TRW Automotive AfterMarket DB4339 Brake Drum

TRW Automotive AfterMarket DB4339 Brake Drum

The TRW DB4339 Brake Drum is a high‑performance braking component designed for rear drum brake systems on a wide range of Toyota models, including the Yaris, Vitz, and ECHO series. Manufactured by TRW Automotive, this part delivers reliable stopping power while maintaining durability under demanding driving conditions.

Key Features

• OEM Quality: Designed to meet or exceed original equipment specifications for Toyota vehicles.
• Precision Machining: Each drum is machined to exact tolerances, ensuring optimal fit and balance.
• High‑Heat Resistance: Constructed from a specially formulated steel alloy that withstands high temperatures without warping or losing structural integrity.
• Corrosion Protection: Surface treatment provides long‑lasting resistance to rust and corrosion, extending the life of the brake system.
• Easy Installation: Standard dimensions allow for straightforward replacement with minimal tool requirements.

Compatibility Overview

The DB4339 is engineered for rear drum brakes on the following Toyota models and engine configurations:

• Yaris (P1) – 2003‑2005, 1L, 1.4L, 1.3L engines
• ECHO – 2SZ‑FE, 1ND‑TV, 1SZ‑FE, 1.0L 4‑cyl engines
• Vitz/ECHO – 2003‑2005 models with similar engine families
• Yaris I – 2003‑2005, 1L, 1.4L, 1.3L variants
• All rear drum brake configurations requiring a 200 mm diameter drum (Ø100 mm)

These specifications cover both left and right rear positions, ensuring full compatibility across the entire vehicle lineup.

Technical Specifications

Installation Guide

1. Secure the vehicle on a jack stand and remove the rear wheel.
2. Detach the brake caliper or shoe assembly by loosening the mounting bolts.
3. Remove the old drum by sliding it off the hub. If stuck, gently tap with a rubber mallet.
4. Inspect the hub for damage; replace if necessary.
5. Place the new DB4339 drum onto the hub, ensuring proper alignment.
6. Reinstall the brake shoe or caliper assembly and tighten all fasteners to manufacturer torque specifications.
7. Repeat on the opposite side.
8. Test the braking system by applying pressure to the pedal before driving.

Performance Benefits

• Consistent Stopping Power: The drum’s uniform thickness and material composition provide reliable brake response across a range of temperatures.
• Reduced Fade: Heat‑treated steel resists thermal degradation, minimizing fade during prolonged braking.
• Longevity: Corrosion protection extends service life even in harsh climates or road salt exposure.
• Balanced Rotation: Precision machining ensures minimal vibration and smooth operation at high speeds.

Maintenance Tips

• Regularly inspect brake shoes for wear; replace when the shoe material is less than 2 mm thick.
• Keep the drum surface clean to prevent uneven wear or scoring.
• Check wheel bearings and hub alignment periodically to avoid premature drum damage.
• Use a brake cleaner before reassembly to remove oil or grease residues.

Why Choose TRW DB4339?

The TRW Automotive AfterMarket DB4339 Brake Drum combines proven engineering with modern manufacturing techniques. Its design aligns closely with Toyota’s original specifications, ensuring that drivers receive the same level of safety and performance they expect from their vehicle. Whether you’re performing a routine replacement or upgrading for enhanced durability, this drum offers a dependable solution for rear braking systems.

Conclusion

For owners of Toyota Yaris, Vitz, and ECHO models seeking reliable rear brake performance, the TRW DB4339 Brake Drum stands out as a top choice. Its OEM‑grade construction, heat resistance, and corrosion protection make it an excellent investment in vehicle safety and longevity.