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Lincoln Navigator Air Suspension Diagnostic Overview
by
flippancy
02 Aug 2026
The 2003-2006 Lincoln Navigator uses an air suspension system that can set diagnostic trouble codes such as C1724, C1725, C1726, and C1770. These codes typically relate to height sensor or compressor issues. Common causes include failed air struts, a worn compressor, leaking air lines, or faulty height sensors. Replacement parts, including aftermarket air struts and compressors, are widely available, but it is important to verify compatibility with the vehicle's model year and suspension configuration before installation.