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Dorman 645-321 Catalyst Monitor Sensor ConnectorOE Quality 60-Day Returns
Part #: 645-321

Dorman 645-321 Catalyst Monitor Sensor Connector

122 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Ford, Lincoln, and Mercury, Edge, Escape, Expedition, Explorer, F-150, F-250 Super Duty, F-350 Super Duty, Fiesta, Flex, Focus, Fusion, Mariner, Milan, MKC, MKS, MKT, MKX, MKZ, Mustang, Navigator, Taurus, Transit Connect, Transit-150, Transit-250, Transit-350, and Transit-350 HD
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST
Not what you need? See all Catalyst Monitor Sensor Connector options
Dorman 645-321 Catalyst Monitor Sensor Connector
BrandDorman
Part Number645-321
ColorBlack
ColorBlanco
ColorGray
ColorGris
ColorNaranja
ColorNegro
ColorOrange
ColorPlata
ColorSilver
ColorWhite
GenderMacho
GenderMale
Wiring Harness Length13.858
Wire Gauge Measurement16
Terminal TypeClavija
Terminal TypePin
ShapeRectangle
ShapeRectángulo
Wire Quantity4
Terminal Quantity4
Terminal GenderMacho
Terminal GenderMale
Contenidos del paquete1 empalme
Contenidos del paquete4 conectores de presión
Contenidos del paquete4 tubos termorretráctiles
Package Contents1 pigtail
Package Contents4 butt connectors
Package Contents4 heat shrink tubing

