dependent, standard/option.

Common components for different car projects.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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