The 3.0-liter Isuzu 4JJ3 diesel engine has been assembled at a plant in Japan since 2019 and is installed in the popular MU-X SUV, D-Max pickup truck or similar Mazda BT-50. This power unit is essentially a seriously upgraded version of the 4JJ1 engine.
J-engine family: 4JB1, 4JX1, 4JG2, 4JJ1, 4JJ3.
Specifications
| Production years | since 2019 |
| Displacement, cc | 2999 |
| Fuel system | Common Rail |
| Power output, hp | 190 |
| Torque output, Nm | 450 |
| Cylinder block | cast iron R4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 95.4 |
| Piston stroke, mm | 104.9 |
| Compression ratio | 16.3 |
| Features | DOHC |
| Hydraulic lifters | no |
| Timing drive | chain and gears |
| Phase regulator | no |
| Turbocharging | IHI RHS4 |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 7.0 |
| Fuel type | diesel |
| Euro standards | EURO 5 |
| Fuel consumption, L/100 km (for Isuzu D-Max 2021) — city — highway — combined |
10.3 6.8 8.1 |
| Engine lifespan, km | ~500 000 |
| Weight, kg | 320 |
The engine was installed on:
- Isuzu D-Max 3 (RG) since 2019;
- Isuzu MU-X 2 (RJ) since 2020;
- Mazda BT-50 III (TF) since 2020.
Disadvantages of the Isuzu 4JJ3 engine
- On specialized forums, he is not particularly scolded and often complains only about vibration loading.
- The fuel system from Denso turned out to be quite demanding on the quality of diesel fuel.
- As always, a lot of trouble is caused by contamination of the particulate filter and the EGR valve.
- There are no hydraulic lifters here and periodically you need to adjust the valve clearance.
Frequently asked questions about the Isuzu 4JJ3
How much power does the Isuzu 4JJ3 make?
The Isuzu 4JJ3 develops 190 hp and 450 Nm of torque.
How much oil does the Isuzu 4JJ3 take and which one?
Engine oil capacity: 7.0 liters. Recommended oil: 5W-30.
Does the Isuzu 4JJ3 have a timing belt or chain?
Timing drive of the Isuzu 4JJ3: chain and gears.
Is the Isuzu 4JJ3 turbocharged?
Yes, the Isuzu 4JJ3 is turbocharged (IHI RHS4).
Does the Isuzu 4JJ3 need valve clearance adjustment?
Yes, there are no hydraulic lifters, so the valve clearances have to be checked and adjusted periodically.
How long does the Isuzu 4JJ3 last?
The typical lifespan of the Isuzu 4JJ3 is ~500 000 km with proper maintenance.
What is the fuel consumption of the Isuzu 4JJ3?
Isuzu D-Max 2021: city 10.3, highway 6.8, combined 8.1 L/100 km.
What cars was the Isuzu 4JJ3 installed on?
Isuzu D-Max 3 (RG) since 2019; Isuzu MU-X 2 (RJ) since 2020; Mazda BT-50 III (TF) since 2020.
What are the common problems of the Isuzu 4JJ3?
On specialized forums, he is not particularly scolded and often complains only about vibration loading. The fuel system from Denso turned out to be quite demanding on the quality of diesel fuel. All known problems.
does this engine run with an LNT?