Delphi TBR4452 Rack and Pinion Bellows

Rack and Pinion Bellows for Mercedes-Benz Steering

Delphi TBR4452 is a rack and pinion bellows built for Mercedes-Benz steering systems that need a precise OE-style seal and protective boot. It is backed by Delphi’s aftermarket steering expertise and dimensional analysis for accurate part matching.

• OE-focused steering bellows for rack and pinion applications
• Engineered for broad temperature exposure from extreme cold to high heat
• Salt-spray tested for corrosion resistance validation
• Dimensional and material analysis supports OE-to-aftermarket compatibility

Detailed Product Overview

This rack and pinion bellows helps protect the steering rack area from dirt, moisture, and road debris while maintaining the correct sealed interface. Delphi applies OE safety technology and steering portfolio experience to this part number, TBR4452, with testing that includes temperatures below -40 degrees C, above 120 degrees C, and 720 hours of salt spray. It is a fitment-based replacement for Mercedes-Benz GL350, GL450, GL550, GL320, R350, R320, R500, R63 AMG, ML350, ML450, ML550, ML63 AMG, ML320, and ML500 applications across the listed model years.

This part cross-references Beck/Arnley 103-3082 for the same application.

What It Helps Address

• Damaged or cracked steering bellows
• Contamination entering the rack and pinion area
• Moisture exposure around steering components
• Fitment issues from worn OE-style protective boots

Installation Notes and Tips

Verify the vehicle year, model, and steering application against the listed fitment before installation. Confirm the replacement matches the original bellows shape and dimensions, especially on Mercedes-Benz GL-Class, ML-Class, and R-Class vehicles. Part number TBR4452 should be matched to the exact application shown in the fitment table.

Quality Assurance

Delphi states that its OE safety technology and aftermarket steering parts are validated through extreme temperature testing, salt-spray exposure, and dimensional/material analysis to support OE-level fitment consistency.