The 2025 Isuzu NRR has 22 engine parts with verified fitment on this page — 9 part types and 8 brands, covering all 3 engine options (5.2L L4 DIESEL Turbocharged, 6.6L V8 and ELECTRIC). Each part includes a manufacturer part number and application notes.
The engine on the 2025 Isuzu NRR covers the internals and hard parts that build compression and keep oil where it belongs — gaskets, bearings, camshafts, lifters, seals and timing components. The largest groups are Oil (5 parts), Oil Filter (5 parts) and Exhaust Valve (2 parts). The other 6 part types cover the remaining 10 parts.
The 2025 Isuzu NRR was sold with 3 engines. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2025 Isuzu NRR engine parts are QUALCAST (10 parts), VALVOLINE (5 parts) and VARIOUS MFR (2 parts), plus 5 more brands. Quality grades include Standard Replacement, Economy and Heavy Duty / Diesel.
Each part number listed for the 2025 Isuzu NRR opens a page with every vehicle that part fits.
Cylinder Head Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ENGINE PRO Fits: 6.6L V8 | 2812688186 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the head gaskets that seal the block to the cylinder head. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.
This group shows a single part: ENGINE PRO 2812688186.
Exhaust Valve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| QUALCAST Fits: 5.2L L4 DIESEL Turbocharged | 1013122 | 🇺🇸 US 🇨🇦 CA | 1.456 Head DIA. 0.312 Stem. N-Series Trucks. (Mexico ELF 400-600). OEM # 8972098763 | View on Amazon |
| QUALCAST Fits: 5.2L L4 DIESEL Turbocharged | 1013464 | 🇺🇸 US 🇨🇦 CA | 1.456 Head DIA. 0.3120 Stem DIA. 5.520 OAL. OEM # 8981583761 | View on Amazon |
This table covers the exhaust valves that let combustion gas out of the cylinder. Typical signs include a circuit that will not hold, a whistle, or a code for this valve. A stuck valve is often debris. Clean the ports before installing the new one.
QUALCAST supplies both parts for the 2025 Isuzu NRR.
Listed part numbers: QUALCAST 1013122 and QUALCAST 1013464.
Intake Valve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| QUALCAST Fits: 5.2L L4 DIESEL Turbocharged | 1013121 | 🇺🇸 US 🇨🇦 CA | 1.457 Head DIA. 0.313 Stem. N-Series Trucks. (Mexico ELF 400-600). OEM # 8943958822 | View on Amazon |
| QUALCAST Fits: 5.2L L4 DIESEL Turbocharged | 1013463 | 🇺🇸 US 🇨🇦 CA | 1.457 Head DIA. 0.3130 Stem DIA. 5.530 OAL. OEM # 8980388700 | View on Amazon |
This table covers the intake valves that let air (and fuel, on port-injected engines) into the cylinder. Typical signs include a circuit that will not hold, a whistle, or a code for this valve. A stuck valve is often debris. Clean the ports before installing the new one.
QUALCAST supplies both parts for the 2025 Isuzu NRR.
Listed part numbers: QUALCAST 1013121 and QUALCAST 1013463.
Oil
Summary: Notes list SAE 10W-30 and SAE 15W-40. Confirm the engine and the weight on the filler cap before you buy. Replacement brands in this table include VALVOLINE.
Full Synthetic
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Fits: 5.2L L4 DIESEL Turbocharged | 909772 | 🇺🇸 US 🇨🇦 CA | Heavy Duty Full Synthetic SAE 15W-40 DIESEL1 Gallon | View on Amazon |
Heavy Duty / Diesel
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Fits: 5.2L L4 DIESEL Turbocharged | 909778 | 🇺🇸 US 🇨🇦 CA | Heavy Duty Conventional SAE 15W-40 DIESEL1 Gallon | View on Amazon |
Synthetic Blend
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Fits: 5.2L L4 DIESEL Turbocharged | 909766 | 🇺🇸 US 🇨🇦 CA | Heavy Duty Synthetic Blend SAE 15W-40 DIESEL1 Gallon | View on Amazon |
| VALVOLINE Fits: 5.2L L4 DIESEL Turbocharged | 909776 | 🇺🇸 US 🇨🇦 CA | Heavy Duty Synthetic Blend SAE 10W-30 DIESEL1 Gallon | View on Amazon |
| VALVOLINE Fits: 5.2L L4 DIESEL Turbocharged | 909782 | 🇺🇸 US 🇨🇦 CA | Heavy Duty Synthetic Blend SAE 15W-40 DIESEL2.5 Gallon | View on Amazon |
This table covers the engine oils listed by grade and specification for this engine. Typical signs include a low-oil lamp, knocking after a long interval, or oil that has gone thin and black well before the next service. Match the viscosity and spec in the notes (and on the filler cap). The tables group grades — they are not interchangeable.
VALVOLINE supplies the 5 Oil parts for the 2025 Isuzu NRR.
In the Full Synthetic grade, VALVOLINE supplies 1 part: full-synthetic oils. A representative part number is VALVOLINE 909772.
In the Heavy Duty / Diesel grade, VALVOLINE supplies 1 part: grouped under the catalog's "Heavy Duty / Diesel" designation — the notes column spells out what sets them apart. A representative part number is VALVOLINE 909778.
In the Synthetic Blend grade, VALVOLINE supplies 3 parts: synthetic-blend oils. A representative part number is VALVOLINE 909766.
Part numbers include VALVOLINE 909772, VALVOLINE 909778 and VALVOLINE 909766, among others listed above.
