{"product_id":"master-cylinder-r107","title":"Master Cylinder - Late - R107 SL","description":"\u003cp\u003eBrake master cylinder for the Mercedes-Benz R107 SL, late build only.\u003c\/p\u003e\u003ch3\u003ePart numbers\u003c\/h3\u003e\u003cp\u003eOE 0044307501. Cross-references 0044303801, 0044305501.\u003c\/p\u003e\u003ch3\u003eFits\u003c\/h3\u003e\u003cp\u003e300SL, 420SL and 500SL specifically, from September 1985 onward. Earlier 280SL, 350SL and 380SL trucks use a different master cylinder, not yet sourced, don't fit this one to an earlier car.\u003c\/p\u003e\u003ch3\u003eWhy it matters\u003c\/h3\u003e\u003cp\u003eA worn or leaking master cylinder shows up as a soft or sinking brake pedal, sometimes gradually enough that it's mistaken for normal wear until it's a genuine safety concern. Not a part worth waiting on once it starts.\u003c\/p\u003e\u003ch3\u003eWhat you get\u003c\/h3\u003e\u003cp\u003eOne brake master cylinder, 19.05mm piston diameter.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eNot sure it's right for your car? Send us your VIN and we'll confirm before you order.\u003c\/em\u003e\u003c\/p\u003e","brand":"Obscure Parts","offers":[{"title":"Default Title","offer_id":49778879561978,"sku":"OBSAE-R107-00028","price":469.0,"currency_code":"AED","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/5131\/8266\/files\/Screenshot2026-07-29102424.png?v=1785306313","url":"https:\/\/obscureparts.com\/products\/master-cylinder-r107","provider":"Obscure Parts","version":"1.0","type":"link"}