The JL and Gladiator brake part on this page is the front wheel-speed sensor, Mopar 68394210AH. It supersedes 68394210AC through AG. A failed front sensor is one of the cheaper reasons the ABS and traction lights come on, and it is the part to rule out before you blame the module or a network code.
JK sensors do not carry over. The JK front sensor is 68003281AA, and the late-JK module 68259556AE is a different truck. JL owners usually land on those pages by searching the symptom, not the part number.
Pads, rotors, and the JL ABS module are not listed. If the lights name one front wheel, start with that sensor and the harness at the knuckle. If the code is a communication fault such as U0121, the sensor is still the first cheap check. On stop-start JLs, an auxiliary-battery bypass is the next JL-specific place that code shows up. That history is on the JL electrical page, not here.
What this category covers
- Front wheel-speed sensor 68394210AH for the JL and Gladiator
- The supersession chain from 68394210AC through AG
- Why a JK sensor listing is the wrong tab for this truck
Parts in this category
Each row links to the child part page for that SKU: the current Mopar number, what it supersedes, aftermarket cross-references, failure symptoms, and whether to rebuild or replace. Every number on those pages cites a source.
| Part | Mopar # | Fits |
|---|---|---|
| Front ABS Wheel Speed Sensor | 68394210AH | 2018-and-later Wrangler JL and Gladiator JT, front left or right, per Mopar dealer listings. |
When to replace
Replace the sensor on the wheel the code names, after you look at the connector and the harness for rub-through or trail damage. There is nothing to rebuild. If both fronts set codes at once, or the fault is lost communication with the module, a pair of sensors is unlikely to be the whole story. Check power, grounds, and, on stop-start JLs, whether an auxiliary-battery bypass is in the history.
Safety
An ABS or traction light that stays on means those systems may be offline. Do not treat it as a bulb. The sensor itself is low current. The brake hydraulics are not. If the pedal is soft, the Jeep pulls, or fluid is present at a wheel, that is a brake repair, not a sensor swap. Chock the wheels before you work at the knuckle.
Related guides
Other systems
- JK Brakes & ABS
- JK Cooling
- JK Engine
- JK Steering & Suspension
- JK Heating & A/C
- JK Electrical
- JK Body & Doors
- JK Fluids & Filters
- JL Cooling
- JL Engine
- JL Steering & Suspension
- JL Electrical
- JL Fluids & Filters
Part numbers change as Mopar supersedes them. Match the number on your old part, or run the VIN at a Mopar counter, before you order. Back to the parts lookup.