Discovery 4 Compressor and Valve Block Package

Compressor and Valve Block Package for the Discovery 4: compressor, valve block and relay replaced together, because they fail together.

Air suspension fails as a system rather than a part. A leaking air spring makes the compressor run longer, the compressor gets hot and wears, and the valve block ends up working against both. Replacing the part that failed last usually means paying for the next one within a year. These packages replace the parts that wear together, and the conversions are offered honestly: coil springs are cheaper to run, lose the height adjustment and the ride quality, and need declaring to your insurer. The Discovery 4 is the Discovery 3 made better, but the 3.0 V6 diesel carries a crankshaft failure risk that every owner ought to know about.

Specification and fitment

• Fits: Discovery 4, chassis code L319
• Engine: 3.0 TDV6 and SDV6 diesel, 5.0 V8
• Production dates: 2009 to 2016
• Quality: Parts Only or Parts and Fitting
• Part number: cross referenced to the factory part number for your VIN and confirmed before dispatch, because supersessions on these vehicles are frequent and one printed number would be wrong for somebody
• The failure this addresses: a compressor that runs hot and a valve block that leaks back
• Labour time: about 3 hours
• Coding: a calibration or adaptation routine is required afterwards with a dealer level diagnostic system; a generic code reader cannot do it
• Also needed: a leak test on the springs
• Torque: 8 Nm
• Weight: about 12 kg
• Warranty: two years or 24,000 miles, whichever comes first

What arrives

• Compressor
• Valve block
• Relay
• Filter

Fitting

Labour guide: about 3 hours. Land Rover changes specification mid production, often by VIN rather than by model year, so send the VIN or the registration with the order and we confirm the part against the build data before anything leaves. It takes two minutes and it is the difference between a part that fits and a return. We are an independent Land Rover specialist and parts supplier. We are not Land Rover or Jaguar Land Rover and are not appointed by them; the model names are their trademarks and are used here to describe fitment. Everything we sell is chosen for vehicles that actually get used: towed with, loaded, driven through water and parked in fields, rather than for the brochure.

Which version to buy

Parts Only is the parts delivered to you or your garage, with our fitting notes. Parts and Fitting is the parts fitted at our workshop, road tested and with the warranty covering labour as well as parts.