Air Suspension category referenceSpecial order · Estimated lead time: typically 2-4 weeks
09-16 Audi S4 - Airtech Executive Air Suspension
Choose year, make and model to confirm this application-specific product fits — you can add it to your cart either way.
Verify fitment- Four 36-way air struts, four vehicle-matched air bags and four ride-height sensors
- 5-gallon lightweight air tank with two 1/4 in and two 3/8 in ports, mounted on a black carpeted board
- One VIAIR 444C compressor, 165–200 psi pressure switch and two 30 A relays
- Four-corner electronic control unit, full-color OLED remote, vehicle charger and separate backup remote
- 25 m of 1/4 in air line, 1 m of 10 mm air line, power wire and the listed tank/control fittings
- Application-specific tool kit with spanner wrenches, damping knobs and brake-line brackets, plus the owner’s manual
One approved application: 2009–2016 Audi S4 · B8 · AWD
Choose an available option for each required item to enable Add to cart: Electronic Damping Option. Options marked “Contact for quote” require a KSport quote and cannot be added directly.
- Ships from Mesa, AZ
- 12-month limited warranty
- Special order: typically 2-4 weeks
Specifications — CAU261-AEX
Product details
Executive is the top-tier Airtech system for the 2009-2016 Audi S4 AWD. Four vehicle-matched air bags sit inside 36-way struts, and four ride-height sensors let the system level the car on its own, which is the job this tier is built for.
Control comes from a four-corner electronic unit and a full-color OLED remote that shows pressure at every corner. A backup 4-button remote is included, along with the vehicle charger for the OLED unit. The compressor is a single VIAIR 444C, paired with a 165-200 psi pressure switch and two 30 A relays.
Plumbing includes 25 m of 1/4 in air line, 1 m of 10 mm line and a 5-gallon lightweight tank with two 1/4 in and two 3/8 in ports. A tool kit with spanner wrenches, damping knobs and brake-line brackets is part of the package. Raise time depends on plumbing, pressure and installation, so judge it on your own car after the install.
Supported features
The OLED color-screen remote displays tank and bag pressure at all four corners and charges from the included vehicle charger. A standard 4-button backup remote is included.
36 levels of damping adjustment on every strut using the included damping knob.
Sleeve-type and double-bellow bags engineered to match the vehicle and its OEM suspension design.
Fine-tune ride height at any pressure through the adjustable lower mount.
One VIAIR 444C compressor, a 165–200 psi pressure switch and two 30 A relays are included. Raise time depends on the vehicle, plumbing, pressure and installation.
Available on certain MacPherson-strut applications.
Compatible applications (2)
Choices for this system
Basic (paddle valves and gauge), Deluxe (electronic switches and remote), Pro Plus (OLED remote, four-corner control) and Executive (adds height sensors and auto-leveling) are separate part numbers for this vehicle; compare them on the Air Suspension page.
Available on certain MacPherson-strut applications; ask a technician whether they apply to this vehicle.
The kit includes an OLED color-screen remote plus a standard 4-button backup remote.
Installation
Bolt-on struts with supplied hoses, wiring and manuals; professional installation is recommended. Recheck the system after the first 500 miles or one month; to check for leaks, inflate to 70 psi and spray each fitting with soapy water.
Air suspension setup and careWarranty & service
12-month limited warranty to the original purchaser against defects in materials and workmanship. Racing use, exterior finish and improperly installed or modified parts are not covered; keep your original invoice for any claim.
Warranty terms and service requestsOther published pages for MPN CAU261-AEX
These page names share this MPN; they do not confirm fitment. Verify your vehicle before ordering.