This page lists 21 automatic transmission parts for the 2003 Isuzu NPR, across 4 part types, covering both the 4.8L L4 DIESEL Turbocharged and the 5.7L V8. Every part shows its brand, manufacturer part number and fitment notes.
On the 2003 Isuzu NPR, the automatic transmission covers the automatic gearbox and its supporting cast — filters, coolers, solenoids, mounts and torque-converter parts. Most of the listed parts are Rebuild Kit (8 parts), Filter (5 parts) and Shift Cable (5 parts). The other 1 part type covers the remaining 3 parts.
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.
The most listed brands for 2003 Isuzu NPR automatic transmission parts are PA CARGO (8 parts), ATP (3 parts) and VALVOLINE (3 parts), plus 5 more brands. Quality grades include Banner Kit, Overhaul Kit and Standard Replacement.
4 parts on this 2003 Isuzu NPR page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including WIX 51622 (Filter) and PA CARGO DK3400G (Rebuild Kit). Click any part number to see every vehicle that part fits.
Filter
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VARIOUS MFR Fits: 4.8L L4 DIESEL Turbocharged | PT1289 | 🇺🇸 US 🇨🇦 CA | Internal8972020670 | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WIX Popular Fits: 4.8L L4 DIESEL Turbocharged | 51622 | 🇺🇸 US 🇨🇦 CA | Spin-On Filter | View on Amazon |
| ATP Fits: 4.8L L4 DIESEL Turbocharged | B220 | 🇺🇸 US 🇨🇦 CA | Premium ReplacementWith 3rd Hand Gasket | View on Amazon |
| HASTINGS / BALDWIN Fits: 4.8L L4 DIESEL Turbocharged | LF517 | 🇺🇸 US 🇨🇦 CA | Spin-On | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VARIOUS MFR Fits: 4.8L L4 DIESEL Turbocharged | HT80007 | 🇺🇸 US 🇨🇦 CA | Spin-on | View on Amazon |
This table covers the replacement filters for this application — the table heading and notes say which circuit. Typical signs include restricted flow — long cranking, weak airflow, or dirty fluid after a short interval. Seat the new filter so it cannot bypass, and use the grade the notes call for.
5 Filter parts for the 2003 Isuzu NPR come from 4 brands — VARIOUS MFR, WIX, ATP and 1 other brand. The "Popular" part is WIX 51622.
The Economy section lists 1 option from VARIOUS MFR — the catalog's value-priced group. VARIOUS MFR PT1289 is listed in this group.
In the Standard Replacement grade, WIX, ATP and HASTINGS / BALDWIN supply 3 parts: built to original-equipment specification. A representative part number is WIX 51622.
1 further part sits outside the graded sections, with the same engine-level match.
Part numbers include WIX 51622, VARIOUS MFR PT1289 and ATP B220, among others listed above.
Rebuild Kit
Banner Kit (Overhaul Kit + Friction Clutch Plates)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PA CARGO Fits: 4.8L L4 DIESEL Turbocharged | DK3400ES | 🇺🇸 US 🇨🇦 CA | Banner Kit | View on Amazon |
| PA CARGO Fits: 4.8L L4 DIESEL Turbocharged | DK3400GS | 🇺🇸 US 🇨🇦 CA | Banner Kit | View on Amazon |
| PA CARGO Fits: 4.8L L4 DIESEL Turbocharged | DK9400CS | 🇺🇸 US 🇨🇦 CA | Banner Kit | View on Amazon |
Master Kit (Overhaul Kit + Friction & Steel Clutch Plates)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PA CARGO Popular Fits: 4.8L L4 DIESEL Turbocharged | DK3400G | 🇺🇸 US 🇨🇦 CA | Master Kit | View on Amazon |
| PA CARGO Fits: 4.8L L4 DIESEL Turbocharged | DK3400E | 🇺🇸 US 🇨🇦 CA | Master Kit | View on Amazon |
Overhaul Kit (Gaskets, Seals, O-Rings & Sealing Rings)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PA CARGO Popular Fits: 4.8L L4 DIESEL Turbocharged | K34900G | 🇺🇸 US 🇨🇦 CA | Overhaul Kit | View on Amazon |
| PA CARGO Fits: 4.8L L4 DIESEL Turbocharged | K34900E | 🇺🇸 US 🇨🇦 CA | Overhaul Kit | View on Amazon |
| PA CARGO Fits: 4.8L L4 DIESEL Turbocharged | K94900C | 🇺🇸 US 🇨🇦 CA | Overhaul Kit | View on Amazon |
This table covers the rebuild kits for this assembly.
PA CARGO supplies the 8 Rebuild Kit parts for the 2003 Isuzu NPR. PA CARGO DK3400G carries the "Popular" badge.
