Delphi TBR4373 Rack and Pinion Bellows

Delphi Rack and Pinion Bellows for Range Rover Sport

Delphi TBR4373 is a rack and pinion bellows for steering systems on select Land Rover Range Rover Sport models. It is built for 2006-2013 Range Rover Sport applications and reflects Delphi’s OE-focused steering expertise for aftermarket replacement needs.

Key Features

• Fits 2006-2013 Land Rover Range Rover Sport, N/A
• OE-style steering bellows for rack and pinion protection
• Engineered using dimensional and material analysis for OE and aftermarket compatibility
• Tested for temperature extremes below -40 C and above 120 C
• Exposed to 720 hours of salt spray during validation
• Part number: TBR4373

Product Details

Delphi TBR4373 is a rack and pinion bellows used to protect the steering rack area from dirt, moisture, and road contamination while supporting proper steering system operation. Delphi applies OE-level design and validation methods to its steering portfolio, including material checks and dimensional analysis to help match original equipment requirements on the Land Rover Range Rover Sport. This part cross-references Monroe Shocks & Struts (e.g., 172286) for the same application.

Common Issues It May Address

• Cracked or torn steering rack bellows
• Contamination entering the steering rack area
• Moisture exposure around the rack and pinion assembly
• Wear-related deterioration on a Range Rover Sport steering boot
• Need for a direct replacement during steering service

Installation Notes and Tips

Verify the vehicle year and steering configuration before ordering. Inspect the rack, tie rod ends, and adjacent seals for wear before installation. Confirm the original bellows shape and dimensions against the removed part to ensure proper fit on the 2006-2013 Land Rover Range Rover Sport.

Quality Assurance

Delphi validates steering components through extreme-temperature testing and extended salt-spray exposure to support OE-level durability expectations in aftermarket service.