Front Brake Discs for Kia Opirus

This product is the front brake disc for the Kia Opirus (original OEM part number 5171239910, also known as a brake rotor in the industry; it constitutes the core friction component of automotive brakes). It is a dedicated front axle brake replacement developed specifically for the first-generation Kia Opirus model (marketed as the Kia Amanti in North America), precisely matching the original brake system specifications of 2004–2010 models equipped with 3.5L or 3.8L V6 engines. As a certified aftermarket replacement identical to the original part, this brake disc features a ventilated design with an initial diameter of 300 mm and thickness of 28 mm. All five mounting holes and the central positioning groove are manufactured strictly according to OEM drawings, eliminating the need for additional modifications such as hole enlargement or grinding during installation-replacement can be completed simply by aligning the components.

The Kia Eurofles front brake disc (OE 5171239910) employs high-carbon gray cast iron as its base material, with a carbon content ranging from 3.3% to 3.6%. Compared to conventional cast iron, it exhibits superior thermal stability and is well-suited to the vehicle's gross weight and braking demands for this mid-to-large sedan. It minimizes thermal deformation and brake vibration under frequent braking conditions, meeting both daily commuting requirements and ensuring reliable braking performance during long-distance highway driving.

This product is the front brake disc for the Kia Opirus (original OE number 5171239910, also known as a brake rotor in the industry and a core friction component of automotive brakes), specifically designed as a dedicated front axle replacement part for the first-generation Kia Opirus model (marketed as Kia Amanti in North America). It precisely matches the original brake system specifications of 2004–2010 models equipped with 3.5L or 3.8L V6 engines. As a certified aftermarket replacement matching original specifications, this brake disc features a ventilated design with an initial diameter of 300 mm and thickness of 28 mm. All five mounting holes and center positioning slots are manufactured strictly according to original drawings, eliminating the need for additional modifications like hole enlargement or grinding during installation-simply aligning the parts completes the replacement. The OE 5171239910 brake disc uses high-carbon gray cast iron as its base material, with carbon content controlled between 3.3% and 3.6%, offering superior thermal stability compared to conventional cast iron. It effectively accommodates the vehicle's weight and braking demands, preventing thermal deformation and brake vibration even under frequent braking conditions. This makes it ideal for both daily commuting scenarios and ensuring reliable braking performance during long-distance highway drives.

1. Why do some brake discs rust completely after just two years, while others remain durable even under extreme conditions like Southeast Asia's rainy seasons, coastal high-salt environments, and northern snowmelt salt roads? The secret lies in a three-layer progressive anti-rust coating system: a zinc-based phosphating primer that enhances adhesion by 42%; an epoxy zinc-rich primer with a zinc content of ≥86.5%, which continues providing protection through sacrificial anodization even when damaged; and a UV topcoat capable of withstanding 500 hours of neutral salt spray exposure without exhibiting any red rust.
The original brake disc for the Kia Eurofles model (OE-5171239910) features three layers of rust prevention protection – not just one layer.

2. For the non-friction surface of a brake disc, we have implemented three protective layers: First, a phosphating layer (9–13 μm) that cleans the substrate and ensures proper primer adhesion, enhancing bond strength by 42%. Second, a zinc-rich primer with a zinc content ≥86.5%, providing rust protection even under peeling conditions. Third, a UV topcoat (21 ± 3 μm) achieving zero red rust in a 500-hour salt spray test. Kia Ophiles Front Brake Disc 5171239910 – specifically designed for various high-humidity, high-salt, and highly corrosive operating environments.

Compatible Vehicle Models

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

Cross Reference Part Number Table

All Kia Opel front brake discs (5171239910) are manufactured in our proprietary temperature-controlled CNC workshop located in Laizhou, Shandong Province. The workshop maintains a constant temperature of 22±2°C year-round, eliminating temperature fluctuations that could compromise machining accuracy from the outset. The floor is treated with epoxy dust-proof coating, and the machining area is equipped with an independent cutting fluid circulation filtration system to minimize the risk of impurities scratching the disc surface. The facility houses 16 Doosan horizontal CNC machining centers, each featuring automatic loading/unloading robotic arms, and strictly adheres to the "single-clamping-through-all-process" procedure-where disc surface machining, installation hole drilling/honing, and center stop processing are all completed within a single clamping cycle, completely avoiding cumulative dimensional tolerances caused by multiple clamping operations. The standard machining time per disc remains consistently 128 seconds, ensuring exceptional dimensional consistency and stability across products in the same batch.

