The 2003 Isuzu NPR has 18 ignition parts with verified fitment on this page — 4 part types and 9 brands, covering both the 4.8L L4 DIESEL Turbocharged and the 5.7L V8. Each part includes a manufacturer part number and application notes.
The ignition system on the 2003 Isuzu NPR delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules. The largest groups are Ignition Coil (7 parts), Spark Plug (6 parts) and Crankshaft Position Sensor (4 parts). The other 1 part type covers the remaining 1 part.
The 2003 Isuzu NPR was sold with both the 4.8L L4 DIESEL Turbocharged and the 5.7L V8. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
9 brands supply ignition parts for the 2003 Isuzu NPR, led by STANDARD MOTOR PRODUCTS (4 parts), CHAMPION (4 parts) and ACDELCO (3 parts), plus 6 more brands. Quality grades include Economy, Standard Replacement and Double Platinum.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2003 Isuzu NPR. 4 parts have it, including DELPHI CE20003 (Ignition Coil) and ACDELCO 14 (Spark Plug). Each part number opens a page with every vehicle that part fits.
Crankshaft Position Sensor
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SKP Fits: 5.7L V8 | SK917755 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| STANDARD MOTOR PRODUCTS Fits: 5.7L V8 | PC123T | 🇺🇸 US 🇨🇦 CA | T-Series | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Fits: 5.7L V8 | 2134761 | 🇺🇸 US 🇨🇦 CA | GoldSpacers not included | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 5.7L V8 | PC123 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the sensors that report crankshaft position and engine speed. Typical signs include a stall, a no-start, or a code for cam or crank correlation. Check the connector and the reluctor gap before replacing the sensor.
4 Crankshaft Position Sensor parts for the 2003 Isuzu NPR come from 3 brands — STANDARD MOTOR PRODUCTS, SKP and ACDELCO.
The Economy section lists 2 options from SKP and STANDARD MOTOR PRODUCTS — the catalog's value-priced group. SKP SK917755 is listed in this group.
In the Standard Replacement grade, ACDELCO and STANDARD MOTOR PRODUCTS supply 2 parts: built to original-equipment specification. A representative part number is ACDELCO 2134761.
Listed part numbers: SKP SK917755, STANDARD MOTOR PRODUCTS PC123T and ACDELCO 2134761, plus the other parts above.
Distributor Breaker Plate
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 5.7L V8 | 90449 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the Distributor Breaker plates. Typical signs include warpage, cracks, or a plate that no longer locates the assembly. Confirm which plate the notes describe — backing plates, clutch plates and strike plates are different parts.
One part is listed for the 2003 Isuzu NPR — DORMAN 90449.
Ignition Coil
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Fits: 5.7L V8 | DR49F | 🇺🇸 US 🇨🇦 CA | NPR Base Model | View on Amazon |
| HOLSTEIN Fits: 5.7L V8 | 2IGC0032 | 🇺🇸 US 🇨🇦 CA | NPR Base Model | View on Amazon |
| SKP Fits: 5.7L V8 | SKIC121 | 🇺🇸 US 🇨🇦 CA | NPR Base Modelwith Round Ignition Coil | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 5.7L V8 | DR49T | 🇺🇸 US 🇨🇦 CA | T-Series | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DELPHI Popular Fits: 5.7L V8 | CE20003 | 🇺🇸 US 🇨🇦 CA | NPR Base Model | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 5.7L V8 | DR49 | 🇺🇸 US 🇨🇦 CA | Blue Streak | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| UNITED MOTOR PRODUCTS Popular Fits: 5.7L V8 | C549 | 🇺🇸 US 🇨🇦 CA | NPR Base Model | View on Amazon |
This table covers the coils that fire each spark plug. Typical signs include a misfire that follows one cylinder, a snap in damp weather, or a coil that is swollen or cracked. Swap a suspect coil with a neighbor to confirm, then replace boots that tore on the way off.
7 Ignition Coil parts for the 2003 Isuzu NPR come from 6 brands — STANDARD MOTOR PRODUCTS, FVP, HOLSTEIN and 3 other brands. The "Popular" part is DELPHI CE20003.
The Economy section: 4 options from FVP, HOLSTEIN, SKP and 1 other brand. FVP DR49F is listed in this group.
