Rear Air Suspension Spring for 2013-2018 Ram 1500 & More - Arnott A-4008

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$449.99
MPN: A-4008
Item Package Code: EA
Part Has Core (Y/N): N
Item Package Quantity: 1
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Arnott Industries Air Suspension Spring P/N:A-4008
Arnott Industries Air Suspension Spring P/N:A-4008
$449.99

Smooth out a sagging rear ride and restore proper air suspension height with the Arnott Industries Air Suspension Spring A-4008 (also written A4008). This rear air spring assembly drops in as a direct-fit replacement for the 2013-2018 RAM 1500 — see the Buyer's Guide tab for engine-level fitment. As a rear air spring, it supports the vehicle on a column of compressed air and helps maintain ride height and cushioning at the rear axle; a leaking or cracked original air spring can cause the rear to sag, ride harshly, or trigger a suspension warning, and if a failed air spring is the cause, this replaces it.

  • Developed and tested: designed at Arnott's R&D center with laboratory stress testing and real-world road evaluation.
  • Built to endure: engineered for strength and durability to withstand demanding road conditions.
  • Quality standards: produced with strict adherence to ISO quality standards across Arnott's USA and EU facilities.
  • Replace in pairs: for best results, Arnott recommends replacing the rear air springs as a pair for balanced ride height.

Interchange: 4877136AA · 4877136AB

This part cross-references / interchanges with the following part numbers:

4877136AA, 4877136AB

Frequently Asked Questions

What vehicle does the A-4008 air spring fit?

It's a direct-fit rear air suspension spring for the 2013-2018 RAM 1500. Check the Buyer's Guide tab to confirm the exact engine and configuration for your truck.

Is this a front or rear air spring?

It is a rear air suspension spring assembly, mounting at the rear of the vehicle to support ride height and cushioning at the rear axle.

What does an air suspension spring do?

It supports the vehicle on a column of compressed air, helping maintain ride height and absorb road impacts. A leaking or damaged unit can cause sagging or a harsh rear ride.

Should I replace both air springs at once?

Arnott recommends replacing the rear air springs in pairs for best results, which helps keep ride height balanced from side to side.

What numbers does the A-4008 interchange with?

It cross-references 4877136AA and 4877136AB. Match your original part number to confirm the correct replacement for your RAM 1500.