Replacement Chassis Air Suspension Height Level & Axle Load Sensor 504002113 481829 for Volvo, Scania, MAN Trucks

Product Overview The 504002113 / 481829 / 1138883 High-Precision Chassis Air Suspension Ride Height & Axle Load Sensor is a commercial-grade fleet management component engineered as a premium direct aftermarket replacement for Volvo, Scania, and MAN heavy-duty commercial trucks, highway logistics haulers, and regional vocational chassis. Positioned securely on the truck frame rails and linked directly to the front or rear suspension control arms, this heavy-duty rotary displacement sensor continuously monitors millimetric changes in distance between the axle and the chassis. It instantly translates continuous mechanical height variables into clean, noise-free low-voltage telemetry frequency streams for the central Electronically Controlled Air Suspension (ECAS) system computer. Maintaining precise positioning through this sensor is critical for real-time automatic leveling, ensuring even headlight aiming alignments, balancing dynamic axle payload distribution, and preventing unexpected road handling variances or electronic suspension limp modes. Technical Specifications Primary Manufacturer Interchangeable Codes: Knorr-Bremse / Wabco 0504002113, 0504002111, 0504002010 (Associated base systems) Volvo Truck OE Reference Numbers: 504002113, 504002111, 50400210600 Scania Truck Cross References: 1138883, 481829 MAN Truck Factory Reference Number: 50.35299.84, 503529984 Renault / Iveco Cross References: 5010207803 Component Type: Heavy-Duty Commercial Vehicle Multi-Brand ECAS Air Suspension Chassis Ride Height Level & Axle Load Displacement Transducer Unit Sensing Element Architecture: High-resilience internal non-contact inductive rotary element calibrated to completely eliminate electronic resistance tracking drift, internal friction wear, and signaling lag under continuous road shocks Material Engineering: Anti-corrosive reinforced polymer body housing mated with heavy-duty metal linkages and high-conductivity terminal pins designed to withstand high mud, grease, and moisture exposure Condition: 100% Brand New Premium Aftermarket Replacement Vehicle Fleet, Chassis Generation & ECAS System Compatibility This premium European commercial transport height monitor features extensive cross-reference application configurations across multi-ton heavy truck chassis layouts, long-haul freight distribution networks, and multi-brand electronic suspension frameworks: Truck Fleet Chassis & Model Family System Application & Operational Fleet Fitment Volvo Trucks Commercial Line (FH, FH12, FM, FM12, FMX Logistics Fleets) Chassis ride height tracking loops, dynamic trailer leveling diagnostics, and automatic electronic axle load calculation logs matching front or rear pneumatic configurations. Scania Heavy Duty Truck Series (Scania 4-Series: 94, 114, 124, 144, 164 Cargo Platforms) Primary pneumatic valve block control logging, main axle weight monitoring, and chassis pitch stability sync arrays across line-haul freight networks. MAN Commercial Truck Networks (TGA, TGS, TGX Heavy Logistics Lines) ECAS underbody framework height leveling arrays, pneumatic dump valve synchronization, and auxiliary lift axle logging parameters under intensive payload distributions. Performance Benefits Fix Uneven Ride Heights, Rough Pneumatic Behavior & Suspension Code Errors: Directly replaces cracked, moisture-shorted, or linkage-bound legacy sensors that feed incorrect angle data to the ECAS computer, avoiding tilted frame rails, erratic air bag pressure fluctuations, and unneeded dashboard fault codes. Advanced Multi-Axis Harmonic Vibration Buffering: Ruggedized solid-state internal components are structurally hardened and fully insulated to survive intensive continuous chassis frame twisting and axle housing road shocks during long-haul freight operations. Superior Mud, Water & Road Salt Chemical Resilience: Sealed premium composite housing completely resists heavy chassis grease buildup, under-vehicle water sprays, winter road salt crusting, and continuous exposure to maintenance cleaning degreasers. IP67 Rated Waterproof Interface Socket Execution: Premium molded connection collar incorporates high-grade internal sealing blocks to completely shield low-voltage electronic signal paths against under-body road splash environments and high-pressure maintenance washdowns. Maintenance Tip: When installing the replacement 504002113 / 481829 height level sensor, ensure the truck is parked securely on level ground, the wheels are safely chocked, and the air suspension system is fully supported with safety jacks or chassis blocks to avoid sudden physical frame drops during hardware replacement. Disconnect the truck battery master switch before handling the electrical lines. Thoroughly clean the surrounding frame brackets and tracking rod connectors of any road grime, dried mud, or oxidation scale. Mount the new sensor cleanly to its position, ensuring the mechanical linkage arm matches original geometry tracking angles perfectly. Firmly snap the wiring harness connector back into place, clear legacy trouble codes with an OBD scanner, cycle the ignition, and perform an ECAS recalibration sequence via your workshop diagnostic tool if required to guarantee perfect system alignment.