Brand-new engine foundation · 3.0L turbo diesel
4JJ3 crate engine for sale.
Get the right replacement.
A new 4JJ3-TCX replacement for selected Isuzu D-Max RG and second-generation MU-X RJ models. Confirm your engine configuration, then plan the complete fitting job with your workshop.
Confirm the complete 4JJ3-TCX code. The application guide begins at 2020 for D-Max RG and 2021 for MU-X RJ. Check drivetrain, transmission and emissions equipment. Earlier 4JJ1, 4JH1 and smaller RZ4E/RZ4F engines are separate applications.
01 / Confirm the configuration
Match your 4JJ3-TCX before ordering.
Confirm the complete 4JJ3-TCX code. The application guide begins at 2020 for D-Max RG and 2021 for MU-X RJ. Check drivetrain, transmission and emissions equipment. Earlier 4JJ1, 4JH1 and smaller RZ4E/RZ4F engines are separate applications.
| Check | What to confirm |
|---|---|
| Vehicle application | selected Isuzu D-Max RG and second-generation MU-X RJ models; advertised D-Max 2020-on; MU-X 2021-on range. Build year alone does not confirm fitment. |
| Engine version | Confirm the complete 4JJ3-TCX code. The application guide begins at 2020 for D-Max RG and 2021 for MU-X RJ. Check drivetrain, transmission and emissions equipment. Earlier 4JJ1, 4JH1 and smaller RZ4E/RZ4F engines are separate applications. |
| Installation interfaces | Compare sump clearance, engine mounts, manifolds, sensors and wiring. Confirm flywheel or driveplate compatibility with the transmission. |
| Order confirmation | Send the VIN or chassis number, build date, engine-code photo and clear pictures of the original assembly. |
Fitment first: have your mechanic confirm the original configuration before you order or book installation.
02 / Plan the complete job
The engine and the transfer work.
Supplied engine assembly
Brand-new 4JJ3-TCX 3.0L turbo diesel bare engine / long motor. Confirm the final timing, cover and sump inclusions in the written supply specification. External accessories require transfer from the original engine.
Brand-new supply. No core exchange required.
Installer’s transfer checklist
Transfer the required serviceable turbocharger, high-pressure fuel pump, injectors, rail, manifolds, emissions equipment, wiring, sensors and vehicle-specific accessories. Confirm mounts, sump and transmission interfaces against the original engine.
Photographs show the assembly from different angles. The confirmed written supply specification determines what is included; check any component you need before placing the order.
03 / A closer look
Your 4JJ3-TCX replacement, in detail.
Confirm the engine version
Confirm the complete 4JJ3-TCX code. The application guide begins at 2020 for D-Max RG and 2021 for MU-X RJ. Check drivetrain, transmission and emissions equipment. Earlier 4JJ1, 4JH1 and smaller RZ4E/RZ4F engines are separate applications.
Understand the supply
Brand-new 4JJ3-TCX 3.0L turbo diesel bare engine / long motor. Confirm the final timing, cover and sump inclusions in the written supply specification. External accessories require transfer from the original engine.
Inspect transferred equipment
Transfer the required serviceable turbocharger, high-pressure fuel pump, injectors, rail, manifolds, emissions equipment, wiring, sensors and vehicle-specific accessories. Confirm mounts, sump and transmission interfaces against the original engine.
Compare the repair options
Compare the complete installed cost.
| Option | Questions for your workshop |
|---|---|
| Brand-new engine assembly | Confirm the supply list and quote separately for labour, fluids, filters and any external components needing replacement. |
| Used engine | Ask for service history, condition evidence and written cover. Check which accessories are included and their condition. |
| Rebuild the original | Establish the extent of damage, machining requirements, parts availability and total repair time before comparing quotes. |
04 / Installation planning
Resolve the cause. Prepare the replacement.
Diagnose the original failure and inspect the cooling, lubrication and fuel systems before fitting. Remove contamination from reused parts. Follow the applicable workshop procedure for priming, first start and any required relearn checks. Diesel engines are not hot-tested. The installer must check and adjust valve clearances at initial installation to the specification for the exact engine.
