12 Electrical connector parts are listed for the 2003 Isuzu NPR, in 6 part types, covering both the 4.8L L4 DIESEL Turbocharged and the 5.7L V8. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 2003 Isuzu NPR, the connector system supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules. 9 parts of the 12 listed are Oil Pressure Sender / Switch Connector (5 parts), Ignition Coil Connector (3 parts) and A/C Refrigerant Pressure Switch Connector (1 part). The other 3 part types cover the remaining 3 parts.
The 2003 Isuzu NPR was sold with both the 4.8L L4 DIESEL Turbocharged and the 5.7L V8. 10 parts fit every engine; the other 2 are engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2003 Isuzu NPR electrical connector parts are STANDARD MOTOR PRODUCTS (6 parts), ACDELCO (2 parts) and GPD (1 part), plus 3 more brands.
1 part on this 2003 Isuzu NPR page carries a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — STANDARD MOTOR PRODUCTS HP4440 (Oil Pressure Sender / Switch Connector). Click any part number to see every vehicle that part fits.
A/C Refrigerant Pressure Switch Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2003 NPR engines | S3229 | 🇺🇸 US 🇨🇦 CA | with 4 Blade Terminals | 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.
This group shows a single part: STANDARD MOTOR PRODUCTS S3229.
Blower Motor Control Module / Resistor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GPD Fits: 4.8L L4 DIESEL Turbocharged | 1712189 | 🇺🇸 US 🇨🇦 CA | Blower Motor Resistor Pigtailwith 4 Terminal(s) | 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: GPD 1712189.
Ignition Coil Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Fits: all 2003 NPR engines | PT2368 | 🇺🇸 US 🇨🇦 CA | GoldShape: Rectangle | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2003 NPR engines | HP4485 | 🇺🇸 US 🇨🇦 CA | HandypackWiring Harness Length (mm): 304.8 | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2003 NPR engines | S761 | 🇺🇸 US 🇨🇦 CA | Wiring Harness Length (mm): 304.8 | View on Amazon |
This table covers the harness connectors at the Ignition Coil. 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.
3 Ignition Coil Connector parts are listed for the 2003 Isuzu NPR, from STANDARD MOTOR PRODUCTS and ACDELCO. All of them fit every engine offered in the 2003 NPR.
Part numbers include ACDELCO PT2368, STANDARD MOTOR PRODUCTS HP4485 and STANDARD MOTOR PRODUCTS S761.
Oil Pressure Sender / Switch Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular Fits: all 2003 NPR engines | HP4440 | 🇺🇸 US 🇨🇦 CA | Handypack | View on Amazon |
| ACDELCO Fits: all 2003 NPR engines | PT2319 | 🇺🇸 US 🇨🇦 CA | GoldTerminal Gender: Female | View on Amazon |
| HOLSTEIN Fits: all 2003 NPR engines | 2HAR0067 | 🇺🇸 US 🇨🇦 CA | NPR Base Modelwith 3 Female Terminal | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2003 NPR engines | S619 | 🇺🇸 US 🇨🇦 CA | Connector Shape: RoundTerminal Type: Blade | View on Amazon |
| WALKER PRODUCTS Fits: all 2003 NPR engines | 2701045 | 🇺🇸 US 🇨🇦 CA | Terminal Type: Pin | View on Amazon |
This table covers the harness connectors at the Oil Pressure Sender / 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.
5 Oil Pressure Sender / Switch Connector parts for the 2003 Isuzu NPR come from 4 brands — STANDARD MOTOR PRODUCTS, ACDELCO, HOLSTEIN and 1 other brand. The "Popular" part is STANDARD MOTOR PRODUCTS HP4440. Every part fits both the 4.8L L4 DIESEL Turbocharged and the 5.7L V8.
Part numbers include STANDARD MOTOR PRODUCTS HP4440, ACDELCO PT2319 and HOLSTEIN 2HAR0067, among others listed above.
Speed Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2003 NPR engines | S2438 | 🇺🇸 US 🇨🇦 CA | Transmission Output | View on Amazon |
This table covers the harness connectors at the 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.
This group shows a single part: STANDARD MOTOR PRODUCTS S2438.
Temperature Sender / Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ROSTRA Fits: 5.7L V8 | 610072 | 🇺🇸 US 🇨🇦 CA | with GaugeSending Unit Switch Connector | View on Amazon |
This table covers the harness connectors at the Temperature Sender / 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 2003 Isuzu NPR — ROSTRA 610072.
Buying Electrical Connector Parts for a 2003 Isuzu NPR
On this vehicle, the connector system supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules.
- Match the engine first. Some electrical connector parts fit every engine; others are engine-specific. Each row shows which engine(s) it fits.
- 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: Oil Pressure Sender / Switch Connector and Ignition Coil Connector .
Frequently Asked Questions
How many electrical connector parts fit the 2003 Isuzu NPR?
Our catalog currently lists 12 electrical connector parts for the 2003 Isuzu NPR across 6 subcategories and 6 brands, covering both the 4.8L L4 DIESEL Turbocharged and the 5.7L V8. Each part is matched to the engine(s) it fits.
Do electrical connector parts differ between 2003 Isuzu NPR engines?
Some do. 10 parts fit every engine; the other 2 are engine-specific. Each row (and the filter at the top) shows which. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of electrical connector problems on a 2003 Isuzu NPR?
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 2003 Isuzu NPR 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 2003 Isuzu NPR?
First match the engine — each row shows which engine(s) the part fits. 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 2003 Isuzu NPR
Electrical Connector Parts for Other Isuzu NPR Years
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