{"product_id":"zimmermann-400-5553-55-disc-brake-rotor-front","title":"Zimmermann 400.5553.55 Disc Brake Rotor - Front","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eThe Zimmermann 400.5553.55 disc brake rotor is built for direct fitment on the front axle of the Mercedes-Benz A35 AMG. It combines an internally vented design with a coated surface and ECE R90 approval for a precise OE-style replacement.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFits 2020-2021 Mercedes-Benz A35 AMG, front.\u003c\/li\u003e\n\u003cli\u003eInternally vented rotor design for improved heat management.\u003c\/li\u003e\n\u003cli\u003eCoated surface helps resist corrosion before installation.\u003c\/li\u003e\n\u003cli\u003eECE R90 approved for regulated replacement performance.\u003c\/li\u003e\n\u003cli\u003e350 mm outer diameter with 32 mm thickness.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eZimmermann part number 400.5553.55 is a disc brake rotor engineered around the listed dimensions and mounting pattern for the Mercedes-Benz A35 AMG. The 6\/5 hole arrangement, 112 mm bolt circle, 67 mm centering diameter, and 46 mm height support accurate alignment, while the internally vented construction helps move heat away from the braking surface during repeated stops. The coated finish adds a protective layer to the rotor surface, and the ECE R90 approval indicates compliance with recognized replacement standards. This part cross-references Mercedes-Benz OE number A 247 421 1000 for the same application.\u003c\/p\u003e\u003ch2\u003eCommon Replacement Issues\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBrake pulsation from rotor wear or thickness variation.\u003c\/li\u003e\n\u003cli\u003eReduced braking consistency from heat buildup.\u003c\/li\u003e\n\u003cli\u003eCorrosion on the rotor surface after service intervals.\u003c\/li\u003e\n\u003cli\u003eNoise or vibration caused by an out-of-spec brake disc.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eVerify rotor dimensions, bolt pattern, centering diameter, and minimum thickness before installation. Clean the hub mounting surface thoroughly and confirm the rotor seats flat without debris or corrosion. Match the rotor to the front position listed in the fitment data and inspect related brake components during service. Part number 400.5553.55 should be checked against the vehicle application before final assembly.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eZimmermann identifies this rotor as ECE R90 approved, supporting standardized replacement quality for the specified application. Part number 400.5553.55 is also paired with Zimmermann 400.5553.54 in the catalog for related fitment coverage.\u003c\/p\u003e","brand":"Zimmermann","offers":[{"title":"Default Title","offer_id":53546742907061,"sku":"BKND-400.5553.55","price":220.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/ZI_400555355_Fro.jpg?v=1792307623","url":"https:\/\/www.partcatalog.com\/products\/zimmermann-400-5553-55-disc-brake-rotor-front","provider":"PartCatalog","version":"1.0","type":"link"}