The finished disc thickness variation (DTV) is consistently controlled at ≤0.008 mm, with lateral movement limited to ≤0.045 mm and surface roughness maintained at a stable level of Ra ≤ 1.4 μm. This high-precision disc design ensures uniform and tight contact between the brake pad and disc after installation, fundamentally preventing steering wheel vibration during high-speed braking.

The quality control process features five dedicated mandatory inspection checkpoints, comprehensively covering the entire workflow from raw materials to finished products.

All raw materials upon arrival at the factory undergo 100% spectral composition analysis to ensure that the high-carbon gray cast iron material composition strictly complies with formulation specifications; 2. After rough machining, metallographic examination is performed at a frequency of one sample every 20 pieces to verify graphite morphology and matrix strength; 3. Following finish machining, all products must pass fully automated dynamic balancing tests, with residual imbalance strictly controlled within 4.5 g·cm; 4. Upon completion of spray coating, three samples per batch are selected for coating adhesion grid testing, requiring Grade 0 performance before proceeding; 5. Before product release from storage, each item undergoes verification of installation hole dimensions and surface runout values.

All inspection data are synchronized into the factory's MES system. Each batch of brake discs (number 5171239910) can be fully traced back to its corresponding production team, equipment identifier, and complete set of inspection reports, ensuring full transparency and controllability throughout the quality management process.

6.Regular wholesale customers: Enjoy an 18-month/60,000-kilometer warranty with free product replacement for quality issues.
Standardized packaging protection: Each brake disc is fully wrapped in a thickened OPP pearl cotton bag, with circular cardboard pads installed on both sides of the friction surface; each set (containing two discs) is placed in a five-layer corrugated neutral paper box, with internal gaps filled and secured using foam strips, and paper corner guards added to all four corners; entire shipments are uniformly supported on standard fumigated wooden pallets reinforced with cross-shaped PET packing straps, with an outer layer of at least three layers of stretch film applied for moisture resistance and stack stability, thereby minimizing transportation impact risks.
We promise to respond to all quality objections within 12 working hours. Once the issue is verified, we will provide a replacement or refund plan within 24 hours. A dedicated specialist will follow up the whole process without evasion or delay.

Is this brake disc interchangeable with the front brake disc of the Kia Cadenza?

No, it is not interchangeable. The Kia Opirus front brake disc with OE number 5171239910 differs from the Cadenza in hub bore diameter and disc height. Forcing installation will cause uneven wear and brake shudder. Please order goods strictly according to the OE number.

Which model years and engine displacements of the Kia Opirus does this brake disc numbered 5171239910 specifically fit?
Answer: This front brake disc for the Kia Opirus is a precise fit for the front axle of the first-generation Kia Opirus (2004-2010) equipped with 3.5L and 3.8L V6 engines. It is also compatible with the corresponding model year versions of the Kia Amanti built on the same platform for the North American market. It replaces the original factory OE number 5171239910, with installation dimensions perfectly matching the original part at a 1:1 ratio without any fitting deviations.

Does the disc surface have slots for noise-damping shims?

No pre-machined slots are provided. However, the non-friction surface of this brake disc achieves a flatness of Ra1.6. Directly fitting factory noise-damping shims will eliminate abnormal noises. If you require a complete set with shims, please specify this separately when placing your order.

From the perspective of developments in the global auto parts braking industry in recent years, the dual standards of environmental compliance and performance upgrading have been continuously tightened: With the advancement of the Euro 7 emission regulations in the European Union, stricter limits have been imposed on particulate emissions and heavy metal content of braking components. Brake discs whose coatings contain excessive heavy metals such as lead and cadmium will be gradually banned from entering the EU market. The Middle East has intensified inspections on high-temperature resistance performance and quality certifications for imported auto parts, making customs clearance far more difficult for products without ECE certifications or equivalent credentials. Southeast Asian countries including Thailand and Indonesia have also implemented mandatory certification systems for braking components, barring uncertified products from regular shelf sales. Meanwhile, consumer demand in overseas aftermarkets has advanced. Owners of mid-to-high-end vehicles and repair shops prioritize braking stability and durability instead of merely seeking low-cost products.

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