{"product_id":"hella-355109822-vented-disc-brake-rotor-330mm","title":"Hella 355109822 Vented Disc Brake Rotor 330mm","description":"\u003cp class=\"nvn-hero\"\u003eHella's 355109822 is a vented, one-piece disc brake rotor built to original-equipment dimensions. It's 330 millimeters across, 28 millimeters thick, cast from gray iron and zinc-coated to fight corrosion. Sold as a single rotor, so grab two for a full axle. Confirm fitment by the part number before you order.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eHella has been making braking and lighting components for European vehicles for a long time, and this disc brake rotor carries that same fit-and-forget engineering. Part number 355109822 is a vented, one-piece rotor measuring 330 millimeters across the outside diameter, 28 millimeters thick, with a hat height of 73.70 millimeters and an 85 millimeter hub size. It's cast from gray cast iron and finished with a zinc coating on the non-friction surfaces. In plain terms, it's a quality replacement rotor built to original-equipment dimensions for the vehicles that run this size.\u003c\/p\u003e\n\u003cp\u003eThe vented design is the part that does the real work. Two friction faces with cooling vanes cast between them let air move through the rotor as the wheel turns. That airflow pulls heat out of the disc every time you get on the brakes hard, which keeps the rotor and the pads working in their happy range. Heat is what fades brakes and warps thin rotors, so a properly vented 28 millimeter disc gives you consistent pedal feel on a long grade or in stop-and-go traffic. The one-piece casting keeps it simple and strong. No separate hat, no fasteners to work loose, just a single machined casting that bolts up the way the factory rotor did.\u003c\/p\u003e\n\u003cp\u003eThe zinc coating is a nice touch you'll appreciate a few months in. Bare cast iron rotors start surface-rusting almost the moment they're out of the box, especially the hat, the edges, and the cooling vanes where no pad ever wipes them clean. Hella coats those areas so the rotor still looks sharp behind an open wheel and, more importantly, resists the corrosion that can flake into the vents over time. The friction surface itself wears in clean once you drive it, same as any rotor.\u003c\/p\u003e\n\u003cp\u003eA few numbers matter when you're ordering. This is a single rotor. One disc, not a pair. Brakes work as an axle set, so if you're refreshing the fronts or the rears you'll want two of these plus a set of pads to match. The wheel bolt pattern is listed at 7 by 130 millimeters and the hub bore is 85 millimeters, and those are the figures that decide whether it seats correctly on your hub. We always tell folks the same thing. Don't order a rotor off a photo. Confirm the Hella part number 355109822 against your specific year, make, and model, or match it to the rotor you're pulling off. The 330 by 28 millimeter vented size is common on European performance SUVs and sedans, and it shows up on both front and rear axles depending on the platform, so the part number is your source of truth, not the diameter alone.\u003c\/p\u003e\n\u003cp\u003eInstallation is straightforward for anyone who's done a brake job. Pull the caliper and bracket, slide off the old rotor, and clean the hub face down to bare metal so the new rotor sits flat. A high spot from rust or old adhesive is the number one cause of a pulsing pedal on a fresh rotor, so take your time there. Wipe the protective film off the new friction surfaces with brake cleaner before you install. Torque the caliper bracket and guide bolts to the manufacturer's spec, not by feel. And if you're putting new pads on at the same time, which you almost always should when you replace rotors, bed them in properly. A series of moderate stops from moderate speed lays down an even transfer layer before you ever do a hard stop. That bed-in step is what gives you quiet, smooth braking instead of squeal and judder.\u003c\/p\u003e\n\u003cp\u003eWho's this for? Anyone replacing a worn, warped, or corroded rotor and wanting an OE-quality part without paying a dealer markup. It's a direct-fit style replacement, so you're not modifying anything. If your current rotors are below the minimum thickness stamped on the hat, or you've got a shudder through the pedal under braking, it's time. Rotors are a wear item, and running them past their limit costs you pads and stopping distance. Get the fitment confirmed by part number, buy them in pairs, pair them with fresh pads, and you'll have solid, quiet brakes again.