Hyundai Coupe (GK) Front Brake Discs

When sourcing parts for vintage vehicles, the biggest fear is settling for "good enough". This front brake disc with part number 517122G000 was molded based on the original factory specifications for the 2002 to 2008 Hyundai Coupe. We even performed reverse scanning to capture the height difference of the mating surface for the wheel hub flange. The disc boasts a diameter of 300 millimeters and a thickness of 28 millimeters, featuring a fully ventilated design. Its center bore and the 114.3-millimeter pitch circle diameter for the five bolts fit perfectly with the original brake calipers and mud guards, eliminating uneven wear and mechanical interference.

We never cut corners on material costs. The disc base is crafted from HT250 high-carbon low-alloy gray cast iron, with the carbon equivalent controlled at approximately 3.3%, and Type A flake graphite accounting for over 90% of its metallographic structure. This delivers two tangible advantages: the friction surface boasts high toughness, resisting thermal cracking even under sustained heavy braking; it also delivers excellent vibration damping, enabling quiet operation with both stock semi-metallic brake pads and upgraded ceramic pads without squealing noises. The ventilated ribs retain the original factory curved profile, consisting of 40 variable cross-section ribs that maintain uncompromised air pumping efficiency. During continuous downhill mountain driving, heat dissipates rapidly, preventing the disc temperature from spiking into the critical overheating range. Simply put, this is far more than a generic metal disc that merely fits the vehicle-it fully replicates the factory's original heat dissipation, NVH (Noise, Vibration and Harshness) and strength performance curves.

Most low-cost brake discs on the market only adopt a single layer of ordinary epoxy paint. During the 20 to 40-day ocean shipping under high-humidity and salt spray marine conditions, the wheel mounting bases and flange positions are highly prone to rust upon arrival at ports, leading to an extremely high customer return rate. We have customized a dual-layer composite spraying process consisting of waterborne epoxy zinc-rich primer and UV-curable acrylic polyurethane topcoat for the front brake disc OE517122G000 of Hyundai Coupe GK. This full set of processes fully complies with the EU low-VOC environmental requirements and represents the mainstream upgraded coating solution for overseas auto parts markets in 2026.

Professional anti-corrosion advantages of the base coat: The dry film zinc content of the waterborne epoxy zinc-rich primer is no less than 72%, forming a cathodic protective barrier layer. Even if the coating suffers minor bumps and damages during transportation, it can prevent rust from spreading to the substrate. Its basic salt spray test performance reaches 800 hours, far exceeding the industry minimum standard of 150 hours for ordinary paint coatings. No rust spots will appear on flanges after 6 months of long-term storage in overseas warehouses.

Core highlights of the top UV-curable finish: Different from traditional high-temperature baking paints, the UV coating is fully cured by ultraviolet light within only 3 to 5 seconds without baking at temperatures above 280°C, eliminating thermal deformation of the precise dimensions of brake discs. The coating thickness ranges from 0.04 mm to 0.06 mm with Grade 1 adhesion. No paint peeling or flaking occurs at the wheel fitting areas after installation, and the flanges and central shafts can retain intact anti-rust coatings for a long time in rainy, snowy and coastal salt spray environments.

Practical application advantages (colloquial expression): Many repair shops report that the coating on the friction surfaces of ordinary painted discs peels off rapidly after traveling several hundred kilometers post-installation. Rust mixed into brake pads will generate harsh squealing noises. Our product features full coating only on non-friction working surfaces, with bare uncoated brake friction surfaces. No pre-grinding is required, allowing direct installation and saving labor hours for repair shops. The entire coating system contains no pungent volatile solvents, complying with European and American environmental testing standards throughout production, warehousing and ocean transportation, thus avoiding customs clearance delays caused by random inspections of environmental materials.

Compatible Vehicle Models

This brake disc is compatible with a wide range of car models, as follows:

Cross Reference Part Number Table

How do we convert 517122G000 from molten iron into brake discs in the workshop?

Components carry their own character, all thanks to the craftsmanship of workshop workers. This dedicated processing line built exclusively for 517122G000 may not look like something out of a sci-fi blockbuster, yet every key workstation delivers uncompromising performance. The casting process adopts cold-box sand cores paired with electric furnace melting. Samples are taken for spectrometric analysis before the molten iron is tapped from the furnace, enabling real-time fine-tuning of over a dozen elements including carbon, silicon, manganese, sulfur, copper and tin. Test reports taken at the furnace are directly linked to the furnace batch number, so anyone can trace the origin of each cast blank produced from sand casting.

In the precision machining stage, a dual-turret CNC vertical lathe completes machining of the friction surface, positioning end face and central bore in a single clamping setup, which keeps the runout of the mounting end face controlled within 5 microns. Most cases of brake judder stem from excessive end face runout of the disc, and this machining step is the critical solution to eliminate judder. Afterwards, every single disc goes through an automatic dynamic balancing machine, with residual unbalance reduced to no more than 12 gram-centimeters. Even at high driving speeds, no faint tingling vibration will be transmitted to the steering wheel. Before offloading, there is a mandatory 100% inspection process with no random sampling allowed: DTV (Disc Thickness Variation) testing is performed on the friction surface, with the thickness difference standard capped at 5 microns, alongside cross-hatch adhesion testing for coating layers. Only after completing all these procedures can stamping be marked on the disc hub, and this serial marking serves as its unique identification credential.

