Denso
Genuine Denso 4JJ1 DPF Injectors 295050-2420 | Isuzu D-MAX, MU-X 2017-2020 | Set of 4
Genuine Denso 4JJ1 DPF Injectors 295050-2420 | Isuzu D-MAX, MU-X 2017-2020 | Set of 4
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Set of 4 | Isuzu D-MAX and MU-X 3.0L 4JJ1-TC Hi-Power (Euro 5, DPF), 2017 to 2020
Brand new set of four genuine Denso 295050-2420 injectors, the factory injector for the Euro 5 4JJ1-TC Hi-Power that Isuzu built for Australia from 2017. This is the DPF engine with the 430Nm tune, the new pistons, the revised supply pump and the redesigned injectors. The straight OEM fix for a high-kilometre or faulty set: new outright, no exchange, no reconditioning, individual compensation codes on every injector.
Fitment
| Vehicle | Engine | Build dates | Code prefix |
|---|---|---|---|
| Isuzu D-MAX (RT, Euro 5 update) | 4JJ1-TC Hi-Power 3.0L, DPF | 02/2017 to 08/2020 | 9F |
| Isuzu MU-X (16.5MY on) | 4JJ1-TC Hi-Power 3.0L, DPF | 02/2017 to 2021 | 9F |
Quick check: the code on top of your injector starts with 9F. A code starting with 72 is the 2012 to 2016 pre-DPF engine and takes 095000-8340. 5F is 2006 to 2012 and takes 095000-6980. A9 is a 4JJ3 and takes 295700-1060. None of those are this part.
The Euro 5 engine went on sale in February 2017, so a late 2016 plated truck is almost always the earlier 72 code injector. Not sure? Add your VIN or State and Rego to the order notes and we will confirm before dispatch.
Part Numbers
| Denso | 295050-2420 alt. 295050-2540 |
| Isuzu / GM | 8-98317930-0, 8-97435554-0 |
| Compensation code | Begins with 9F, printed on the top of each injector |
| Supplied as | Full engine set of 4, brand new, genuine Denso |
What Else You Need for the Install
- Genuine 4JJ1 Injector Washer and O-Ring Kit. Seat washers are single-use crush seals. Fit new ones with every injector set.
- New injector-to-cover seals and leak-off clips while the cover is off.
Pro tip: never reuse the seat washers. A reused washer is the usual cause of injector rattle and blow-by on a fresh set.
Fitting and Coding Notes
- Enter each injector's 9F compensation code into the ECU in the correct cylinder position, then run the Isuzu injector learn procedure with a suitable scan tool.
- Clean the bores and seat faces, remove carbon, fit new seat washers, torque the clamp bolts to Isuzu specification.
- Clean-room practice. A single speck of grit in a common rail injector is enough to cause a misfire or a stuck needle.
- Installation by a qualified diesel technician recommended.
Want More Power?
For a tuned DPF 4JJ1 we build the same genuine Denso body with a +50% nozzle: 4JJ1 DPF +50 Injectors. Tune required.
Stock and Lead Time
Generally in stock and shipping same or next business day. If we are between shipments, allow 1 to 2 weeks. On a deadline? Message us before ordering and we will confirm.
Shipping and Payment
- Free insured express shipping Australia wide. Full tracking included.
- Buy now, pay later. Afterpay, Humm, Klarna and Zip.
- International shipping available. Message us for a quote.
Warranty and Fitment Disclaimer
Full manufacturer's warranty applies when fitted and coded by a qualified diesel technician. See our Refund, Returns and Warranty Policy.
It is the customer's responsibility to verify fitment before installation. Rego and VIN checks confirm what the vehicle left the factory with, which may not be correct if the fuel system has been changed.
Frequently Asked Questions
Q: Are these genuine or aftermarket?
A: Genuine Denso 295050-2420, brand new. Not remanufactured, not exchange, not a copy.
Q: Will these fit a 2016 D-MAX?
A: Almost certainly not. The Euro 5 DPF engine went on sale in February 2017. A 2016 build is the pre-DPF engine with 72 code injectors and takes 095000-8340. Check the code on your injector or send us your rego.
Q: Do I need to code them?
A: Yes. Each injector carries a 9F compensation code that must be entered into the ECU, followed by the injector learn procedure with a scan tool.
Q: Do they fit the MU-X?
A: Yes. The MU-X ran the same Euro 5 4JJ1-TC Hi-Power from early 2017 until the 4JJ3 model arrived in 2021.
Q: Do they come with seat washers?
A: No. Order the genuine 4JJ1 washer and O-ring kit alongside them. They are single-use.
Q: Are these the same as the 4JJ3 injector?
A: No. The 2020-on 4JJ3 uses 295700-1060 with an A9 code. Different engine, different injector.
Genuine Denso. 9F Coded. Straight Back to Factory.
Set of 4 for the Euro 5 DPF 4JJ1 D-MAX and MU-X, 2017 to 2020. Free express shipping Australia wide.
Disclaimer: Common Rail Cowboys is not affiliated with Isuzu Motors or Denso Corporation. Injectors should be fitted and coded by a competent diesel technician. Fitment verification is the buyer's responsibility.
