Dacall EVAP Leak Detection Pump 04861961AD – Direct-Fit EVAP Module, Detects 0.020in Leaks

The Dacall 04861961AD Evaporative Emissions System Leak Detection Pump is a direct-fit EVAP integrity module that monitors pressure changes to identify small vapor leaks and restore proper emission system function.

This replacement EVAP leak detection pump is engineered to match OEM fit and performance for a wide range of Chrysler, Dodge, Jeep and Ram vehicles. It uses a diaphragm-switch sensing system to detect minute pressure or vacuum shifts in the evaporative emissions canister and related plumbing, helping technicians and vehicle owners diagnose leaks as small as 0.020 in (0.5 mm). Built with automotive-grade materials and an OE-style electrical connector, the module prioritizes durability and reliable signaling under under-hood conditions.

How does this module detect EVAP leaks?

The unit employs a precision-calibrated diaphragm and switch that respond to tiny pressure and vacuum variations within the EVAP system. When the diaphragm moves beyond its calibrated threshold, the switch changes state and signals the vehicle's diagnostic system, indicating a potential leak or fault condition.

• Diaphragm-switch design senses changes accurately.
• Detects leaks down to approximately 0.020 in (0.5 mm).
• Calibrated response minimizes false readings and aids diagnostics.
• Works with onboard diagnostics to flag EVAP faults for repair.

Will this part fit my vehicle and replace the OEM number?

This Dacall ESIM is manufactured to replace specific original part numbers and fits multiple model years across Chrysler, Dodge, Jeep and Ram lineups. Confirm fitment with your vehicle’s model year and engine variant to ensure direct compatibility before purchase.

• Replaces 04861961AD and related OEM numbers including 4861961AA/AB/AC and 4891686AA.
• Compatible with Chrysler 200 (2015–2017) and 300 (2007, 2020–2023).
• Fits Dodge Challenger/Charger (2020–2023), Dakota (2007–2010), Dart (2013–2016), Ram 1500 3.7L (2007–2008).
• Works with Jeep Cherokee, Compass, Gladiator, Grand Wagoneer and Renegade model ranges listed.

How durable and reliable is the Dacall leak detection pump?

The pump is built to withstand automotive environments with materials selected for temperature and fuel resistance. An OE-style connector, fuel-resistant O-ring and high-temp housing help ensure a secure seal and consistent electrical performance over time.

• Automotive-grade housing rated from -40°F to 275°F (-40°C to 135°C).
• Fuel-resistant O-ring for long-lasting sealing against evaporative vapors.
• Precision-calibrated diaphragm for repeatable pressure response.
• OE-style electrical connector for stable signal transmission and easy installation.

What should I expect during installation and use?

Installation is intended to be straightforward when the module is a confirmed match for the vehicle’s OEM part number. After installation, the vehicle’s onboard diagnostic system can perform EVAP checks and confirm that leaks are resolved or to indicate further inspection if issues persist.

• Simple swap for matching OEM part numbers with plug-and-play connector.
• May require clearing diagnostic trouble codes after replacement.
• Best paired with inspection of hoses, canister, and purge valve for full system repair.
• Helps technicians pinpoint small leaks to reduce repeat troubleshooting.

Who is this for: The Dacall 04861961AD EVAP Leak Detection Pump is intended for vehicle owners, independent repair shops and fleet technicians who need a reliable, OEM-quality replacement module for diagnosing and restoring EVAP system integrity on supported Chrysler, Dodge, Jeep and Ram models. It’s a suitable choice when the original EVAP integrity module has failed or when accurate leak detection is required to pass emission inspections or complete repairs.