Also known as: 4ga3-3d, 4ga3-4d, 4da1-1, 4da1-2c, 4db2-1d1, 4k22d4t, d19tcid7, je493zlq6e, lj481q6, 4ga3, 4da1, 4db2, jac 4ga, 4da, 4db
JAC's own petrol and diesel fours — the 4GA petrol and the 4DA, 4DB and D19 diesels — in the T8 and the pickups and light lorries around it.
⚑ JAC's designations are the least standardised in this catalogue. One vehicle carries codes in at least four different schemes — 4GA3-4D, 4K22D4T, JE493ZLQ6E, LJ481Q6 — because several came in with acquired engine plants and were never harmonised. Searching the model rather than the code is unusually the better strategy here.
Several are licensed or derived designs rather than JAC's own from scratch, and their parts trails lead back to those origins — which is worth pursuing when JAC material runs out, as it does quickly outside China.
The diesels are conventional modern common-rail engines with the conventional items: an EGR valve that carbons shut, injector seals, and on emissions-controlled versions a particulate filter that short urban work will block. These are working vehicles, and the duty cycle is exactly the one that blocks a filter.
Documentation in English is essentially nonexistent, which is the practical constraint on all of them.
Cars fitted with this engine
2 generations, across 1 make. From the authored catalogue — an absent car means the catalogue has not reached it, not that the engine was never fitted.
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Posted about this engine
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Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.
What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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