Built to turn pedal effort into hydraulic pressure for the brakes, the Dorman First Stop Brake Master Cylinder M390404 is a direct-fit Honda Prelude brake master cylinder for 1997-2001 models, and it also fits the 1998-1999 Acura RL and 1997-1998 Acura TL, all engines. Dorman precision-engineered this unit to replicate the design, function and performance of the original master cylinder on the listed applications. It is made from new, high-quality materials for a safe and durable repair.
Specifications: 1 in bore diameter, two outlets, secondary and rearward outlet threads of M10 x 1.0, and a primary outlet thread pitch of 1 mm. Country of origin: Taiwan.
In the box: One master cylinder. The reservoir, sensor and mounting hardware are not included. Consult the vehicle service information for the correct fasteners and whether the original reservoir may be transferred.
Signs a master cylinder may need replacing include a soft or sinking brake pedal, brake fluid leaking at the master cylinder, and a lit brake warning light. Diagnose the cause before replacing parts, and follow the service procedure for bleeding the brake system after installation.
What does a brake master cylinder do?
It converts force from the brake pedal into hydraulic pressure and sends brake fluid through its outlets to the brake lines. The Dorman M390404 has a 1 in bore and two outlets.
Will this Prelude master cylinder fit my 1997-2001 Honda Prelude?
Yes. M390404 is listed as a direct-fit replacement for the 1997-2001 Honda Prelude with all engines. Check the Buyer's Guide tab to confirm your exact vehicle.
Does the M390404 also fit Acura models?
Yes. It is also listed for the 1998-1999 Acura RL and the 1997-1998 Acura TL.
Is the brake fluid reservoir included?
No. The package contains the master cylinder only. The reservoir, sensor and mounting hardware are not included, so follow the service procedure for transferring or replacing them.
What materials is this master cylinder made from?
The housing is aluminum, and every rubber component uses a high-quality EPDM compound that resists glycol-based brake fluid. The unit is 100% new and made to meet SAE International standards.
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.
