Vehicle Fitment

  • 2015–2019 Lincoln MKC (2.0 L I4 Turbo, FWD or AWD)
  • 2014–2021 Nissan Rogue (2.5 L I4, FWD or AWD)
  • 2020–2021 Nissan Rogue Sport (2.0 L I4 Turbo, FWD or AWD)
  • 2018–2022 Volkswagen Atlas (2.0 L I4 Turbo or 3.6 L V6, FWD or AWD)
  • 2012–2019 Volkswagen Beetle Turbo (Turbo I4, FWD)
  • 2007–2010 Volkswagen Jetta (2.0 L I4, FWD; excludes TDI diesel)
  • 2007–2009 Volkswagen Passat Wagon (2.0 L I4 or Diesel, FWD)

Fitment Notes

  • Rear-axle only; fits vehicles with rear coil-spring suspension
  • Not compatible with air- or leaf-suspension systems
  • Excludes Jetta TDI diesel due to chassis differences

Features

  • Installs inside factory rear coil springs for variable spring rate
  • Adjustable air pressure (5–35 PSI) for load-leveling flexibility
  • Supports 500–1,000 lb per set (never exceed GVWR)
  • Improves ride comfort under load, reduces sag & bottoming
  • Enhances steering stability and braking performance
  • Maintains vehicle level and correct headlight aim
  • Durable polyurethane construction handles extreme temperatures
  • Quick, no-drill installation (1–2 hours)

Specifications

  • Material: Elastic polyurethane air springs
  • Load Capacity: up to 1,000 lb per pair
  • Air Pressure Range: 5–35 PSI
  • Operating Temperature Range: –40 °F to 180 °F
  • Mount Position: Rear coil springs
  • Installation Time: ~1–2 hours

Included Components

  • 2x Coil‑Rite Air Springs
  • 2x Support Cups
  • 1x Air Line Tubing
  • 2x Separate Inflation Valves
  • All Required Hardware and Instructions

Product Description

The Firestone 4175 Coil‑Rite Air Spring Helper Kit is engineered to enhance load handling and ride quality on select SUV and crossover models with rear coil-spring suspension. Designed to sit inside the factory coil springs, the system offers adjustable support to maintain level stance under heavy load, improving stability, braking, and tire wear.

Constructed from rugged polyurethane capable of withstanding –40 °F to 180 °F, this kit can handle extensive usage and harsh conditions. With a load capacity of up to 1,000 lb per set and a simple, mostly no-drill install process taking 1–2 hours, it’s an ideal solution for those seeking more confidence while towing or hauling.

Compatible with multiple Lincoln, Nissan, and Volkswagen platforms, the Firestone 4175 kit ensures consistent performance and comfort across various applications.



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