{"product_id":"mpa-electrical-b3427-power-brake-booster","title":"MPA Electrical B3427 Power Brake Booster","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eMPA Electrical B3427 is a remanufactured vacuum power brake booster built for direct brake assist replacement where the master cylinder is not included. It is engineered to deliver strong vacuum-assisted braking with reduced pedal effort and is tested at the end of production for consistent performance.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eVacuum booster design for power-assisted braking\u003c\/li\u003e\n\u003cli\u003eStandard replacement brake service grade\u003c\/li\u003e\n\u003cli\u003eRemanufactured metal housing\u003c\/li\u003e\n\u003cli\u003e8.55 in. diaphragm diameter for brake assist output\u003c\/li\u003e\n\u003cli\u003e8 x 1.25 mm master cylinder stud thread size\u003c\/li\u003e\n\u003cli\u003eTwo mounting studs for secure installation\u003c\/li\u003e\n\u003cli\u003eMaster cylinder, gasket, seal, and pedal rod extension not included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details\u003c\/h2\u003e\u003cp\u003eThis MPA Electrical brake booster is built as a remanufactured replacement for applications that use a vacuum-operated booster assembly. The B3427 is designed to restore braking assist by helping the driver apply the brakes with less pedal force while maintaining reliable vacuum sealing and pressure transfer. It cross-references 4721005W10 for the same application.\u003c\/p\u003e\u003cp\u003eCompatible with 1981 Nissan 720, this power brake booster supports a direct replacement repair for a vehicle with reduced brake assist or a failed booster assembly. The metal housing and tested remanufactured construction make it a practical choice for restoring original braking function on the Nissan 720.\u003c\/p\u003e\u003ch2\u003eCommon Repair Symptoms\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eHard brake pedal feel\u003c\/li\u003e\n\u003cli\u003eReduced brake assist\u003c\/li\u003e\n\u003cli\u003eVacuum leak at the booster\u003c\/li\u003e\n\u003cli\u003eInconsistent pedal response\u003c\/li\u003e\n\u003cli\u003eFailed booster diaphragm or seal\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eVerify master cylinder stud thread size, mounting stud layout, and booster-to-firewall fitment before installation. This unit does not include the master cylinder, gasket, seal, mounting bracket, or pedal rod extension, so reuse or source those components separately as required by the application. Confirm the brake system is properly bled and check for vacuum integrity after installation.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eMPA Electrical subjects each unit to 100% end-of-line testing using proprietary test equipment to verify performance before release.\u003c\/p\u003e","brand":"MPA Electrical","offers":[{"title":"Default Title","offer_id":53540932550837,"sku":"FQTW-B3427","price":140.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/MV_B3427_Fro.jpg?v=1792216686","url":"https:\/\/www.partcatalog.com\/products\/mpa-electrical-b3427-power-brake-booster","provider":"PartCatalog","version":"1.0","type":"link"}