In the Premium grade, DELPHI and STANDARD MOTOR PRODUCTS supply 2 parts: a step above OE specification in materials, tolerances or warranty terms. A representative part number is DELPHI CE20003.
Standard Replacement: 1 part, from UNITED MOTOR PRODUCTS. A representative part number is UNITED MOTOR PRODUCTS C549.
Listed part numbers: DELPHI CE20003, FVP DR49F and HOLSTEIN 2IGC0032, plus the other parts above.
Spark Plug
Summary: Notes include pre-set gaps of 0.05", 0.055" and 0.060". Replacement brands in this table include CHAMPION and ACDELCO.
Copper / Nickel
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CHAMPION Fits: 5.7L V8 | 13 | 🇺🇸 US | Copper PlusPre-Set Gap: 0.055" | View on Amazon |
Double Platinum (lasts up to 3x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Fits: 5.7L V8 | 41942 | 🇺🇸 US 🇨🇦 CA | ProfessionalDouble Platinum | View on Amazon |
| CHAMPION Fits: 5.7L V8 | 7013 | 🇺🇸 US | Double Platinum PowerPre-Set Gap: 0.05" | View on Amazon |
Iridium (lasts up to 4x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CHAMPION Fits: 5.7L V8 | 9404 | 🇺🇸 US | IridiumPre-Set Gap: 0.055" | View on Amazon |
Platinum (lasts up to 2x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular Fits: 5.7L V8 | 14 | 🇺🇸 US 🇨🇦 CA | ProfessionalRapidfire | View on Amazon |
| CHAMPION Popular Fits: 5.7L V8 | 3013 | 🇺🇸 US | Platinum PowerPre-Set Gap: 0.06" | View on Amazon |
This table covers the spark plugs for this engine. Typical signs include misfire under load, rough idle, or a flashing check-engine light. Verify the gap even on pre-gapped plugs, and replace coil boots that come off a high-mileage engine.
6 Spark Plug parts are listed for the 2003 Isuzu NPR, from CHAMPION and ACDELCO. ACDELCO 14 carries the "Popular" badge.
In the Copper / Nickel grade, CHAMPION supplies 1 part: grouped under the catalog's "Copper / Nickel" designation — the notes column spells out what sets them apart. A representative part number is CHAMPION 13.
In the Double Platinum (lasts up to 3x longer than Copper / Nickel) grade, ACDELCO and CHAMPION supply 2 parts: grouped under the catalog's "Double Platinum (lasts up to 3x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. A representative part number is ACDELCO 41942.
The Iridium (lasts up to 4x longer than Copper / Nickel) section lists 1 option from CHAMPION — grouped under the catalog's "Iridium (lasts up to 4x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. CHAMPION 9404 is listed in this group.
In the Platinum (lasts up to 2x longer than Copper / Nickel) grade, ACDELCO and CHAMPION supply 2 parts: grouped under the catalog's "Platinum (lasts up to 2x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. A representative part number is ACDELCO 14.
This group includes ACDELCO 14, CHAMPION 13 and ACDELCO 41942 and the remaining parts above.
Buying Ignition Parts for a 2003 Isuzu NPR
On this vehicle, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules.
- Match the engine first. Every ignition part here is 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, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
- 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 and Spark Plug .
Frequently Asked Questions
How many ignition parts fit the 2003 Isuzu NPR?
Our catalog currently lists 18 ignition parts for the 2003 Isuzu NPR across 4 subcategories and 9 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 ignition parts differ between 2003 Isuzu NPR engines?
Yes. Every ignition part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. 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 ignition problems on a 2003 Isuzu NPR?
Common symptoms include misfires under load, rough idle, flashing check-engine light, or poor starting in damp weather. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What spark-plug gap is listed for the 2003 Isuzu NPR?
Notes on this page include pre-set gaps of 0.05", 0.055" and 0.060". Still verify against spec — even “pre-gapped” plugs should be checked before they go in.
What should I replace at the same time?
Where labor overlaps, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
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 gap matters even on “pre-gapped” plugs — verify against spec, and replace coil boots when they come off a high-mileage engine. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2003 Isuzu NPR
Ignition Parts for Other Isuzu NPR Years
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