Dorman - First Stop Brake Master Cylinder P/N:M39423

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$79.99
MPN: M39423
Item Package Quantity: 1
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Dorman - First Stop Brake Master Cylinder P/N:M39423
Dorman - First Stop Brake Master Cylinder P/N:M39423
$79.99

Convert pedal force into hydraulic braking pressure with the Dorman First Stop Brake Master Cylinder, part number M39423. It drops in as a direct-fit replacement for the 1980-1982 Toyota Corolla [All] and the 1984-1987 Toyota Corolla [All], and is precision-engineered to match the design, function, and performance of the original master cylinder on these applications.

  • 100% new: built entirely from new materials, not remanufactured, for consistent quality and safety.
  • Cast iron housing: the cylinder housing is constructed to match the casting material of the original part for similar performance.
  • EPDM rubber components: made of a high-quality EPDM compound to resist glycol-based brake fluid.
  • Built to spec: made to meet rigorous SAE International standards.

This unit has two outlets with a 0.813 in bore diameter; the rearward and secondary outlet threads are M10 x 1.0 with a 1 mm primary outlet thread pitch. The reservoir is included. Mounting hardware and a sensor are not included — consult the vehicle service information for the correct fasteners and whether they may be reused. Country of origin: Taiwan.

Interchange: Manufacturer part number M39423.

Frequently Asked Questions

What does this brake master cylinder do?

It converts brake-pedal force into hydraulic pressure and directs it through its two outlets to the brake system. If a worn or leaking master cylinder is the cause of a soft or sinking pedal, this replaces it.

Which vehicles does the M39423 fit?

It is a direct-fit replacement for the 1980-1982 Toyota Corolla [All] and the 1984-1987 Toyota Corolla [All]. See the Buyer's Guide tab to confirm your vehicle.

Does it come with a reservoir, hardware, or a sensor?

The reservoir is included. Mounting hardware and a sensor are not included; consult the vehicle service information for the correct fasteners and whether they may be reused.

What is this master cylinder made of?

The cylinder housing is constructed to match the casting material of the original part (cast iron), and its rubber components use a high-quality EPDM compound that resists glycol-based brake fluid.

Is this part new or remanufactured?

It is 100% new, made entirely from new materials rather than remanufactured, and built to meet SAE International standards.