Oil Filter
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ECOGARD Fits: 5.2L L4 DIESEL Turbocharged | X11646 | 🇺🇸 US 🇨🇦 CA | Premium Oil FilterStandard | View on Amazon |
| VARIOUS MFR Fits: 6.6L V8 | PG2500 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HASTINGS / BALDWIN Fits: 5.2L L4 DIESEL Turbocharged | B40137 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| VARIOUS MFR Fits: 6.6L V8 | PG2500EX | 🇺🇸 US 🇨🇦 CA | Extended Life | View on Amazon |
| WIX Fits: 5.2L L4 DIESEL Turbocharged | WL10316 | 🇺🇸 US | View on Amazon |
This table covers the oil filters that screw onto this engine's filter mount. Typical signs include low oil pressure after a service, or a filter that will not spin off because the old gasket stayed on the block. Lube the new gasket and tighten to the spec on the box; a double-gasket install dumps the sump on the first drive.
5 Oil Filter parts are listed for the 2025 Isuzu NRR, from VARIOUS MFR, ECOGARD, HASTINGS / BALDWIN and 1 other brand.
In the Economy grade, ECOGARD and VARIOUS MFR supply 2 parts: the catalog's value-priced group. A representative part number is ECOGARD X11646.
The Standard Replacement section lists 3 options from HASTINGS / BALDWIN, VARIOUS MFR and WIX — built to original-equipment specification. HASTINGS / BALDWIN B40137 is listed in this group.
Listed part numbers: ECOGARD X11646, VARIOUS MFR PG2500 and HASTINGS / BALDWIN B40137, plus the other parts above.
Valve Cover Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO Fits: 6.6L V8 | VS50907R | 🇺🇸 US 🇨🇦 CA | Permadry RubberValve Cover Grommets Not Included | View on Amazon |
This table covers the gaskets that seal the valve cover to the cylinder head. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.
One part is listed for the 2025 Isuzu NRR — FEL-PRO VS50907R.
Valve Guide
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| QUALCAST Fits: 5.2L L4 DIESEL Turbocharged | 303297 | 🇺🇸 US 🇨🇦 CA | 2.245 OAL. 0.316 I.D. 0.553 O.D. OEM # 8973767191 | View on Amazon |
| QUALCAST Fits: 5.2L L4 DIESEL Turbocharged | 303101 | 🇺🇸 US 🇨🇦 CA | 2.245 OAL. 0.3150 I.D. 0.5526 O.D. OEM # 8943907800 | View on Amazon |
This table covers the pressed-in bronze and cast-iron guides that align valve stems. Typical signs include oil smoke on startup, a guide that has gone oval, or a valve that no longer seats quietly. Guides are a machine-shop fit. Confirm stem diameter in the notes before ordering.
QUALCAST supplies both parts for the 2025 Isuzu NRR.
This group includes QUALCAST 303297 and QUALCAST 303101.
Valve Seat
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| QUALCAST Fits: 5.2L L4 DIESEL Turbocharged | 2215021 | 🇺🇸 US 🇨🇦 CA | INSERT | View on Amazon |
| QUALCAST Fits: 5.2L L4 DIESEL Turbocharged | 2215022 | 🇺🇸 US 🇨🇦 CA | INSERT | View on Amazon |
This table covers the Valve seats.
2 Valve Seat parts for the 2025 Isuzu NRR come from QUALCAST.
This group includes QUALCAST 2215021 and QUALCAST 2215022.
Valve Stem Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| QUALCAST Fits: 5.2L L4 DIESEL Turbocharged | 3896245 | 🇺🇸 US 🇨🇦 CA | Viton Ring and Spring | View on Amazon |
| QUALCAST Fits: 5.2L L4 DIESEL Turbocharged | 38700255 | 🇺🇸 US 🇨🇦 CA | Viton Metal Clad. OEM # 8973767200 | View on Amazon |
This table covers the seals on each valve stem that control oil into the guides. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.
QUALCAST supplies both parts for the 2025 Isuzu NRR.
Listed part numbers: QUALCAST 3896245 and QUALCAST 38700255.
Buying Engine Parts for a 2025 Isuzu NRR
On this vehicle, the engine covers the internals and hard parts that build compression and keep oil where it belongs — gaskets, bearings, camshafts, lifters, seals and timing components.
- Match the engine first. Every engine 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 seals and gaskets for anything you open up; a timing job should always include the tensioner and guides, not just the belt or chain.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Oil and Oil Filter .
Frequently Asked Questions
How many engine parts fit the 2025 Isuzu NRR?
Our catalog currently lists 22 engine parts for the 2025 Isuzu NRR across 9 subcategories and 8 brands, covering all 3 engine options (5.2L L4 DIESEL Turbocharged, 6.6L V8 and ELECTRIC). Each part is matched to the engine(s) it fits.
Do engine parts differ between 2025 Isuzu NRR engines?
Yes. Every engine 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 engine problems on a 2025 Isuzu NRR?
Common symptoms include oil spots under the vehicle, blue or white exhaust smoke, ticking from the valvetrain, or coolant mysteriously disappearing. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What oil viscosity is listed for the 2025 Isuzu NRR?
Oil rows on this page include SAE 10W-30 and SAE 15W-40. Confirm the engine and the weight on the filler cap before you buy — high-mileage and standard fills can differ.
What should I replace at the same time?
Where labor overlaps, replace the seals and gaskets for anything you open up; a timing job should always include the tensioner and guides, not just the belt or chain.
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 2025 Isuzu NRR 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 2025 Isuzu NRR?
First match the engine — each row shows which engine(s) the part fits. Then engine hard parts are unforgiving of guesswork — confirm the casting or engine code before ordering, because one model year can hide two different blocks. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2025 Isuzu NRR
Engine Parts for Other Isuzu NRR Years
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