Where Is 2016 Jeep Cherokee ESS Battery Located?
The ESS (Engine Start-Stop) battery in a 2016 Jeep Cherokee is typically located in the rear cargo area, beneath the trim panel on the right side. To access it, remove the storage compartment cover or trim panel near the spare tire. The ESS battery is a secondary battery supporting the start-stop system, separate from the main 12V battery located in the engine bay (driver’s side). Always disconnect the negative terminal first during replacement to avoid electrical shorts.
How does the ESS battery differ from the main battery?
The ESS battery is a smaller AGM (Absorbent Glass Mat) battery designed for frequent charge-discharge cycles, while the main battery provides primary power for ignition and electronics. The ESS system relies on both batteries to reduce engine idling during stops.
In the 2016 Cherokee, the ESS battery prioritizes rapid energy delivery for restarts, whereas the main battery handles sustained loads like headlights and infotainment. Pro Tip: Use a multimeter to test ESS battery voltage—it should read ≥12.6V when fully charged. If the start-stop function disables itself, the ESS battery may be failing. For example, a depleted ESS battery might trigger dashboard warnings like “Service Stop/Start System.”
Why is the ESS battery placed in the cargo area?
Jeep positions the ESS battery in the rear to optimize weight distribution and reduce wiring complexity. Placing it near the rear axle improves vehicle balance, especially during frequent stop-start cycles in urban driving. Additionally, isolating it from engine heat extends its lifespan.
Compared to the main battery’s engine bay location, the cargo area offers cooler operating temperatures, critical for AGM battery efficiency. For instance, temperatures above 35°C can accelerate sulfation in conventional batteries, but AGM’s sealed design mitigates this.
| Battery Type | Location | Function |
|---|---|---|
| Main Battery | Engine Bay | Ignition, electronics |
| ESS Battery | Rear Cargo | Start-stop system |
Battery Expert Insight
FAQs
No—use only the main battery’s terminals for jump-starting. The ESS battery’s lower capacity and circuitry aren’t designed for high-current jumps.
How often should the ESS battery be replaced?
Every 4–5 years, depending on usage. Frequent short trips accelerate wear due to repeated cycling.