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003e330 millimeter outside diameter with 28 millimeter nominal thickness, built to original-equipment dimensions\u003c\/li\u003e\n  \u003cli\u003eVented two-face design channels heat away from the disc for consistent pedal feel and less fade\u003c\/li\u003e\n  \u003cli\u003eOne-piece gray cast iron casting, no separate hat or fasteners to work loose\u003c\/li\u003e\n  \u003cli\u003eZinc coating on the non-friction surfaces resists rust on the hat, edges, and cooling vanes\u003c\/li\u003e\n  \u003cli\u003e85 millimeter hub size and 7 x 130 millimeter wheel bolt pattern as listed by the manufacturer\u003c\/li\u003e\n  \u003cli\u003e73.70 millimeter hat height for a direct-fit replacement on matching applications\u003c\/li\u003e\n  \u003cli\u003eSold as a single rotor, so order two to do a full axle set\u003c\/li\u003e\n  \u003cli\u003eHella fit-and-forget engineering for a quiet, OE-quality brake job\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"nvn-trust\"\u003e\n  \u003ch2\u003eWhy Buy from NVN Marine\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eAuthorized Hella Marine reseller, full manufacturer warranty\u003c\/li\u003e\n    \u003cli\u003eNMEA member and ABYC certified, advice from real boat techs\u003c\/li\u003e\n    \u003cli\u003eSame-day shipping before 3 PM ET on in-stock items\u003c\/li\u003e\n    \u003cli\u003eNY headquarters and Fort Lauderdale flagship retail store\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"nvn-faq\"\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the exact dimensions of this rotor?\u003c\/summary\u003e\n    \u003cp\u003eIt's 330 millimeters across the outside diameter, 28 millimeters nominal thickness, with a 73.70 millimeter hat height and an 85 millimeter hub size. That works out to roughly 12.99 inches diameter and 1.1 inches thick.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this sold as a pair or a single rotor?\u003c\/summary\u003e\n    \u003cp\u003eSingle. You get one disc brake rotor. Brakes work as an axle set, so to refresh a full axle you'll want two of these plus a matching set of pads.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat is the wheel bolt pattern and hub size?\u003c\/summary\u003e\n    \u003cp\u003eThe manufacturer lists a 7 by 130 millimeter wheel bolt pattern and an 85 millimeter hub bore. Those are the numbers that decide whether it seats on your hub, so match them to your vehicle before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this a vented rotor?\u003c\/summary\u003e\n    \u003cp\u003eYes. It's a vented one-piece design with cooling vanes cast between the two friction faces. Air moving through the rotor pulls heat out under braking, which helps prevent fade and warping.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat is the zinc coating for?\u003c\/summary\u003e\n    \u003cp\u003eIt protects the non-friction surfaces, the hat, the edges, and the vents, from surface rust. The friction face wears in clean once you drive it, but the coated areas keep the rotor from corroding where no pad ever touches it.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes it come with mounting hardware or bolts?\u003c\/summary\u003e\n    \u003cp\u003eThis is listed as the rotor only. Mounting hardware and caliper bolts aren't part of the rotor description, so reuse your existing hardware or source it separately if yours is worn.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I know it fits my vehicle?\u003c\/summary\u003e\n    \u003cp\u003eConfirm the Hella part number 355109822 against your specific year, make, and model, or match it to the rotor you're pulling off. The 330 by 28 millimeter size shows up on several European platforms, so the part number is the source of truth, not the diameter alone.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eShould I replace rotors in pairs?\u003c\/summary\u003e\n    \u003cp\u003eYes. Always replace rotors as an axle set so both sides brake evenly. Mixing a fresh rotor with a worn one on the same axle can cause a pull and uneven pad wear.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDo I need to bed in the new rotor?\u003c\/summary\u003e\n    \u003cp\u003eIf you're fitting new pads at the same time, yes. Run a series of moderate stops from moderate speed to lay down an even transfer layer before any hard braking. That's what gives you quiet, smooth stops instead of squeal or judder.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat material is the rotor made from?\u003c\/summary\u003e\n    \u003cp\u003eZinc-coated gray cast iron. Gray cast iron is the standard material for street brake rotors because it sheds heat well and machines to a smooth friction surface.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should I replace a brake rotor?\u003c\/summary\u003e\n    \u003cp\u003eReplace it if it's below the minimum thickness stamped on the hat, if you feel a shudder or pulsing through the pedal under braking, or if it's deeply scored or heavily corroded. Rotors are a wear item and running them past their limit costs you pads and stopping distance.