The 2021 Isuzu NPR has 5 electrical connector parts with verified fitment on this page — 3 part types and 2 brands, covering both the 5.2L L4 DIESEL Turbocharged and the 6.6L V8. Each part includes a manufacturer part number and application notes.
On the 2021 Isuzu NPR, the connector system supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules. All 5 listed parts are Ignition Coil Connector (3 parts), A/C Refrigerant Pressure Switch Connector (1 part) and Manifold Pressure (MAP) Sensor Connector (1 part).
The 2021 Isuzu NPR was sold with both the 5.2L L4 DIESEL Turbocharged and the 6.6L V8. 1 part fits every engine; the other 4 are engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2021 Isuzu NPR electrical connector parts are STANDARD MOTOR PRODUCTS (4 parts) and ACDELCO (1 part).
Each part number listed for the 2021 Isuzu NPR opens a page with every vehicle that part fits.
A/C Refrigerant Pressure Switch Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 NPR engines | S3229 | 🇺🇸 US 🇨🇦 CA | NPR-HDwith 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.
Ignition Coil Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Fits: 6.6L V8 | PT2368 | 🇺🇸 US 🇨🇦 CA | GoldShape: Rectangle | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 6.6L V8 | HP4485 | 🇺🇸 US 🇨🇦 CA | HandypackWiring Harness Length (mm): 304.8 | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 6.6L V8 | 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 2021 Isuzu NPR, from STANDARD MOTOR PRODUCTS and ACDELCO.
This group includes ACDELCO PT2368, STANDARD MOTOR PRODUCTS HP4485 and STANDARD MOTOR PRODUCTS S761.
Manifold Pressure (MAP) Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 5.2L L4 DIESEL Turbocharged | S2212 | 🇺🇸 US 🇨🇦 CA | NPR-HD | View on Amazon |
This table covers the harness connectors at the Manifold Pressure (MAP) 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 2021 Isuzu NPR — STANDARD MOTOR PRODUCTS S2212.
Buying Electrical Connector Parts for a 2021 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: Ignition Coil Connector and A/C Refrigerant Pressure Switch Connector .
Frequently Asked Questions
How many electrical connector parts fit the 2021 Isuzu NPR?
Our catalog currently lists 5 electrical connector parts for the 2021 Isuzu NPR across 3 subcategories and 2 brands, covering both the 5.2L L4 DIESEL Turbocharged and the 6.6L V8. Each part is matched to the engine(s) it fits.
Do electrical connector parts differ between 2021 Isuzu NPR engines?
Some do. 1 part fits every engine; the other 4 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 2021 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 2021 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 2021 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 2021 Isuzu NPR
Electrical Connector Parts for Other Isuzu NPR Years
Switch vehicle or jump to a subcategory
Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.