# VIAIR VIAIR Onboard Air Hookup Kit Canonical page: https://configmyrig.com/products/viair-onboard-air-hookup-kit Onboard-air gauge, switch/relay and hookup parts; 85/105 PSI control setting. Compressor and tank not included. ## Selected configuration - Part/component: 20053 - Configuration: 85 PSI ON / 105 PSI OFF - Listed parts: $146.75 USD / selected configuration - Source checked: November 2, 2026 - Fitment: Universal custom air-system controls, not a vehicle-specific bolt-on LC250 kit. Conditional for US-market 2024+ Land Cruiser 1958 / Land Cruiser / 2024 First Edition after installer confirmation of low-voltage circuit, routing and system compatibility. No connection to the hybrid high-voltage system. - Product mass: Product weight unverified - Net vehicle addition: Net addition unverified - Weight basis: Complete assembly gross mass and net installed vehicle addition are unverified. Commerce/shipping weights are not used as installed mass. Include fasteners, added equipment and any removed factory parts when calculating loads. - Professional install: 1–2 hr; researched planning estimate - Basis: Researched professional allowance using Quadratec’s published 1–2 hour SKU 20053 installation expectation and VIAIR’s gauge, airline, pressure switch, wiring and leak-check procedure. 20055 shares this procedure. Manufacturer hours are not published. - Contents: One illuminated dash gauge with on/off switch, one pressure switch with built-in relay, 20 ft air line, fused positive lead, listed NPT/compression/quick-connect fittings, terminals and mounting hardware. No compressor, tank or LC250 mounting bracket. - Critical specifications: SKU 20053: 85 PSI cut-in / 105 PSI cut-out; manual specifies 30A compressor maximum; dash gauge rated to 150 PSI. 20 ft air line and 20 ft positive extension lead; 1/8-inch OD compression airline fittings. - Supporting work: This kit switches a compatible compressor to maintain tank pressure. It does not supply compressed air by itself, and tank switch settings are not the desired tire-inflation pressure. ## Prerequisites - Selected product / listed contents (included): One illuminated dash gauge with on/off switch, one pressure switch with built-in relay, 20 ft air line, fused positive lead, listed NPT/compression/quick-connect fittings, terminals and mounting hardware. No compressor, tank or LC250 mounting bracket. - Compatible compressor (check): Confirm compressor current does not exceed the manual’s 30A limit, and compressor/tank/lines/gauge/safety devices tolerate the 105 PSI cut-out. Complete air systems may already include controls; do not buy duplicate hardware. - Separate compatible air tank (check): A separately mounted, rated air tank is required; none is included. Verify matching ports, pressure relief, check valve, drain and supported mounting. No catalog compressor selection proves that a tank is supplied. - Match pressure, current and safety hardware (check): Choose 85/105 PSI for the complete system, not tire pressure. Verify pressure relief, check valve and drain provisions with compressor/tank instructions, circuit protection, conductor size, relay and voltage compatibility. A supplied larger fuse does not raise the 30A compressor limit. - Protected air-line and electrical routing (check): Manual calls for drilled gauge mounting holes and potentially a protected firewall pass-through. Keep airline clear of heat and abrasion; verify occupied cabin, airbags and wiper/visibility clearances. Quote compressor/tank mounting separately. - Complete installed mass (quote): Obtain the kit’s assembly mass and add compressor, tank, brackets, fittings and wiring to the load budget. Shipping mass is not installed mass. - Installation / compatibility notes (check): This kit switches a compatible compressor to maintain tank pressure. It does not supply compressed air by itself, and tank switch settings are not the desired tire-inflation pressure. - Installed net weight (check): Product weight or factory equipment removed is not fully verified. Do not use shipping weight or assume zero additional load. ## Seller offers (selected configuration, low to high) - [VIAIR](https://viaircorp.com/products/onboard-air-hookup-kit?variant=43790067564705): $146.75 Prices are dated snapshots; tax, shipping, installation and unlisted supporting equipment are extra. Availability is not inferred. ## Installation resources - [VIAIR 20053 / 20055 hookup kit installation guide](https://viaircorp.com/cdn/shop/files/User_Manual_20052_53_55_Manual.pdf?v=9572315082594592248): official; Exact listed SKUs; vehicle-specific custom mounting scope as noted. Exact 20053/20055 manual procedure. 20052 is withheld because current product option says 145 PSI off while the PDF says 150 PSI off; do not substitute pressure settings. ## All documented options - [85 PSI ON / 105 PSI OFF](https://configmyrig.com/products/viair-onboard-air-hookup-kit?variant=acc-viair-hookup-20053): 20053; $146.75 USD / selected configuration; Product weight unverified - [90 PSI ON / 120 PSI OFF](https://configmyrig.com/products/viair-onboard-air-hookup-kit?variant=acc-viair-hookup-20055): 20055; $146.75 USD / selected configuration; Product weight unverified ## Owner evidence No sufficiently matched report added. No review rating is inferred. ## Related guidance - [Planning guide](https://configmyrig.com/guides/electrical-system-planning) - [VIAIR](https://configmyrig.com/brands/viair) - [Onboard air](https://configmyrig.com/categories/onboard-air) AI-assisted planning; exact vehicle/application and current supplier documentation require confirmation.