Dorman - First Stop Brake Master Cylinder M39810
Dorman - First Stop Brake Master Cylinder M39810

Dorman - First Stop Brake Master Cylinder P/N:M39810

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$169.99
MPN: M39810
Item Package Quantity: 1
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Dorman - First Stop Brake Master Cylinder P/N:M39810
Dorman - First Stop Brake Master Cylinder P/N:M39810
$169.99

Deliver the firm, responsive pedal pressure your brakes rely on with the Dorman - First Stop Brake Master Cylinder M39810, the hydraulic heart of the brake system. It converts the force you apply at the brake pedal into the hydraulic pressure that moves brake fluid out to the calipers and wheel cylinders. It installs as a direct-fit replacement for the 1989-1994 Nissan 240SX.

  • Core hydraulic job: Takes brake-pedal force and turns it into the fluid pressure that actuates the vehicle's brakes.
  • Signs this part may need replacing: A pedal that slowly sinks under steady foot pressure, a spongy or inconsistent pedal, or unexplained brake-fluid loss can point to a worn master cylinder—diagnose the cause before replacing.
  • Direct-fit application: Designed to replace the original master cylinder on the listed Nissan 240SX model years.

Follow the vehicle service information for the correct bleeding procedure and torque specs, and confirm which fasteners may be reused, since some are single-use.

Interchange: 18M452 · 783-04504 · 78304504 · 83-04504 · 8304504 · M900659 · 100-1451 · 1001451 · M-51504 · M51504 · 072-8682 · 0728682 · 12464 · 13-2458 · 132458 · 11-2458 · 112458 · 130.42504 · 131.42504 · MC250600 · 355-67084 · 35567084 · M52458 · NM52458 · 4601041F20 · 2539810 · MC39810 · F119357 · MC119357. Manufacturer part number M39810.

This part cross-references / interchanges with the following part numbers:

18M452, 783-04504, 83-04504, M900659, 100-1451, M-51504, 072-8682, 12464, 13-2458, 11-2458, 130.42504, 131.42504, MC250600, 355-67084, M52458, NM52458, 4601041F20, 2539810, MC39810, F119357, MC119357

Frequently Asked Questions

What vehicle does this master cylinder fit?

It's a direct-fit replacement for the 1989-1994 Nissan 240SX. Check the Buyer's Guide tab to confirm the match for your specific vehicle.

What does a brake master cylinder do?

It converts the force you apply at the brake pedal into hydraulic pressure, pushing brake fluid to the calipers and wheel cylinders to actuate the brakes.

How do I know if my master cylinder is failing?

A pedal that slowly sinks under steady pressure, a spongy feel, or unexplained brake-fluid loss can indicate a worn master cylinder. Diagnose the cause before replacing.

Do I need to bleed the brakes after installing this?

Yes—bleeding is part of a proper master cylinder installation. Follow the vehicle service information for the correct bench-bleeding and system bleeding procedure.

Are the mounting fasteners reusable?

Consult the vehicle service information for the correct fasteners and whether they may be reused, since some brake hardware is single-use.

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