1685400117 Front ABS Wheel Speed Sensor Compatible with Mercedes A-Class W168 Vaneo 1997-2005

Mercedes-Benz W168 A-Class and Vaneo Front Sensor — The Original Premium Compact: The W168 A-Class (1997-2005) was Mercedes radical first attempt at a compact car, featuring a unique sandwich-floor construction with the engine mounted partly under the passenger compartment. The 1685400117 front sensor is specific to this front-wheel-drive platform and its extended derivative, the Vaneo compact MPV (2002-2005). Not compatible with the second-generation W169 A-Class.

Critical for the W168 Famous Elk Test ESP: The W168 A-Class infamously rolled during the Swedish Elk Test in 1997, leading Mercedes to make ESP standard equipment on all W168 models from 1998 onward — the first car in its class with standard stability control. The ESP system aggressive calibration relies on absolutely clean front wheel speed signals to detect the onset of the rollover-prone oversteer that the short-wheelbase, tall-body W168 is susceptible to.

Compact 460mm Harness for the Sandwich-Floor Engine Bay: The W168 sandwich-floor construction places the engine at a 59-degree angle beneath the passenger footwell, creating an extremely compact and unusually shaped engine bay. The 460mm front sensor harness is one of the shortest in any automotive application and routes through a very specific path between the strut tower and the engine forward tilt. Any extra harness length will contact rotating components.

Fits the Vaneo Extended Wheelbase Without Modification: The Vaneo (W414) shares the W168 front suspension and ABS architecture despite its 12-inch longer wheelbase and taller body. The front sensor mounting, harness routing, and connector are identical between the A-Class and Vaneo, making the 1685400117 a dual-application sensor.

Bosch ABS 5.3 Compact Compatible: The W168 uses a compact version of Bosch ABS 5.3 system optimized for small-car packaging. The sensor signal output is specifically calibrated for the ABS 5.3 Compact lower operating voltage (9-12V vs. the standard 12-14V of full-size Mercedes models) and its unique tone ring geometry. Standard Bosch sensors intended for larger Mercedes models will produce implausible-signal DTCs on the W168.

Product Overview

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Why Choose ZENTRAQKMS

ZENTRAQKMS is committed to delivering automotive sensors that meet or exceed OEM specifications. Every ABS wheel speed sensor is manufactured in ISO/TS 16949 certified facilities using premium-grade components — including samarium-cobalt magnets for thermal stability, Hall-effect ICs from Infineon and Bosch-licensed suppliers, and silicone-jacketed harnesses for extreme-temperature durability. Each sensor undergoes 100% end-of-line testing on dynamic encoder wheel rigs before packaging.