Air Suspension Compressor Dryer — Land Rover Discovery 3 / 4 Hitachi | OEM VUB504700
Protect Your Hitachi Air Suspension Compressor — Replace the Dryer Before It Destroys the Valve Block.
The dryer on the Land Rover Discovery 3/4 Hitachi air suspension compressor absorbs moisture from the compressed air circuit. When it becomes saturated, moisture passes through to the valve block and air struts — causing internal corrosion, valve block seizure, and strut damage. Replacing the dryer is cheap preventive maintenance that protects far more expensive components.
Why Replace the Dryer
- Prevents Valve Block Damage: Moisture in the air circuit corrodes the valve block internals — a $300–$600+ component.
- Extends Strut Life: Dry air prevents corrosion inside the air struts.
- Cheap Insurance: Replace every 3–5 years or whenever rebuilding the compressor.
Vehicle Compatibility
Land Rover Discovery 3 (L319, 2004–2009), Land Rover Discovery 4 (L319, 2009–2016) — Hitachi compressor
OEM Reference
- VUB504700
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