Cardone 21-5416 Power Steering Pump

Cardone 21-5416 Power Steering Pump

Restore hydraulic steering performance with the Cardone 21-5416 remanufactured power steering pump. Built for the 2003-2005 Lincoln Aviator, this unit is remanufactured to meet or exceed original equipment performance and is tested for pressure, flow, valve operation, steering effort, and noise.

Cardone’s Power Steering Pump line focuses on OE-style fit and function with remanufactured components that are inspected, upgraded where needed, and verified before shipment. For Lincoln Aviator power steering pump replacement needs, this part number 21-5416 is a direct-fit solution for the listed application.

Key Features

• Fits 2003-2005 Lincoln Aviator, N/A
• Remanufactured Original Equipment-style power steering pump
• Hydraulic efficiency testing for pressure, bypass, and fluid flow
• Triple-tested critical components including cam packs and spool valves
• 100% new O-rings and premium HNBR seals to help reduce leaks
• Surfaced shafts to precise specifications to help reduce premature seal wear
• 100% tested and calibrated pressure relief valves
• Aluminum housing with O-ring hose port type
• Press-on pulley included; remote reservoir design

Detailed Description

The Cardone 21-5416 power steering pump is engineered for the 2003-2005 Lincoln Aviator and is built as a remanufactured OE replacement for dependable steering assist. Each unit is computer-tested after assembly to verify hydraulic performance, valve function, steering effort, and operating noise. The remanufacturing process also incorporates design review and upgrades where applicable to improve durability over the original design.

This pump uses a threaded outlet, hose barb inlet attachment, and a press-on pulley design. The package includes the hydraulic pump, instruction sheet, and sealing kit. For Lincoln Aviator owners searching for a remanufactured power steering pump 21-5416, this part is built to match the original application and restore consistent hydraulic assist.

This part cross-references Lincoln OE part number 2C5Z3A696AARM for the same application.

What It Helps Fix

• Hard steering at low engine speed
• Whining or noisy power steering pump operation
• Loss of hydraulic assist after pump wear or internal leakage
• Inconsistent steering effort caused by worn valves or seals
• Fluid leakage from aged pump seals or shaft wear

Installation Notes and Tips

For 2003-2005 Lincoln Aviator applications, the reservoir is not included and an in-line filter is required. OE fluid and a full system flush are required for warranty coverage. If the original pulley has a loose fit after removal, replace the pulley rather than reusing it. If steering assist is only present at higher engine rpm, inspect the steering system for restriction, contamination, or binding components before and after installation.

When replacing a power steering pump, flush the system to remove debris and follow the vehicle manufacturer’s fluid service recommendations. Contaminated fluid can shorten pump life and affect valve operation.

Quality Assurance

Cardone remanufactures this pump to OE performance standards and verifies critical components through multiple tests before release. The final assembly is hydraulically tested for pressure, bypass, flow, valve operation, steering effort, and noise to help ensure reliable operation in the Lincoln Aviator.