6.Official Warranty Standard: This OE517122G000 front brake rotor for Coolpad GK comes with a uniform 80,000-kilometer driving warranty covering three types of original manufacturing defects: casting cracks, dimensional deviations from machining, and extensive coating peeling. Natural wear from regular friction and thermal cracks caused by aggressive high-performance driving are excluded from warranty coverage. Clear warranty limitations will be specified prior to purchase to prevent subsequent disputes.

Packaging Standards: Each piece is fully wrapped and protected by OPP pearl cotton. Sets of two pieces can be packed in neutral color boxes or customized brand color boxes as required. Outer cartons are thickened five-layer corrugated cartons filled with cushioning foam inside, preventing extrusion and deformation during stacking for sea transportation. Each carton is labeled with the exclusive OE code 517122G000 to facilitate quick sorting at overseas warehouses and avoid confusion with brake discs for other vehicle models.

We don't engage in misleading wordplay when it comes to after-sales service. Once the brake rotor is installed, if there's runout on the measuring end and no scratches on the rotor surface, any deformation or hidden cracks arising from non-human-induced warping or abnormal wear during regular use qualify for a free replacement within two years with unlimited mileage, and we cover all round-trip shipping fees. Customers won't need to go through the hassle of sending the rotor back for inspection before getting a replacement-simply shoot a video showing the vibration and attach the measured readings from the runout gauge. Once we confirm the issue lies with the rotor, a new one will be shipped out the same day. Other brands only offer a one-year warranty for front rotors on Coupes, yet we confidently provide a two-year warranty, all thanks to our rigorous full-inspection process in the workshop. In cases where brake rotors get scored due to sticking calipers or abnormal brake pad material, our technical team will issue a diagnostic report, break down the root cause in detail, and walk you through the adjustment steps, rather than merely shifting blame onto customers.

Q1: Is brake disc OE517122G000 only compatible with Hyundai Coupe GK? Can it be used on other Hyundai models?
A: This part number corresponds to the exclusive front brake rotor for the second-generation Hyundai Coupe GK. It only fits 2001-2009 GK chassis vehicles equipped with 1.6L, 2.0L and 2.7 V6 engines. It cannot be interchanged with Hyundai Genesis Coupe, Tucson, Sonata and other models due to mismatched mounting hole spacing and disc thickness. You may provide your vehicle VIN before placing an order, and we will check the matching model for free to prevent incorrect shipments.

Q: Can I just replace one side of the front brake discs on my Coolpad car?
A: You really shouldn't do that. Apart from uneven left and right braking force pulling the car to one side when braking, the critical issue is mismatched heat capacity and friction coefficients between the two discs. During an emergency stop, this can instantly twist the front of the vehicle sideways. Always replace them in pairs-swap out both the left and right front discs together. It is also best to install new brake pads on both sides at the same time; they will wear in with one another to deliver optimal braking performance.

Q: How does pairing 517122G000 with ceramic brake pads work out?
A: It's an excellent match. Many owners of older Coolpad vehicles complain that the original semi-metallic brake pads generate excessive dust and squeal occasionally. After switching to low-metallic ceramic brake pads paired with this rotor's high-carbon grey cast iron body, braking becomes quiet and progressive, and wheel rims stay clean. You can use them without worry as long as the brake pads pass ECE R90 certification.

Over the past two years, the upgrading of eco-friendly coatings for brake discs has been an underlying trend across the entire industry. The Euro 7 draft regulation has incorporated brake particulate emissions into evaluation criteria, putting immense pressure on replacement discs for numerous older vehicle models to switch their coating processes from solvent-based systems to water-based VOC-free alternatives. Our electrocoating plus silver powder paint solution for part number 517122G000 contains no heavy metals such as lead and hexavalent chromium by design, making it pre-compliant with the latest access standards for the aftermarkets in Europe and the United States. In the next three years, geometric textured coatings are expected to become mainstream on the non-friction surfaces of brake discs; such coatings deliver rust protection while facilitating tire heat dissipation, and we are already conducting validation tests for this technical reserve.

Here is a maintenance tip for owners of older Coupes: the first 300 kilometers after installing new brake discs constitute the critical break-in period. During this stage, avoid hard emergency braking. Instead, apply the brakes gradually to form an even transfer film on the disc surface. Before parking each night, refrain from engaging the parking brake while the brake rotors and pads are still scorching hot-allow the brakes ample time to cool down fully. This practice will further boost the flatness and deformation-resistant service life of the 517122G000 brake disc. Even an aging vehicle can deliver a satisfying driving experience if equipped with quality replacement parts.

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