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Unity front air strut assembly kit, two silver struts side by side

Unity

Unity Front Air Strut Assembly Kit 113501 113502

SKU CH-WZ7Y-KKFTA

Kit of two electronic front air strut assemblies replaces faulty units on 2003-2006 Mercedes-Benz S430 and S500 models

  • Regain smooth ride comfort with two electronic air strut assemblies
  • Built to OE specifications for direct replacement fitment
  • Kit covers 2003-2006 Mercedes-Benz S430 and S500 models
  • Includes both part numbers 113501 and 113502 in one package
  • Backed by over 50 years of Unity suspension manufacturing experience

Front Air Strut Assembly Kit

This Unity kit provides two electronic air suspension strut assemblies built to original equipment specifications. It is designed as a direct replacement for faulty air strut assemblies on compatible Mercedes-Benz models. The components restore smooth ride quality and structural support for the vehicle and its load.

Mercedes-Benz S-Class owners 2003-2006

The kit fits 2003-2006 Mercedes-Benz S430 and S500 models requiring replacement of both front air strut assemblies. It is not intended for vehicles outside this model range or for owners needing rear suspension components. Buyers with different model years or chassis configurations should verify fitment before purchase.

Two electronic air strut assemblies

The bundle includes two complete front air strut assemblies, eliminating the need to source left and right units separately. This paired approach ensures matched damping characteristics and simplifies the installation process. The electronic units integrate with the vehicle's existing air suspension control system.

How it compares

Measured against everything we stock in Brake Service Tools & Presses, at today’s prices. Recalculated every night.

Price $544.99
Pricier than about 93% of the 1,702 comparable items (median $86.99).

Specifications

Product
Brand nameUNITY

Questions about this item

Will the 113501 113502 kit fit my 2003 Mercedes-Benz S430 without any other suspension parts?

Yes, the kit includes two electronic air strut assemblies built to OE specifications for 2003-2006 S430 and S500 models, so no additional struts are required.

Can I keep my existing air compressor and valve block when installing the 113501 113502 assemblies?

The new assemblies are designed as direct OE replacements, so they connect to the factory air lines and electrical plugs used by your current compressor and valve block.

How can I confirm the 113501 113502 struts are working correctly after installation?

Start the vehicle and watch the ride height settle to the normal level; the dashboard suspension warning light should stay off and the car should sit level at all four corners.

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