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Dorman - First Stop Brake Master Cylinder P/N:M390023
$137.99
Generate the hydraulic pressure that feeds both brake circuits with the Dorman - First Stop Brake Master Cylinder M390023. It is precision-engineered to match the design, function, and performance of the original master cylinder, dropping in as a direct-fit replacement for the 1991-1997 Mazda Miata [All engines].
- Aluminum housing: the cylinder housing is constructed to match the casting material of the original part for similar performance.
- Durable EPDM seals: all rubber components use a high-quality EPDM compound for resistance to glycol-based brake fluid.
- 100% new: built entirely from new materials, not remanufactured, and made to meet rigorous SAE International standards.
- Ready to service: includes an integrated reservoir and sensor, with two outlets threaded M10 x 1.0 and a 0.875 in bore.
A master cylinder converts brake-pedal force into the hydraulic pressure that operates the brake system through both outlets. If a worn or leaking master cylinder is the cause of a sinking or spongy pedal, this unit replaces it. Mounting hardware is not included; consult the vehicle service information for the correct fasteners and whether they may be reused. Country of origin: Taiwan.
Interchange: 18M559 · 83-14801 · 8314801 · M900767 · 100-1812 · 1001812 · M-53801 · M53801 · 072-8909 · 0728909 · 12910 · 13892 · 13-2576 · 132576 · 11-2576 · 112576 · 130.45801 · MC512330 · 355-80100 · 35580100 · M52576 · NA2343400 · NA234340Z · NA234340ZA · NAY34340Z · MC390023 · F123533 · MC123533 · Manufacturer part number M390023
This part cross-references / interchanges with the following part numbers:
18M559, 83-14801, M900767, 100-1812, M-53801, 072-8909, 12910, 13892, 13-2576, 11-2576, 130.45801, MC512330, 355-80100, M52576, NA2343400, NA234340Z, NA234340ZA, NAY34340Z, MC390023, F123533, MC123533
Frequently Asked Questions
What vehicle does this master cylinder fit?
It is a direct-fit replacement for the 1991-1997 Mazda Miata (all engines). Check the Buyer's Guide tab to confirm the fit for your vehicle.
Does it include a reservoir and sensor?
Yes. This master cylinder includes an integrated reservoir and a sensor. Mounting hardware is not included.
What are the specs of this master cylinder?
It has an aluminum housing, a 0.875 in bore, and two outlets threaded M10 x 1.0. It is 100% new, not remanufactured, and made to meet SAE International standards.
Is this a new or remanufactured unit?
It is 100% new, built entirely from new, high-quality materials rather than remanufactured, and its rubber components use an EPDM compound for glycol-based brake fluid resistance.
What are the signs a master cylinder may need replacing?
Common signs include a brake pedal that slowly sinks to the floor, a spongy pedal, or fluid leaking from the unit. Have the cause diagnosed first, since these signs can have other sources.
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Dorman
Dorman - First Stop Brake Master Cylinder P/N:M390023
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