The 2018 Freightliner Sprinter 3500 has 21 electrical connector parts with verified fitment on this page — 9 part types and 5 brands, covering the 3.0L V6 DIESEL Turbocharged engine. Each part includes a manufacturer part number and application notes.
The connector system on the 2018 Freightliner Sprinter 3500 supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules. The largest groups are Trailer Connector (11 parts), A/C Refrigerant Pressure Switch Connector (2 parts) and ABS Wheel Speed Sensor Connector (2 parts). The other 6 part types cover the remaining 6 parts.
Every part on this page is matched to the 3.0L V6 DIESEL Turbocharged — the only engine offered in the 2018 Freightliner Sprinter 3500.
The most listed brands for 2018 Freightliner Sprinter 3500 electrical connector parts are CURT (14 parts), STANDARD MOTOR PRODUCTS (3 parts) and HOLSTEIN (2 parts), plus 2 more brands.
3 parts on this 2018 Freightliner Sprinter 3500 page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including CURT 56415 (Trailer Connector) and CURT 55415 (Trailer Connector). Click any part number to see every vehicle that part fits.
A/C Refrigerant Pressure Switch Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN | 2HAR0060 | 🇺🇸 US | View on Amazon | |
| STANDARD MOTOR PRODUCTS | S2316 | 🇺🇸 US | Connector Shape: OvalNumber of Splice Connectors Included: 3 | View on Amazon |
This table covers the harness connectors at the A/C Refrigerant Pressure Switch. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
2 A/C Refrigerant Pressure Switch Connector parts for the 2018 Freightliner Sprinter 3500 come from 2 brands — HOLSTEIN and STANDARD MOTOR PRODUCTS.
This group includes HOLSTEIN 2HAR0060 and STANDARD MOTOR PRODUCTS S2316.
ABS Wheel Speed Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN | 2HAR0036 | 🇺🇸 US | Includes ABS Wheel Speed Sensor Wire Harness | View on Amazon |
| STANDARD MOTOR PRODUCTS | S1686 | 🇺🇸 US | Connector Shape: OvalBlack | View on Amazon |
This table covers the harness connectors at each ABS wheel-speed sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
2 ABS Wheel Speed Sensor Connector parts are listed for the 2018 Freightliner Sprinter 3500, from HOLSTEIN and STANDARD MOTOR PRODUCTS.
Part numbers include HOLSTEIN 2HAR0036 and STANDARD MOTOR PRODUCTS S1686.
Blower Motor Control Module / Resistor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FOUR SEASONS | 70070 | 🇺🇸 US | View on Amazon |
This table covers the connectors at the blower resistor or control module. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
This group shows a single part: FOUR SEASONS 70070.
Camshaft Position Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 1P2565 | 🇺🇸 US | View on Amazon |
This table covers the harness connectors at the Camshaft Position Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
One part is listed for the 2018 Freightliner Sprinter 3500 — WELLS 1P2565.
Trailer Adapter Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CURT | 57101 | 🇺🇸 US | 7-Way Round RV To 4-Way Flat Adapter | View on Amazon |
This table covers the harness connectors at the Trailer Adapter. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
One part is listed for the 2018 Freightliner Sprinter 3500 — CURT 57101.
Trailer Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CURT Popular | 56415 | 🇺🇸 US | Replacement 7-Way RV Blade OEM SocketTwist-In | View on Amazon |
| CURT Popular | 55415 | 🇺🇸 US | Replacement 7-Way RV Blade OEM Socket | View on Amazon |
| CURT Popular | 56229 | 🇺🇸 US | 7-Way USCAR Electrical ConnectorLength: 24 in. | View on Amazon |
| CURT | 55515 | 🇺🇸 US | Custom Wiring ConnectorOE 4-Way Flat | View on Amazon |
| CURT | 56515 | 🇺🇸 US | Custom Wiring Connector5-Way Flat | View on Amazon |
| CURT | 51535 | 🇺🇸 US | Trailer Brake Controller Harness | View on Amazon |
| CURT | 55774 | 🇺🇸 US | OEM Vehicle to Trailer Connector with Harness7-Way and 4-Way | View on Amazon |
| CURT | 57015 | 🇺🇸 US | OEM Replacement Dual-Output 7 and 4 Way ConnectorPlugs Into USCAR Socket | View on Amazon |
| CURT | 55384 | 🇺🇸 US | Custom Wiring Connector4-Way Flat | View on Amazon |
| CURT | 57020 | 🇺🇸 US | OEM Replacement Dual-Output 7 and 4 Way ConnectorPackaged | View on Amazon |
| CURT | 56584 | 🇺🇸 US | Custom Wiring Harness5-Way Flat | View on Amazon |
This table covers the trailer-lighting connectors at the hitch. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
11 Trailer Connector parts for the 2018 Freightliner Sprinter 3500 come from CURT. The "Popular" part is CURT 56415.
Trailer Extension Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CURT | 56475 | 🇺🇸 US | Custom Wiring Harness Extension | View on Amazon |
This table covers the harness connectors at the Trailer Extension. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
One part is listed for the 2018 Freightliner Sprinter 3500 — CURT 56475.
Trailer Wire Converter
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CURT | 56236 | 🇺🇸 US | Multi-Function Taillight ConverterConverts 2-Wire/3-Wire/PWM Stop/Turn System To 2-Wire Trailer Light Wiring | View on Amazon |
This table covers the Trailer Wire converters. Typical signs include a sulfur smell, rattling substrate, or an efficiency code. Confirm CARB vs Federal certification in the notes before ordering.
This group shows a single part: CURT 56236.
Water Pump Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | S2832 | 🇺🇸 US | Auxiliary Water Pump | View on Amazon |
This table covers the harness connectors at the Water Pump. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
This group shows a single part: STANDARD MOTOR PRODUCTS S2832.
Buying Electrical Connector Parts for a 2018 Freightliner Sprinter 3500
On this vehicle, the connector system supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules.
- Confirm you have the 3.0L V6 DIESEL Turbocharged engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, use heat-shrink crimp connectors rather than twist-and-tape for any pigtail splice, especially outside the cabin.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Trailer Connector and A/C Refrigerant Pressure Switch Connector .
Frequently Asked Questions
How many electrical connector parts fit the 2018 Freightliner Sprinter 3500?
Our catalog currently lists 21 electrical connector parts for the 2018 Freightliner Sprinter 3500 across 9 subcategories and 5 brands, covering the 3.0L V6 DIESEL Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical connector problems on a 2018 Freightliner Sprinter 3500?
Common symptoms include intermittent faults that move when the harness is wiggled, green corrosion inside a plug, or melted connector housings near heat sources. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, use heat-shrink crimp connectors rather than twist-and-tape for any pigtail splice, especially outside the cabin.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2018 Freightliner Sprinter 3500 was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2018 Freightliner Sprinter 3500?
Every part on this page is matched to the 3.0L V6 DIESEL Turbocharged engine. Then match the connector by terminal count and keyway, not just appearance — many families look identical but will not lock. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2018 Freightliner Sprinter 3500
Electrical Connector Parts for Other Freightliner Sprinter 3500 Years
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