Bosch KS00000959 Rack and Pinion Assembly
OE Quality 60-Day Returns
Bosch
 Steering Rack, Hydraulic (New)

Bosch KS00000959 Rack and Pinion Assembly

Brand Bosch KS00000959
New Or Remanufactured New
Product line Steering Rack, Hydraulic (New)
Fits Audi · 4 vehicles

New hydraulic steering gear. Built as a rack and pinion assembly for precise steering response.

OE-style replacement. New unit for straightforward installation and dependable operation.

Bosch engineering. Backed by a trusted name in steering components.

Cross-references 4E1422052D for the same application. See all 1.

$1,721.41Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Order total $1,721.41
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Rack and Pinion Assembly options

Bosch Hydraulic Steering Rack for Audi

Bosch KS00000959 is a new hydraulic steering gear assembly for select Audi full-size performance and luxury models. It is built for direct replacement service on hydraulic power steering systems and is listed for 2007-2008 Audi S8 and 2009-2010 Audi A8 Quattro applications.

Key Features

  • Brand: Bosch
  • Brand line: Steering Rack, Hydraulic (New)
  • Part number: KS00000959
  • New hydraulic rack and pinion assembly
  • Manufacturer description: hydraulic steering gear (HPS)
  • Fits select Audi A8 Quattro and Audi S8 models
  • Cross-reference: 4E1422052D

Product Details

The Bosch steering rack, hydraulic (new), is part of Bosch’s steering rack product line for hydraulic steering service. This rack and pinion assembly is specified for vehicles that use hydraulic power steering, providing a direct-fit replacement option for the steering gear on 2009-2010 Audi A8 Quattro and 2007-2008 Audi S8. If you are searching for Bosch KS00000959, this hydraulic steering gear is the correct OE-style service part for those listed applications.

This part cross-references 4E1422052D for the same application.

Common Issues This Part Addresses

  • Steering play or looseness from a worn rack and pinion assembly
  • Hydraulic steering fluid leakage at the steering gear
  • Uneven or inconsistent steering response
  • Noisy steering operation caused by internal wear
  • Excessive effort when turning the wheel on hydraulic steering systems

Installation Notes and Tips

Verify the vehicle’s steering system and part number before installation. This Bosch KS00000959 steering rack is listed for 2009-2010 Audi A8 Quattro and 2007-2008 Audi S8, so confirm model year and hydraulic steering configuration against the original unit. After installation, perform a professional alignment and inspect the hydraulic system for proper fluid level and leaks.

Quality Assurance

Bosch is a recognized OE supplier in automotive systems, and this new hydraulic steering rack is manufactured for service replacement use in the listed Audi applications. Confirm fitment by VIN and original part number when ordering Bosch KS00000959.

Related reading

This part fits 4 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2010AudiA8 Quattro4.2LV8N/ASteering Rack, Hydraulic (New)
2009AudiA8 Quattro6.0LW12N/ASteering Rack, Hydraulic (New)
2008AudiS85.2LV10N/ASteering Rack, Hydraulic (New)
2007AudiS85.2LV10N/ASteering Rack, Hydraulic (New)
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
4E1422052D