Dorman - First Stop Brake Master Cylinder P/N:M39704
Turn every press of the pedal into hydraulic pressure at the wheels with the Dorman First Stop Brake Master Cylinder M630191. It is a direct-fit 2001-2005 Kia Optima master cylinder that also fits the 1999-2003 Hyundai Sonata, all engines. The listed applications use one unit per vehicle.
Dorman engineered this master cylinder to replicate the original unit's design, function and performance on the listed applications. It is built from new, high-quality materials for a safe, durable replacement, and it comes with the reservoir and sensor included.
Specifications: 0.938-inch bore diameter; four outlets; M16 x 1.5 and M10 x 1.0 outlet threads; reservoir included; sensor included; mounting hardware not included. Consult the vehicle service information for the correct fasteners and whether they may be reused. Country of origin: China.
Interchange: 83-16720 · 100-2031 · M-52720 · 13-3018 · 11-3018 · 130.51020 · 131.51020 · 355-03020
8316720 · 1002031 · M52720 · 133018 · 113018 · 13051020 · 13151020 · 35503020 · MC500540 · 5851038004 · M55154 · M55200 · NM55154 · NM55200 · MC390728 · F134572 · MC134572
This part cross-references / interchanges with the following part numbers:
Is this the right Hyundai Sonata brake master cylinder for a 1999-2003 Hyundai Sonata?
It is a direct-fit replacement for the 1999-2003 Hyundai Sonata and the 2001-2005 Kia Optima, all engines. Check the Buyer's Guide tab to confirm your vehicle.
What does a brake master cylinder do?
It converts force from the brake pedal into hydraulic pressure and sends brake fluid through the lines to the brakes at each wheel.
What comes in the box?
The package contains the master cylinder with the reservoir and a sensor included. Mounting hardware is not included, so consult the vehicle service information for the correct fasteners.
What are the key specifications?
It has an aluminum housing, a 0.938-inch bore and four outlets with M16 x 1.5 and M10 x 1.0 outlet threads. Its rubber components use an EPDM compound that resists glycol-based brake fluid.
What signs mean a master cylinder may need replacing?
A spongy or slowly sinking pedal, fluid leaking at the master cylinder or a dropping fluid level can be signs. Other brake faults can cause these too, so diagnose the cause before replacing.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.