Arnott AS-3405 Air Suspension Strut - Front Left

Arnott AS-3405 Rear Left Air Strut

The Arnott AS-3405 is a new rear left air suspension strut for select AWD BMW 7-Series applications. It replaces the OE strut with a custom-tuned shock absorber and air spring assembly built for consistent ride control and responsive handling.

Compatible with 2016-2022 BMW 7-Series AWD models, including the BMW 750i xDrive and BMW 750Li xDrive, this air strut is assembled in the USA with service-focused components for long-term durability.

Key Features

• New, not remanufactured air suspension strut
• Rear left position for AWD BMW 7-Series applications
• Custom-tuned shock absorber for balanced ride quality
• Air adjustable design with air ride suspension support
• Progressive spring rate for controlled response
• Gas charged with hydraulic internal damper type
• Includes boot, bearing plate, spring isolators, upper mounting isolator, and mounting hardware
• Built with long-lasting seals, O-rings, bump stop, heavy-duty crimping rings, new air fitting, connector valve, and dust boot

Product Details

Arnott New line products focus on direct-fit suspension replacement parts engineered for modern air ride systems. The AS-3405 follows that approach with a complete rear left air strut assembly for the BMW 7-Series platform, including the 2016-2022 BMW 750i xDrive and 2017-2022 BMW 750Li xDrive. It is also listed for other AWD 7-Series and Gran Turismo applications in the same fitment range. This part cross-references OE numbers 37106866705 and 37107915965 for the same application.

Part number AS-3405 is designed to replace the original rear left strut while maintaining the vehicle’s air suspension function and ride characteristics. The assembly uses a black protective boot and a progressive spring rate to help maintain stable suspension behavior under changing load conditions.

What It Helps Address

• Rear suspension sag or uneven ride height
• Air leaks from worn strut seals or bladder components
• Excessive bouncing or reduced damping control
• Noise from deteriorated suspension isolators or bump stop wear
• Ride quality loss in air suspension BMW 7-Series AWD models

Installation Notes

Install AS-3405 at the rear left position only. Verify vehicle fitment by year, model, drivetrain, and suspension configuration before installation. Inspect the air line, connector valve, and mounting points for wear or contamination during replacement. Proper system depressurization and calibration procedures should be followed after installation on air suspension vehicles.

Quality Assurance

Arnott manufactures this new air strut in the USA using new components rather than remanufactured parts. The assembly is built with long-lasting seals, heavy-duty crimping rings, and protective hardware intended to support reliable operation in air suspension service.

• Fits 2017-2022 BMW 740i xDrive, front left
• Fits 2020-2022 BMW 745e xDrive, front left
• Fits 2020-2022 BMW 745Le xDrive, front left
• Fits 2016-2022 BMW 750i xDrive, front left
• Fits 2017-2022 BMW 750Li xDrive, front left
• Fits 2018-2019 BMW 640i xDrive Gran Turismo, front left