Dorman - First Stop Brake Master Cylinder P/N:M630815

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$196.99
MPN: M630815
UPC: 885484266780
Item Package Quantity: 1
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Dorman - First Stop Brake Master Cylinder P/N:M630815
Dorman - First Stop Brake Master Cylinder P/N:M630815
$196.99

Turn brake-pedal force into the hydraulic pressure that operates the braking system with the Dorman First Stop Brake Master Cylinder M630815. It installs as a direct-fit replacement for the 2008-2011 Scion xD (All engines), and Dorman precision-engineers it to reproduce the design, function, and performance of the original master cylinder on those applications.

  • 100% new: built entirely of new materials — not remanufactured.
  • Aluminum housing: the cylinder housing is cast to match the original part's casting material for similar performance.
  • EPDM seals: the rubber components use a high-quality EPDM compound for resistance to glycol-based brake fluid.
  • Built to spec: made to meet rigorous SAE International standards.

Specifications include two outlets, a 0.875 in bore diameter, and M10 x 1.0 outlet threads. The reservoir and fluid-level sensor are included; mounting hardware is not — consult the vehicle service information for the correct fasteners and whether they may be reused. Country of origin: Taiwan.

Interchange: 100-3733 · 1003733 · 13-4023 · 134023 · 11-4023 · 114023 · 130.44508 · 130.44512 · 355-91004 · 35591004 · NM55465 · MC391293 · 4720152430 · 4720152432 · F143683 · MC143683. Manufacturer part number M630815 · Part Eazy SKU M630815.

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

100-3733, 13-4023, 11-4023, 130.44508, 130.44512, 355-91004, NM55465, MC391293, 4720152430, 4720152432, F143683, MC143683

Frequently Asked Questions

What vehicles does this master cylinder fit?

It's a direct-fit replacement for the 2008-2011 Scion xD (All engines). Check the Buyer's Guide tab to confirm your exact vehicle.

Are the reservoir and sensor included?

Yes. The reservoir and fluid-level sensor are included. Mounting hardware is not — consult the vehicle service information for the correct fasteners and whether they may be reused.

What are the key specs?

It has two outlets, a 0.875 in bore diameter, and M10 x 1.0 outlet threads.

Is this unit new or remanufactured?

It's 100% new, built entirely of new materials rather than remanufactured, with EPDM rubber seals that resist glycol-based brake fluid.

What are signs the master cylinder may need replacing?

Signs may include a sinking or spongy brake pedal or brake fluid leaking at the cylinder. Diagnose the cause before replacing, as other components can produce these symptoms.