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Dorman - First Stop Brake Master Cylinder P/N:M390447
$145.99
Convert the force from your brake pedal into the hydraulic pressure that actuates the braking system with the Dorman - First Stop Brake Master Cylinder M390447. It installs as a direct-fit replacement for the 1997-2000 Ford Escort and the 1997 Mercury Tracer.
- Core function: Pressurizes brake fluid and sends it through the lines to the wheel brakes each time the pedal is applied—the hydraulic heart of the brake system.
- Signs this part may need replacing: a gradually sinking or spongy pedal, having to pump the pedal for a firm feel, or brake-fluid seepage around the cylinder body. If a failed master cylinder is the cause, this unit replaces it—have the cause diagnosed first.
- Installation note: Bench-bleed the master cylinder before fitting, then bleed the brake system per the vehicle service procedure to remove trapped air.
Interchange: 18M827 · 83-34086 · 8334086 · M901061 · 100-2156 · 1002156 · M-81086 · M81086 · 13439 · 13-2629 · 132629 · 10-2629 · 102629 · 10-2859 · 102859 · 130.61085 · MC500430 · 355-54063 · 35554063 · F7CZ2140CD · NM55005B · MC390447 · F133518 · F134324 · MC134324. Manufacturer part number M390447.
This part cross-references / interchanges with the following part numbers:
18M827, 83-34086, M901061, 100-2156, M-81086, 13439, 13-2629, 10-2629, 10-2859, 130.61085, MC500430, 355-54063, F7CZ2140CD, NM55005B, MC390447, F133518, F134324, MC134324
Frequently Asked Questions
What does the brake master cylinder do?
It converts the force you apply at the brake pedal into hydraulic pressure, pushing brake fluid through the lines to operate the wheel brakes.
What vehicles does the M390447 fit?
It's a direct-fit replacement for the 1997-2000 Ford Escort and the 1997 Mercury Tracer. Check the Buyer's Guide tab to confirm it matches your vehicle.
What are signs my master cylinder may need replacing?
A gradually sinking or spongy pedal, having to pump the pedal for firm braking, or brake-fluid seepage around the cylinder body. Have the cause diagnosed before replacing.
Should I bleed the brakes after installing this?
Yes. Any time the hydraulic system is opened, bench-bleed the new master cylinder, then bleed the brake system per the vehicle service procedure to remove air.
What numbers does this master cylinder interchange with?
It cross-references numbers including 18M827, M901061, 100-2156, 13439, MC500430, F7CZ2140CD and more—see the full Interchange list on the listing.
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Dorman - First Stop Brake Master Cylinder P/N:M390447
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