TRW Automotive AfterMarket DF4903S Brake Disc

TRW Automotive AfterMarket DF4903S Brake Disc

The TRW DF4903S is a high‑performance rear brake disc designed for the Hyundai Terracan and similar models. Manufactured by TRW, a leader in automotive safety components, this disc delivers reliable stopping power while withstanding the demanding conditions of off‑road and heavy‑load driving.

Key Features

• Ventilated Design: The disc incorporates multiple ventilation channels that efficiently dissipate heat during braking, reducing brake fade and maintaining consistent performance.
• Durable Construction: Made from premium cast iron with a hardened surface, the DF4903S resists wear and corrosion, extending service life even under harsh environments.
• Optimized Geometry: The disc’s thickness (20 mm) and diameter (315 mm) are engineered to match the hydraulic and mechanical specifications of the Hyundai Terracan’s braking system, ensuring a seamless fit.
• Lightweight Profile: Despite its robust build, the disc maintains a low mass, which helps reduce unsprung weight and improves vehicle handling dynamics.
• Compatibility: Designed for rear application on models such as the Hyundai Terracan HP (2.5 L, 2.9 CRDi, 3.5 i V6) across various drivetrain configurations (4WD, 4x4).

Technical Specifications

Benefits of Choosing the DF4903S

1. Enhanced Safety: The ventilated design ensures consistent braking performance, reducing stopping distances and improving overall vehicle safety.
2. Longevity: High‑grade materials and precise manufacturing tolerances mean the disc can endure repeated high‑temperature cycles without significant wear.
3. Performance Consistency: The disc’s geometry aligns with the original braking system, guaranteeing that brake feel and responsiveness remain unchanged after replacement.
4. Ease of Installation: Standard mounting hardware and clear fitment guidelines allow mechanics to install the discs quickly without extensive modifications.

Installation Overview

Installing the TRW DF4903S involves removing the existing rear brake disc, cleaning the hub surface, and securing the new disc with the supplied mounting hardware. Key steps include:

1. Remove wheel and brake caliper.
2. Detach the old disc using a suitable wrench or impact driver.
3. Inspect the hub for damage; clean thoroughly.
4. Place the new DF4903S onto the hub, ensuring proper alignment.
5. Screw the mounting bolts to the specified torque (consult manufacturer’s torque chart).
6. Reinstall the brake caliper and wheel, then perform a brake fluid bleed if necessary.

Maintenance Tips

• Regularly inspect brake pads for wear; replace when pad thickness falls below manufacturer’s minimum.
• Check disc surface for scoring or glazing; polish lightly with a fine abrasive if minor imperfections exist.
• Keep the braking system clean from road salts and debris to prevent corrosion.
• Perform brake fluid checks every 12 months, replacing fluid as recommended by the vehicle manufacturer.

Why TRW?

TRW has a long-standing reputation for producing reliable braking components that meet stringent safety standards. The DF4903S reflects this commitment through:

• Rigorous quality control during manufacturing.
• Use of advanced materials engineered for high thermal conductivity.
• Extensive testing under simulated real‑world conditions.

Conclusion

The TRW DF4903S Brake Disc is an exemplary choice for owners and mechanics seeking a durable, high‑performance rear brake disc that aligns perfectly with the Hyundai Terracan’s braking architecture. Its ventilated design, robust construction, and precise fitment ensure reliable stopping power while extending component life. Whether you’re maintaining a fleet or upgrading a single vehicle, this disc delivers safety, performance, and peace of mind.