1990-1997 Land Rover Defender 90 - "Coil-Rite" Air Bag Helper Springs (Rear)

Land Rover Defender 90 Air Bags 1990-1997 by Firestone #4121
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Firestone - 4121-landrover-defender90-coil-rite
Authorized Dealer
Firestone #4121
Firestone - 4121-landrover-defender90-coil-rite
Authorized Dealer
Sale Price:
  • $123.38
$132.67 Save: $9.29 (7%)
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Usually Ships within 5 to 10 Days (excluding Saturday and Sunday)
Arrives 1 to 5 days after product ships


Firestone "Coil-Rite" air bag helper springs are designed to fit inside the existing coil spring suspension creating a variable rate spring. These air bags are made of durable, elastic polyurethane providing years of comfort and stability to your vehicle. "Coil-Rite" air bags enable adjustment for varying loads and road conditions by inflating or deflating the springs. Performance can be altered as easily as inflating a tire. Installed between the frame of the vehicle and the suspension providing load support through the use of air pressure.

Features and Benefits

  • Firestone Air Bags are custom fit for the Land Rover Defender 90
  • Easy installation (1 to 2 hours)
  • Includes (2) air bag helper springs and any required hardware
  • Will handle loads capacities up to 500-1000 lbs*
  • Reduce suspension fatigue
  • Improve steering and balance
  • Increase vehicle stability
  • Prevent "bottom" out
  • Firestone Limited Lifetime Warranty

Installation Notes

1. Do NOT exceed the vehicles Recommended Gross Vehicle Weight Rating (GVWR)

Tech Specs

Download Instructions 4121 Instructions
Level Load Capacity: 500 lbs to 1000 lbs
Average Install Time: 1 to 2 hours
Front or Rear Axle: Rear
Drilling Required (Yes or No): No
Weight: 10 lbs.
Part 4121 fits:
  • 1997 Land Rover Defender 90
  • 1996 Land Rover Defender 90
  • 1995 Land Rover Defender 90
  • 1994 Land Rover Defender 90
  • 1993 Land Rover Defender 90
  • 1992 Land Rover Defender 90
  • 1991 Land Rover Defender 90
  • 1990 Land Rover Defender 90

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