{"product_id":"dorman-m390303-brake-master-cylinder","title":"Dorman M390303 Brake Master Cylinder","description":"\u003ch2\u003eReliable Brake Master Cylinder for Chrysler, Jeep, and Plymouth Vehicles\u003c\/h2\u003e\u003cp\u003eThe Dorman M390303 Brake Master Cylinder is designed to restore proper brake function in select Chrysler, Jeep, and Plymouth models. Engineered with an aluminum body and a 1-inch bore diameter, this master cylinder ensures consistent hydraulic pressure for safe braking performance.\u003c\/p\u003e\u003ch2\u003eKey Features of the Dorman M390303 Brake Master Cylinder\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eConstructed from durable aluminum for corrosion resistance and longevity\u003c\/li\u003e\n\u003cli\u003eIncludes reservoir for fluid storage and easy maintenance\u003c\/li\u003e\n\u003cli\u003eTwo outlet ports with rearward outlet size M10 x 1.0 and secondary outlet thread diameter M12 x 1.0\u003c\/li\u003e\n\u003cli\u003e1-inch master cylinder bore diameter for precise hydraulic control\u003c\/li\u003e\n\u003cli\u003ePackage contains the master cylinder only; mounting hardware not included\u003c\/li\u003e\n\u003cli\u003eCompatible with Chrysler Cherokee, Jeep Grand Cherokee, and Plymouth Prowler models\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe Dorman M390303 Brake Master Cylinder is a critical component in the brake hydraulics system, responsible for converting pedal force into hydraulic pressure. Its aluminum construction offers a balance of strength and corrosion resistance, suitable for the demanding conditions faced by Chrysler Cherokee, Jeep Grand Cherokee, and Plymouth Prowler vehicles. The included reservoir simplifies brake fluid management, while the two outlet ports with specific thread sizes (M10 x 1.0 rearward outlet and M12 x 1.0 secondary outlet) ensure compatibility with factory brake lines. This master cylinder features a 1-inch bore diameter, providing the necessary hydraulic pressure for effective braking response.\u003c\/p\u003e\u003ch2\u003eCommon Issues Addressed by This Brake Master Cylinder\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBrake pedal sinking or sponginess due to internal seal failure\u003c\/li\u003e\n\u003cli\u003eBrake fluid leaks from a worn or damaged master cylinder\u003c\/li\u003e\n\u003cli\u003eReduced braking efficiency caused by insufficient hydraulic pressure\u003c\/li\u003e\n\u003cli\u003eBrake warning light activation related to master cylinder malfunction\u003c\/li\u003e\n\u003cli\u003eInconsistent brake pedal feel or travel distance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure brake system is properly bled after installation to remove air\u003c\/li\u003e\n\u003cli\u003eVerify thread sizes (M10 x 1.0 and M12 x 1.0) match vehicle brake line fittings\u003c\/li\u003e\n\u003cli\u003eUse recommended brake fluid type for Chrysler, Jeep, and Plymouth models\u003c\/li\u003e\n\u003cli\u003eInspect related brake components for wear during replacement\u003c\/li\u003e\n\u003cli\u003eMounting hardware is not included; retain original hardware or source separately\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty Information\u003c\/h2\u003e\u003cp\u003eDorman manufactures the M390303 Brake Master Cylinder to meet or exceed OEM specifications for Chrysler Cherokee, Jeep Grand Cherokee, and Plymouth Prowler vehicles. While mounting hardware is not included, the product undergoes rigorous quality control to ensure reliable performance. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":43792151412917,"sku":"BKKX-M390303","price":70.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DB_M390303_Fro.jpg?v=1774997569","url":"https:\/\/www.partcatalog.com\/products\/dorman-m390303-brake-master-cylinder","provider":"PartCatalog","version":"1.0","type":"link"}