Dacall EVAP Leak Detection Pump 4861962AA Replacement ESIM — OE Fit, Diaphragm Sensor

The Dacall 4861962AA evaporative emissions leak detection pump is an OEM-quality EVAP system integrity module that monitors pressure/vacuum changes to help identify gas-vapor leaks.

This replacement EVAP leak detection pump (ESIM) is built to match factory performance and fit a wide range of Chrysler, Dodge, Jeep and Ram models. It uses a diaphragm-switch sensing mechanism and OE-style electrical connector so diagnostics remain accurate and the emissions system can be tested reliably after repair or maintenance.

How does this pump detect EVAP leaks?

The unit senses tiny pressure and vacuum shifts inside the sealed EVAP lines using a calibrated diaphragm and switch. When the diaphragm moves, the internal switch signals the vehicle's control module, enabling leak detection down to roughly 0.020 in (0.5 mm).

• Diaphragm-switch sensing system for fast response
• Detects leaks as small as 0.020 in (0.5 mm)
• Direct signal output compatible with factory diagnostics

Which vehicles will this part fit?

This Dacall ESIM replaces several factory part numbers and fits many Chrysler, Dodge, Jeep and Ram applications across model years listed by the manufacturer. Check the included fitment list against your vehicle’s year and engine to confirm compatibility before ordering.

• Chrysler: 200 Convertible (2011–2014), 300 (2008–2019), Pacifica (2007–2008, 2017–2023)
• Dodge: Caliber, Challenger, Charger, Grand Caravan, select Ram engines (years vary)
• Jeep: Compass, Liberty, Patriot, Wrangler (2007–2024 editions where listed)
• Ram: Select 1500/2500/3500/4500/5500 applications—verify engine and year

What makes the Dacall unit durable and reliable?

Materials and design focus on the same operating environment as the original equipment: elevated temperatures, exposure to fuel vapors and repeated pressure cycles. The housing and sealing materials are chosen to resist heat and fuel while the OE-style connector ensures a snug, consistent electrical connection.

• High-temp resistant housing rated for roughly -40°F to 275°F
• Fuel-resistant O-ring for leak-free sealing
• Precision-calibrated diaphragm for consistent pressure response
• OE-style connector for secure fit and reliable signal transmission

Will this replace my original part number?

Dacall designed this ESIM to be a direct replacement for multiple factory part numbers, making it easy to swap in without modifying wiring or mounting. Verify the part numbers listed against your vehicle's existing module to confirm a match.

• Replaces 4861962AA, 4861962AB, 4861962AC and related numbers
• Cross-references include 4891685AA/AB and 52129436AB among others
• Fits as a plug-and-play replacement when matched to vehicle fitment

Who is this for: This Dacall 4861962AA EVAP leak detection pump suits DIY mechanics, independent repair shops and fleet technicians who need a dependable, OEM-quality replacement for emission control diagnostics. It’s ideal for owners of the listed Chrysler, Dodge, Jeep and Ram models who require accurate EVAP testing and a robust part that stands up to heat and fuel exposure during normal vehicle operation.