{"product_id":"zimmermann-400-3649-54-disc-brake-rotor-front-left","title":"Zimmermann 400.3649.54 Disc Brake Rotor - Front Left","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eZimmermann Black Z disc brake rotor 400.3649.54 is a slotted, coated rotor built for vehicles that use a 350 mm front-left brake disc. It combines a grooved braking surface with corrosion-resistant coating to support consistent braking performance in wet conditions and everyday driving.\u003c\/p\u003e\u003cp\u003eCompatible with Mercedes-Benz GL550, GL450, ML550, R500, R550, and ML500 applications, this rotor is part of the Black Z line and is engineered for a sporty appearance with functional dust and water evacuation. Part number 400.3649.54 is also referenced by multiple cross-number listings for the same application.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSlotted brake disc design helps move brake dust and water away from the friction surface.\u003c\/li\u003e\n\u003cli\u003eCoated surface adds corrosion resistance and preserves rotor appearance.\u003c\/li\u003e\n\u003cli\u003e350 mm outer diameter with 32 mm thickness for the specified application.\u003c\/li\u003e\n\u003cli\u003e67 mm hub bore and 112 mm bolt circle for fitment-specific installation.\u003c\/li\u003e\n\u003cli\u003eZimmermann Black Z rotor line combines street use with track-informed brake system development.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eThe Zimmermann 400.3649.54 rotor is a front-left disc brake rotor for select Mercedes-Benz GL-Class, ML-Class, and R-Class vehicles. Its slotted braking surface is intended to improve water and dust evacuation across the rotor face, while the coated finish helps resist corrosion and maintain a cleaner look over time. The Black Z product line focuses on a performance-oriented rotor design without changing the basic OE-style brake disc format.\u003c\/p\u003e\u003cp\u003eThis part cross-references Brembo 09.R103.11 and BBB Industries 17791 for the same application. The 400.3649.54 part number is used for fitment-specific ordering and identification, and the rotor is listed for Mercedes-Benz GL550, GL450, ML550, R500, R550, and ML500 front-left applications.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBrake fade caused by water buildup on the rotor face.\u003c\/li\u003e\n\u003cli\u003eReduced braking consistency in wet driving conditions.\u003c\/li\u003e\n\u003cli\u003eSurface corrosion on exposed brake disc components.\u003c\/li\u003e\n\u003cli\u003eUneven rotor appearance from long-term road exposure.\u003c\/li\u003e\n\u003cli\u003eFitment-specific replacement needs for worn front-left brake discs.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify rotor thickness, minimum thickness, hub bore, and bolt pattern before installation. This rotor is listed for front-left placement only, so confirm the vehicle application and side before ordering. Follow the vehicle manufacturer’s brake service procedures and inspect pads, caliper condition, and mating surfaces during replacement.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eZimmermann developed the Black Z rotor line using experience from standard brake rotor production and motorsport-informed engineering. The rotor is coated for anti-corrosion protection and is noted as not subject to registration when ECE R90 homologated.\u003c\/p\u003e","brand":"Zimmermann","offers":[{"title":"Default Title","offer_id":53534299062453,"sku":"BKND-400.3649.54","price":194.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/ZI_400364954_Fro.jpg?v=1792132590","url":"https:\/\/www.partcatalog.com\/products\/zimmermann-400-3649-54-disc-brake-rotor-front-left","provider":"PartCatalog","version":"1.0","type":"link"}