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"nvn-specs\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eTitle\u003c\/th\u003e\n\u003ctd\u003eHella 355109822 Vented Disc Brake Rotor, 330mm x 28mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eHella Marine\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003e355109822\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e4082300573459\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eDisc Type\u003c\/th\u003e\n\u003ctd\u003eVented\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eDesign\u003c\/th\u003e\n\u003ctd\u003eOne Piece\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOutside Diameter\u003c\/th\u003e\n\u003ctd\u003e330 mm (12.99 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eNominal Thickness\u003c\/th\u003e\n\u003ctd\u003e28 mm (1.1 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eHeight\u003c\/th\u003e\n\u003ctd\u003e73.70 mm (2.90 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eHub Size\u003c\/th\u003e\n\u003ctd\u003e85 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eWheel Bolt Pattern\u003c\/th\u003e\n\u003ctd\u003e7 x 130 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eZinc Coated Gray Cast Iron\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003ctd\u003eSingle\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eDisc Brake Rotor\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What are the exact dimensions of this rotor?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's 330 millimeters across the outside diameter, 28 millimeters nominal thickness, with a 73.70 millimeter hat height and an 85 millimeter hub size. That works out to roughly 12.99 inches diameter and 1.1 inches thick.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is this sold as a pair or a single rotor?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Single. You get one disc brake rotor. Brakes work as an axle set, so to refresh a full axle you'll want two of these plus a matching set of pads.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What is the wheel bolt pattern and hub size?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The manufacturer lists a 7 by 130 millimeter wheel bolt pattern and an 85 millimeter hub bore. Those are the numbers that decide whether it seats on your hub, so match them to your vehicle before ordering.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is this a vented rotor?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. It's a vented one-piece design with cooling vanes cast between the two friction faces. Air moving through the rotor pulls heat out under braking, which helps prevent fade and warping.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What is the zinc coating for?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It protects the non-friction surfaces, the hat, the edges, and the vents, from surface rust. The friction face wears in clean once you drive it, but the coated areas keep the rotor from corroding where no pad ever touches it.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does it come with mounting hardware or bolts?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"This is listed as the rotor only. Mounting hardware and caliper bolts aren't part of the rotor description, so reuse your existing hardware or source it separately if yours is worn.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How do I know it fits my vehicle?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Confirm the Hella part number 355109822 against your specific year, make, and model, or match it to the rotor you're pulling off. The 330 by 28 millimeter size shows up on several European platforms, so the part number is the source of truth, not the diameter alone.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Should I replace rotors in pairs?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. Always replace rotors as an axle set so both sides brake evenly. Mixing a fresh rotor with a worn one on the same axle can cause a pull and uneven pad wear.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Do I need to bed in the new rotor?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"If you're fitting new pads at the same time, yes. Run a series of moderate stops from moderate speed to lay down an even transfer layer before any hard braking. That's what gives you quiet, smooth stops instead of squeal or judder.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What material is the rotor made from?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Zinc-coated gray cast iron. Gray cast iron is the standard material for street brake rotors because it sheds heat well and machines to a smooth friction surface.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"When should I replace a brake rotor?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Replace it if it's below the minimum thickness stamped on the hat, if you feel a shudder or pulsing through the pedal under braking, or if it's deeply scored or heavily corroded. Rotors are a wear item and running them past their limit costs you pads and stopping distance.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Hella Marine","offers":[{"title":"Default Title","offer_id":45061962137693,"sku":"2008624","price":68.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_6ff01881-8500-40b0-a68a-a2c2821b417c.jpg?v=1789565762","url":"https:\/\/nvnmarine.com\/products\/hella-355109822-vented-disc-brake-rotor-330mm","provider":"NVN Marine","version":"1.0","type":"link"}