Diagnose the original fault
Oil consumption, smoke, low power or overheating need diagnosis. Confirm whether the engine assembly or external equipment caused the problem.
Use the correct procedure
Have a qualified mechanic follow the supplied fitting instructions and the service procedure for the exact engine variant.
Record commissioning
Follow the supplied run-in and servicing schedule. Retain installation invoices and records of checks, fluids and servicing.
See the business behind your engine
Step inside our warehouse.
Take a look around and see our engine stock and delivery crates for yourself. When you buy a brand-new Isuzu D-Max / MU-X long motor, there is an Australian team here to help with your engine specification, supply details and replacement planning.
Free standard Australian delivery and a 1-year limited warranty are included under our published terms.
05 / Delivery & peace of mind
From our warehouse.
To your next chapter.
Free standard Australian freight. Tracked delivery. A local team behind your Isuzu D-Max / MU-X.
Delivered Australia-wide.
delivery
For an available engine, allow 1–2 business days for preparation. Confirm the current supply lead time before booking installation. Delivery estimates vary by location and carrier conditions; remote areas may take longer.
Local support. Written cover.
limited warranty
Cover starts when your engine is delivered.
Built around manufacturing quality
Cover for defects in materials and workmanship, including manufacturing faults in the block, head and internal components, subject to the policy.
Coverage & installation essentials
Professional installation and correct run-in are required. The policy excludes normal wear, improper installation, neglect, overheating, lack of lubrication and consequential costs. Read the full terms before installation.
Easy returns
7 days to arrange your return.
Contact us within 7 calendar days of confirmed delivery for an eligible non-warranty return. The engine must be unused, uninstalled and unaltered, with its original packaging intact.
The restocking fee applies to the engine purchase price. You pay return freight, and original shipping costs are deducted from the refund. Returns are inspected before refund approval. Warranty claims follow the separate warranty process.
How delivery works
- Order confirmedYour confirmation arrives by email.
- Prepared in QLDYour engine is packed for freight.
- Track to your doorTracking is emailed at dispatch.
If you need warranty support
- Contact our teamTell us about the issue promptly.
- Guided assessmentWe may request photos or diagnostic reports.
- Next steps agreedIf approved, we arrange inspection and repair or replacement instructions.
06 / Before you buy
Isuzu D-Max / MU-X engine replacement FAQs
Is this a new 4JJ3-TCX engine?
Yes. This listing supplies a brand-new replacement engine assembly. You do not need to exchange your old engine.
Will it fit every Isuzu D-Max / MU-X?
Confirm the complete 4JJ3-TCX code. The application guide begins at 2020 for D-Max RG and 2021 for MU-X RJ. Check drivetrain, transmission and emissions equipment. Earlier 4JJ1, 4JH1 and smaller RZ4E/RZ4F engines are separate applications. The D-Max 2020-on; MU-X 2021-on range is a guide; confirm the engine and build details before ordering.
What is supplied?
Brand-new 4JJ3-TCX 3.0L turbo diesel bare engine / long motor. Confirm the final timing, cover and sump inclusions in the written supply specification. External accessories require transfer from the original engine. Transfer the required serviceable turbocharger, high-pressure fuel pump, injectors, rail, manifolds, emissions equipment, wiring, sensors and vehicle-specific accessories. Confirm mounts, sump and transmission interfaces against the original engine.
How much will the complete replacement cost?
Use the current engine price above as the supply starting point. Ask your workshop to quote labour, consumables and any extra parts after diagnosing the original fault.
Does the warranty include labour?
The included one-year warranty is product cover, not installation labour cover. Read the published terms and fitting requirements before installation.
When should I book my mechanic?
Confirm stock or backorder timing and delivery to your postcode first. Allow preparation time before dispatch and agree the fitting date once arrival timing is clear.
Plan your replacement
Ready for the next step?
Let’s match your Isuzu D-Max / MU-X engine.
Send vehicle details and engine photos. We’ll help confirm the configuration, supply list and current lead time.
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