Deliver steady hydraulic pressure to the brake system with the Dorman First Stop Brake Master Cylinder M390368, a brand-new brake master cylinder for the 1996-2000 Toyota 4Runner, including the 1997 model year. It is a direct-fit replacement for the 1996-2000 Toyota 4Runner (all engines), one per vehicle. It converts brake-pedal force into hydraulic pressure and sends it through its two outlets to the brake circuits.
The reservoir and sensor come included with this unit. Mounting hardware is not included, so consult the vehicle service information for the correct fasteners and the bleeding procedure. Country of origin: Taiwan.
Signs a master cylinder may need replacing include a soft or sinking brake pedal, brake fluid seeping around the cylinder, or a fluid level that keeps dropping. Other brake components can cause the same symptoms, so diagnose the system before replacing parts.
Interchange: 83-22728 · 100-1658 · M-56728 · 072-9148 · 13-2831 · 11-2831 · 130.44728 · 355-76131
8322728 · 1001658 · M56728 · 0729148 · 132831 · 112831 · 13044728 · 35576131 · 18M797 · M901030 · 13215 · MC500100 · M55090 · NM55090 · MC390368 · 472013D350 · F131915 · MC131915
This part cross-references / interchanges with the following part numbers:
Is M390368 the right master cylinder for the 1996-2000 Toyota 4Runner, including the 1999 model?
It is listed for the 1996-2000 Toyota 4Runner (all engines), one per vehicle, so it covers the 1999 model year.
Does this master cylinder come with a reservoir?
Yes. The reservoir and sensor are both included with the master cylinder. Mounting hardware is not included.
What is this brake master cylinder made of?
The master cylinder is made of aluminum. All of its rubber components are made of an EPDM compound for resistance to glycol-based brake fluid.
What are the bore and outlet specifications?
It has a 1 in bore diameter and two outlets. The secondary outlet is threaded M10 x 1.0, and the primary outlet has a 1 mm thread pitch.
What signs suggest a master cylinder may need replacing?
A soft or sinking pedal, fluid seeping at the cylinder, or a steadily dropping fluid level may be signs. Other brake parts can cause these too, so diagnose the system first.
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.
