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Black cylindrical rear air spring with metal end caps, Unity branding visible

Unity

Unity Rear Air Spring 15-540000

SKU CH-4M96-EVPPW

Rear air spring replaces worn suspension components on 1992-2011 Crown Victoria, 1990-2011 Town Car and Grand Marquis

  • Restores air suspension for safe, comfortable ride
  • 50 years manufacturing expertise ensures reliable quality
  • Direct-fit for 1992-2011 Crown Victoria models
  • Compatible with 1990-2011 Lincoln Town Car
  • Fits 1990-2011 Mercury Grand Marquis applications

Rear Air Spring for Crown Victoria & Town Car

The Unity rear air spring replaces worn suspension components on 1992 to 2011 Ford Crown Victoria, 1990 to 2011 Lincoln Town Car, and 1990 to 2011 Mercury Grand Marquis models. It restores the factory air-ride system so the vehicle maintains proper ride height and load-carrying capacity. The part is designed for a direct fit without modification.

Sustained load behaviour

Under continuous weight the spring maintains consistent pressure to keep the rear axle level over long distances. The rubber-and-fabric construction resists fatigue from repeated compression cycles during daily driving. It delivers stable handling whether the vehicle is lightly loaded or carrying maximum passengers and luggage.

Air suspension system limits

The spring operates within the original equipment air-pressure range and relies on the vehicle's existing compressor and valve block. It cannot compensate for leaks elsewhere in the air lines or a failing compressor. Vehicles converted to coil springs or equipped with aftermarket lift kits are not compatible with this replacement unit.

Highlights

  • Restores air suspension for safe, comfortable ride
  • 50 years manufacturing expertise ensures reliable quality
  • Direct-fit for 1992-2011 Crown Victoria models
  • Compatible with 1990-2011 Lincoln Town Car
  • Fits 1990-2011 Mercury Grand Marquis applications

Specifications

BrandUNITY

Questions about this item

How much heat does the 15-540000 rear air spring generate during continuous daily driving?

The air spring operates passively using compressed air and contains no electrical components, so it produces no measurable heat during extended use.

What existing suspension components must be present on the vehicle for the 15-540000 to install and function correctly?

The unit replaces the factory rear air spring directly and requires the original air lines, compressor, height sensors and mounting brackets to be intact and operational.

Will the 15-540000 integrate with the factory air suspension controls on a 2011 Mercury Grand Marquis?

Yes, the spring is designed as a direct replacement for the original equipment on 1990-2011 Lincoln Town Car and Mercury Grand Marquis models, matching the factory mounting points and air fitting.

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