This part fits 122 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2020FordMustang5.2LV8N/A4 Cavity
2019FordEscape2.5LL4N/A4 Cavity
2019FordExplorer3.5LV6N/A4 Cavity
2019FordF-1505.0LV8N/A4 Cavity
2019FordFlex3.5LV6N/A4 Cavity
2019FordMustang5.2LV8N/A4 Cavity
2019FordTaurus3.5LV6N/A4 Cavity
2019LincolnMKTN/A4 Cavity
2018FordEscape2.5LL4N/A4 Cavity
2018FordExplorer3.5LV6N/A4 Cavity
2018FordF-1505.0LV8N/A4 Cavity
2018FordFlex3.5LV6N/A4 Cavity
2018FordMustang5.2LV8N/A4 Cavity
2018FordTaurus3.5LV6N/A4 Cavity
2018LincolnMKTN/A4 Cavity
2017FordEscape2.5LL4N/A4 Cavity
2017FordExplorer3.5LV6N/A4 Cavity
2017FordF-1503.5LV6N/A4 Cavity
2017FordFiesta1.0LL3N/A4 Cavity
2017FordFlex3.5LV6N/A4 Cavity
2017FordFocus2.0LL4N/A4 Cavity
2017FordMustang3.7LV6N/A4 Cavity
2017FordTaurus3.5LV6N/A4 Cavity
2017LincolnMKCN/A4 Cavity
2017LincolnMKTN/A4 Cavity
2017LincolnMKZ2.0LL4N/A4 Cavity
2016FordEscape2.5LL4N/A4 Cavity
2016FordExplorer3.5LV6N/A4 Cavity
2016FordF-1503.5LV6N/A4 Cavity
2016FordF-250 Super Duty6.2LV8N/A4 Cavity
2016FordF-350 Super Duty6.2LV8N/A4 Cavity
2016FordFiesta1.0LL3N/A4 Cavity
2016FordFlexN/A4 Cavity
2016FordFocus2.0LL4N/A4 Cavity
2016FordMustang3.7LV6N/A4 Cavity
2016FordTaurus3.5LV6N/A4 Cavity
2016FordTransit Connect2.5LL4N/A4 Cavity
2016LincolnMKCN/A4 Cavity
2016LincolnMKTN/A4 Cavity
2016LincolnMKZ3.7LV6N/A4 Cavity
2015FordEscape2.5LL4N/A4 Cavity
2015FordExplorer2.0LL4N/A4 Cavity
2015FordF-1503.5LV6N/A4 Cavity
2015FordF-250 Super Duty6.2LV8N/A4 Cavity
2015FordF-350 Super Duty6.2LV8N/A4 Cavity
2015FordFiesta1.0LL3N/A4 Cavity
2015FordFlexN/A4 Cavity
2015FordFocus2.0LL4N/A4 Cavity
2015FordFusion2.0LL4N/A4 Cavity
2015FordMustang3.7LV6N/A4 Cavity
2015FordTaurus3.5LV6N/A4 Cavity
2015FordTransit Connect2.5LL4N/A4 Cavity
2015FordTransit-1503.7LV6N/A4 Cavity
2015FordTransit-2503.7LV6N/A4 Cavity
2015FordTransit-3503.7LV6N/A4 Cavity
2015FordTransit-350 HD3.7LV6N/A4 Cavity
2015LincolnMKCN/A4 Cavity
2015LincolnMKS3.7LV6N/A4 Cavity
2015LincolnMKTN/A4 Cavity
2015LincolnMKXN/A4 Cavity
2015LincolnMKZ3.7LV6N/A4 Cavity
2014FordEdgeN/A4 Cavity
2014FordEscape2.5LL4N/A4 Cavity
2014FordExpedition5.4LV8N/A4 Cavity
2014FordExplorer2.0LL4N/A4 Cavity
2014FordF-1503.5LV6N/A4 Cavity
2014FordF-250 Super Duty6.2LV8N/A4 Cavity
2014FordF-350 Super Duty6.2LV8N/A4 Cavity
2014FordFiesta1.0LL3N/A4 Cavity
2014FordFlexN/A4 Cavity
2014FordFocus2.0LL4N/A4 Cavity
2014FordFusion2.0LL4N/A4 Cavity
2014FordTaurus3.5LV6N/A4 Cavity
2014FordTransit Connect2.5LL4N/A4 Cavity
2014LincolnMKS3.7LV6N/A4 Cavity
2014LincolnMKTN/A4 Cavity
2014LincolnMKXN/A4 Cavity
2014LincolnMKZ3.7LV6N/A4 Cavity
2014LincolnNavigator5.4LV8N/A4 Cavity
2013FordEdgeN/A4 Cavity
2013FordEscape2.5LL4N/A4 Cavity
2013FordExpedition5.4LV8N/A4 Cavity
2013FordExplorer2.0LL4N/A4 Cavity
2013FordF-1503.5LV6N/A4 Cavity
2013FordF-250 Super Duty6.2LV8N/A4 Cavity
2013FordF-350 Super Duty6.2LV8N/A4 Cavity
2013FordFlexN/A4 Cavity
2013FordFocus2.0LL4N/A4 Cavity
2013FordFusion2.0LL4N/A4 Cavity
2013FordTaurus3.5LV6N/A4 Cavity
2013LincolnMKS3.7LV6N/A4 Cavity
2013LincolnMKTN/A4 Cavity
2013LincolnMKXN/A4 Cavity
2013LincolnMKZ3.7LV6N/A4 Cavity
2013LincolnNavigator5.4LV8N/A4 Cavity
2012FordEdgeN/A4 Cavity
2012FordEscapeN/A4 Cavity
2012FordExpedition5.4LV8N/A4 Cavity
2012FordExplorerN/A4 Cavity
2012FordF-1503.5LV6N/A4 Cavity
2012FordF-250 Super Duty6.2LV8N/A4 Cavity
2012FordF-350 Super Duty6.2LV8N/A4 Cavity
2012FordFlexN/A4 Cavity
2012FordFocus2.0LL4N/A4 Cavity
2012FordFusion3.5LV6N/A4 Cavity
2012FordTaurusN/A4 Cavity
2012LincolnMKSN/A4 Cavity
2012LincolnMKTN/A4 Cavity
2012LincolnMKXN/A4 Cavity
2012LincolnMKZ3.5LV6N/A4 Cavity
2012LincolnNavigator5.4LV8N/A4 Cavity
2011FordEscapeN/A4 Cavity
2011FordExplorerN/A4 Cavity
2011FordF-1503.5LV6N/A4 Cavity
2011FordFlexN/A4 Cavity
2011FordFusion3.0LV6N/A4 Cavity
2011FordTaurusN/A4 Cavity
2011LincolnMKSN/A4 Cavity
2011LincolnMKTN/A4 Cavity
2011LincolnMKZ2.5LL4N/A4 Cavity
2011MercuryMarinerN/A4 Cavity
2011MercuryMilan2.5LL4N/A4 Cavity

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

CU2Z14S411ZBWPT1570

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.