Atlantic Automotive Enterprises 3999N Rack and Pinion Assembly

Hydraulic Rack and Pinion for Porsche Steering

Atlantic Automotive Enterprises 3999N is a new hydraulic power steering rack and pinion complete unit built with OE-quality components. It is a standard replacement for Porsche steering systems that need precise response and dependable road feel.

Compatible With 1999-2005 Porsche 911 and 1997-2004 Porsche Boxster, this rack and pinion assembly is inspected and tested in the USA for proper operation and fitment. The 3999N is supplied with inner tie rods and does not include outer tie rod ends.

New Rack and Pinion Complete Unit

The Atlantic Automotive Enterprises New Rack and Pinion Complete Unit line focuses on direct-fit steering replacement parts for import and domestic vehicles. For Porsche 911 and Porsche Boxster applications, this hydraulic unit supports accurate steering input and consistent hydraulic assist while matching OE-style service expectations.

• Hydraulic rack and pinion assembly
• Standard replacement grade
• Inner tie rods included
• Outer tie rods not included
• Mounting hardware not included
• Inspected and tested in the USA

Detailed Product Overview

Part number 3999N is a complete hydraulic steering rack assembly for Porsche 911 and Porsche Boxster models listed in the fitment data. It is engineered as a replacement for worn or leaking steering gear components and is built to OE-quality standards for fit and function. If you are searching for a Porsche 911 rack and pinion replacement or a Porsche Boxster hydraulic steering rack, 3999N matches the confirmed applications below. This part cross-references Porsche OE numbers 99634701104 and 99634701105 for the same application.

Common Steering Issues This Part Addresses

• Steering fluid leakage from the rack assembly
• Excessive steering play or loose steering feel
• Uneven or inconsistent steering response
• Internal wear in the hydraulic rack and pinion unit
• Noisy steering operation caused by worn steering gear components

Installation Notes and Fitment Tips

Fits 1999-2005 Porsche 911, N/A; New, w/o Outer Tie Rod Ends; New Rack and Pinion Complete Unit.

Fits 1997-2004 Porsche Boxster, N/A; New, w/o Outer Tie Rod Ends; New Rack and Pinion Complete Unit.

Confirm hydraulic line routing, steering alignment, and tie rod condition before installation. Because outer tie rod ends are not included, inspect related steering components and replace any worn parts during service. After installation, perform a professional wheel alignment and verify steering wheel center.

Quality Assurance

AAE manufactures this rack and pinion with OE-quality components and subjects each unit to thorough inspection and testing in the USA to verify proper operation and fitment.