Dacall EVAP Leak Detection Pump 4861962AA for Dodge & Jeep — OE-style EVAP integrity module, 0.020in sensitivity

Dacall's 4861962AA evaporative emissions leak detection pump is a direct-replacement EVAP integrity module engineered to restore accurate fuel-vapor monitoring on compatible Dodge, Jeep, Chrysler and Ram vehicles.

This EVAP system integrity module (ESIM) replaces worn or faulty leak-detection pumps that cause drivability errors, evaporative emissions faults, or failed readiness checks. Built to OEM-style tolerances and matching multiple factory part numbers, the pump restores the vehicle’s ability to pressurize and sense minute pressure and vacuum changes in the fuel-vapor system so technicians and onboard diagnostics can verify system tightness.

Which vehicles and model years will this pump fit?

This part covers a wide range of Chrysler, Dodge, Jeep and Ram applications across mid-2000s to recent model years. Fitment varies by model and engine; consult connectors and mounting match for final confirmation.

• Chrysler: 200 Convertible (2011–2014), 300 (2008–2019), Pacifica (2007–2008, 2017–2023), Sebring Convertible (2007–2010), Town & Country (2008–2016).
• Dodge: Caliber (2007–2012), Challenger (2008–2019), Charger (2011–2019), Grand Caravan (2008–2020), select Ram pickup years.
• Jeep: Compass (2007–2017), Liberty (2007), Patriot (2007–2017), Wrangler (2007–2024), Wrangler JK (2018).
• Ram: multiple 2500/3500/4500/5500 chassis and conventional applications with specified V8 engine years.

How does this ESIM detect leaks and what level of sensitivity does it offer?

The unit uses a diaphragm-switch sensing system to monitor small pressure and vacuum changes inside the EVAP lines and can detect leaks as small as roughly 0.020 inches (0.5 mm). It supplies the vehicle’s computer with precise signals needed for accurate EVAP diagnostics without relying on external tools for basic leak verification.

• Diaphragm-switch mechanism senses tiny pressure/vacuum variations.
• Sensitivity down to approximately 0.020 in (0.5 mm) leak size.
• Provides stable electrical feedback for onboard diagnostic tests.

Is this part built to last and what construction features matter?

Dacall engineered the pump with OE-quality materials to endure under-hood temperatures and exposure to fuel vapors. The housing, sealing O-ring and diaphragm are selected for fuel resistance and thermal stability so the unit continues to seal and respond accurately through normal service conditions.

• High-temp automotive-grade housing rated -40°F to 275°F.
• Fuel-resistant O-ring for reliable sealing and leak prevention.
• Precision-calibrated diaphragm for repeatable pressure response.
• OE-style electrical connector for secure fit and signal stability.

Which OEM part numbers does this replace and why is that helpful?

This ESIM is designed to replace several original equipment part numbers, making it easier to find a correct aftermarket substitute without cross-referencing multiple catalog listings. Matching OEM numbers also helps ensure compatible fitment and expected electrical/mechanical performance.

• Replaces 4861962AA, 4861962AB, 4861962AC and related OEM references.
• Cross-references include 4891685AA/AB, 52129436AB and aftermarket IDs like ESM1001 and 310-215.
• Direct-fit connector and mounting reduce installation time and adaptation needs.

Who is this for? Technicians, mobile mechanics and DIY owners who need a reliable, OEM-style EVAP leak detection pump for Dodge, Jeep, Chrysler or Ram vehicles will find this Dacall ESIM useful. It’s intended for applications where the vehicle is showing EVAP faults, failed readiness, or where a deteriorated pump needs replacement to restore proper emissions system monitoring. Always verify exact vehicle year, engine and harness compatibility before installation.