Dacall EVAP Leak Detection Pump for Dodge/Jeep/Chrysler/Ram — Replacement 4861962AA, OE-fit with Calibrated Diaphragm

This replacement EVAP (evaporative emissions) leak detection pump, built to match OEM form and function, detects small leaks in the fuel vapor system and communicates pressure events to the vehicle’s diagnostics. The Dacall unit is made from high-temperature automotive materials, includes an OE-style electrical connector and calibrated diaphragm sensing to reliably sense both vacuum and pressure changes that indicate EVAP leakage.

How does this pump help my vehicle’s emission system?

The leak detection pump monitors EVAP system pressure and vacuum to find leaks that allow fuel vapors to escape. When the module senses deviations beyond its calibration threshold, it alerts the vehicle’s control module so you can diagnose and repair the issue before it affects emissions testing or fuel system performance.

• Diaphragm-switch sensing detects tiny leaks down to about 0.020 in (0.5 mm).
• Transmits stable electrical signals via an OE-style connector for accurate diagnostics.
• Helps prevent false EVAP fault codes by maintaining consistent pressure response.

Will this part fit my Dodge, Jeep, Chrysler or Ram?

Dacall designed this replacement to cover a wide range of models and years — verify fitment with your VIN and application list before ordering. It replaces several OEM part numbers and fits many Chrysler, Dodge, Jeep and Ram vehicles across multiple model years listed in the product fitment details.

• Fits Dodge Caliber, Challenger, Charger, Grand Caravan and select Ram models (years vary by model).
• Coverage includes Jeep Compass, Liberty, Patriot and Wrangler model ranges listed by year.
• Also compatible with many Chrysler models such as 200 Convertible, 300, Pacifica, Sebring Convertible and Town & Country.

What are the build quality and specification highlights?

The module uses automotive-grade materials and a precision-calibrated diaphragm to ensure repeatable readings in demanding under-hood conditions. Components are chosen for fuel resistance and temperature tolerance so the unit performs reliably across typical automotive operating ranges.

• High-temp housing rated approximately -40°F to 275°F for durability.
• Fuel-resistant O-ring provides a consistent sealing surface to prevent false leaks.
• Calibrated diaphragm-switch for accurate pressure and vacuum sensing.

How do I replace and test the Dacall leak detection pump?

Replacement usually requires simple access to the EVAP canister area and an electrical connector swap; basic hand tools are often sufficient. After installation, run the vehicle’s EVAP self-test or use a diagnostic scanner to confirm proper operation and that no new fault codes are present.

• Disconnect battery and unplug OE-style connector before removal.
• Replace O-ring and secure module to original mounting points to maintain seal integrity.
• Verify operation with OEM diagnostic routines or a code scanner post-installation.

Who is this for: Technicians, DIY mechanics and fleet owners who need a reliable, OEM-quality replacement EVAP leak detection pump for compatible Dodge, Jeep, Chrysler and Ram vehicles. If you’re troubleshooting EVAP fault codes, preparing a vehicle for inspection, or replacing a failed module, this Dacall unit offers direct-fit compatibility and tested components to restore leak detection performance.