In the Banner Kit (Overhaul Kit + Friction Clutch Plates) grade, PA CARGO supplies 3 parts: grouped under the catalog's "Banner Kit (Overhaul Kit + Friction Clutch Plates)" designation — the notes column spells out what sets them apart. A representative part number is PA CARGO DK3400ES.
The Master Kit (Overhaul Kit + Friction & Steel Clutch Plates) section lists 2 options from PA CARGO — grouped under the catalog's "Master Kit (Overhaul Kit + Friction & Steel Clutch Plates)" designation — the notes column spells out what sets them apart. PA CARGO DK3400G is listed in this group.
In the Overhaul Kit (Gaskets, Seals, O-Rings & Sealing Rings) grade, PA CARGO supplies 3 parts: grouped under the catalog's "Overhaul Kit (Gaskets, Seals, O-Rings & Sealing Rings)" designation — the notes column spells out what sets them apart. A representative part number is PA CARGO K34900G.
Part numbers include PA CARGO DK3400G, PA CARGO DK3400ES and PA CARGO DK3400GS, among others listed above.
Shift Cable
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Popular Fits: 4.8L L4 DIESEL Turbocharged | 9247001 | 🇺🇸 US 🇨🇦 CA | Fits NPR Base Model3263mm Length | View on Amazon |
| ATP Fits: 4.8L L4 DIESEL Turbocharged | Y1392 | 🇺🇸 US 🇨🇦 CA | Fits NPR-HDLength: 28.50" | View on Amazon |
| ATP Fits: 4.8L L4 DIESEL Turbocharged | Y1565 | 🇺🇸 US 🇨🇦 CA | Mounting Length: 114.45 | View on Amazon |
| PIONEER Fits: 4.8L L4 DIESEL Turbocharged | CA1327 | 🇺🇸 US 🇨🇦 CA | Fits NPR-HDLength: 28.50" | View on Amazon |
| PIONEER Fits: 4.8L L4 DIESEL Turbocharged | CA1382 | 🇺🇸 US 🇨🇦 CA | Cable Steel | View on Amazon |
This table covers the Shift cables. Typical signs include a stretched or frayed cable, or a control that no longer reaches the end of its travel. Route the new cable through the same clips. A kinked cable binds and fails early.
5 Shift Cable parts are listed for the 2003 Isuzu NPR, from ATP, PIONEER and DORMAN. DORMAN 9247001 carries the "Popular" badge.
Part numbers include DORMAN 9247001, ATP Y1392 and ATP Y1565, among others listed above.
Transmission Fluid
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Fits: 4.8L L4 DIESEL Turbocharged | VV3246 | 🇺🇸 US 🇨🇦 CA | Max Life Multi-Vehicle or Maxlife Multi-Vehicle Full Synthetic ATF1 Quart | View on Amazon |
| VALVOLINE Fits: 4.8L L4 DIESEL Turbocharged | 773775 | 🇺🇸 US 🇨🇦 CA | Max Life Multi-Vehicle or Maxlife Multi-Vehicle Full Synthetic ATF1 Gallon | View on Amazon |
| VALVOLINE Fits: 4.8L L4 DIESEL Turbocharged | 881051 | 🇺🇸 US 🇨🇦 CA | Maxlife Multi-Vehicle Full Synthetic ATF5 Gallon Bay Box | View on Amazon |
This table covers the automatic-transmission fluids specified for this gearbox. Typical signs include harsh or delayed shifts, fluid that smells burnt, or a shudder at light throttle. Use exactly the specification in the notes. Automatic transmissions are unforgiving of the wrong fluid.
3 Transmission Fluid parts for the 2003 Isuzu NPR come from VALVOLINE.
Listed part numbers: VALVOLINE VV3246, VALVOLINE 773775 and VALVOLINE 881051.
Buying Automatic Transmission Parts for a 2003 Isuzu NPR
On this vehicle, the automatic transmission covers the automatic gearbox and its supporting cast — filters, coolers, solenoids, mounts and torque-converter parts.
- Match the engine first. Every automatic transmission 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 the filter and pan gasket with every fluid service, and flush the cooler lines when replacing a failed unit.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Rebuild Kit and Filter .
Frequently Asked Questions
How many automatic transmission parts fit the 2003 Isuzu NPR?
Our catalog currently lists 21 automatic transmission parts for the 2003 Isuzu NPR across 4 subcategories and 8 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 automatic transmission parts differ between 2003 Isuzu NPR engines?
Yes. Every automatic transmission 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 automatic transmission problems on a 2003 Isuzu NPR?
Common symptoms include delayed or harsh engagement, slipping under load, fluid that smells burnt, or shuddering at light throttle around 40 mph. 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, replace the filter and pan gasket with every fluid service, and flush the cooler lines when replacing a failed unit.
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 use exactly the fluid specification in the notes — automatic transmissions are the least forgiving component on the vehicle about fluid choice. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2003 Isuzu NPR
Automatic Transmission Parts for Other Isuzu NPR Years
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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.