{"product_id":"jp-group-brake-master-cylinder-23-8mm-audi-100-443611021-jp-3164-0","title":"JP Group Brake Master Cylinder, 23.8 mm (15\/16 in) Tandem | Audi 100 1989–1990 | OE 443 611 021 (JP-3164-0)","description":"\u003ch2\u003eJP Group Brake Master Cylinder, 23.8 mm — Audi 100 1989–1990, OE 443 611 021 (JP-3164-0)\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eShort answer:\u003c\/strong\u003e JP Group JP-3164-0 is a new tandem (dual-circuit) brake master cylinder with a 23.8 mm (15\/16 in) bore. It replaces OE 443 611 021 (JP ref 1161100200) and is listed by EMPI for the 1989–1990 Audi 100. It bolts to the brake booster and feeds both brake circuits. Sold each, with no core charge.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eVehicle\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1989–1990\u003c\/td\u003e\n\u003ctd\u003eAudi 100 (C3)\u003c\/td\u003e\n\u003ctd\u003eEMPI fitment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOther years\u003c\/td\u003e\n\u003ctd\u003eAudi 100 \/ 200 \/ 5000 (C3) and related models using 443 611 021\u003c\/td\u003e\n\u003ctd\u003eEuropean catalogs list the same OE number on more C3-platform cars. \u003cstrong\u003eNot confirmed\u003c\/strong\u003e by EMPI. Compare bore size, port layout and reservoir.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1980–1991\u003c\/td\u003e\n\u003ctd\u003eVW Vanagon\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eNot this part\u003c\/strong\u003e. The Vanagon 23.8 mm master cylinder is OE 251 611 021 C.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAny\u003c\/td\u003e\n\u003ctd\u003eCars with ABS-specific master cylinders\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eConfirm first\u003c\/strong\u003e. Some ABS cars use a different unit.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart number\u003c\/td\u003e\n\u003ctd\u003eJP Group JP-3164-0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOE reference\u003c\/td\u003e\n\u003ctd\u003e443 611 021\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJP Group reference\u003c\/td\u003e\n\u003ctd\u003e1161100200\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e707924541465\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBore\u003c\/td\u003e\n\u003ctd\u003e23.8 mm (15\/16 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eTandem, dual circuit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCondition\u003c\/td\u003e\n\u003ctd\u003eNew, no core\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSold as\u003c\/td\u003e\n\u003ctd\u003eEach\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping weight\u003c\/td\u003e\n\u003ctd\u003e1.2 lb (EMPI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage\u003c\/td\u003e\n\u003ctd\u003e9 x 4 x 3 in (EMPI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eOne brake master cylinder\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eNot Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFluid reservoir and reservoir grommets (reuse yours or buy new)\u003c\/li\u003e\n\u003cli\u003eBooster seal \/ O-ring and mounting nuts\u003c\/li\u003e\n\u003cli\u003eBrake fluid\u003c\/li\u003e\n\u003cli\u003eBrake lines\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy It Matters\u003c\/h3\u003e\u003cp\u003eThe master cylinder turns pedal pressure into hydraulic pressure for all four brakes. As the internal seals wear, fluid gets past the pistons. You may notice the pedal slowly sinking toward the floor while you hold it at a stop, a soft or spongy pedal that firms up with pumping, the brake warning light coming on, fluid on the booster or below the master cylinder, or longer stopping distances. A leaking master cylinder can also strip the paint from the booster. Because this part affects every brake on the car, a failing master cylinder should be replaced right away.\u003c\/p\u003e\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBench-bleed the new master cylinder before you install it. This makes the bleed on the car much faster.\u003c\/li\u003e\n\u003cli\u003eUse flare-nut wrenches on the brake lines to avoid rounding the fittings, and cap the lines to keep dirt out.\u003c\/li\u003e\n\u003cli\u003eFit new reservoir grommets, and a new booster seal if your car uses one.\u003c\/li\u003e\n\u003cli\u003eBleed all four corners with fresh DOT 4 fluid, starting with the wheel farthest from the master cylinder.\u003c\/li\u003e\n\u003cli\u003eCheck pedal height and feel and the warning light before you drive. Use the factory manual for nut torque.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it fit my 1990 Audi 100?\u003c\/strong\u003e\u003cbr\u003eYes. EMPI lists the 1989–1990 Audi 100.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this the same as OE 443 611 021?\u003c\/strong\u003e\u003cbr\u003eYes. JP Group cross-references JP-3164-0 to 443 611 021.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it fit an Audi 200 or 5000?\u003c\/strong\u003e\u003cbr\u003eSome versions use the same OE number, but EMPI has not confirmed it. Compare your old part.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it fit a VW Vanagon?\u003c\/strong\u003e\u003cbr\u003eNo. The Vanagon unit is 251 611 021 C.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it new or rebuilt?\u003c\/strong\u003e\u003cbr\u003eNew. There is no core to return.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat else do I need?\u003c\/strong\u003e\u003cbr\u003eDOT 4 brake fluid, reservoir grommets and a bench-bleed kit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it come with the reservoir?\u003c\/strong\u003e\u003cbr\u003eNo. It is the cylinder only.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cb\u003eExplore Related Categories\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"\/collections\/brakes\"\u003eBrakes \u0026amp; Components\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"wm-legal\"\u003e\u003csmall\u003eAudi® and model names are trademarks of AUDI AG. Washburn's Metal is not affiliated with or endorsed by Audi. Part numbers are for reference only.\u003c\/small\u003e\u003c\/p\u003e\n\u003cp\u003e\u003csmall\u003e\u003cb\u003eCalifornia Prop 65 Warning:\u003c\/b\u003e This product can expose you to chemicals which are known to the State of California to cause cancer and reproductive harm. For more information, visit \u003ca href=\"https:\/\/www.p65warnings.ca.gov\/\"\u003ewww.P65Warnings.ca.gov\u003c\/a\u003e.\u003c\/small\u003e\u003c\/p\u003e","brand":"JP Group","offers":[{"title":"Default Title","offer_id":67100818997363,"sku":"JP-3164-0","price":52.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/2760\/1523\/files\/JP-3164-0.jpg?v=1793697742","url":"https:\/\/www.washburnsmetal.com\/products\/jp-group-brake-master-cylinder-23-8mm-audi-100-443611021-jp-3164-0","provider":"Washburn's Metal","version":"1.0","type":"link"}