Nissan Diesel

Nissan Navara NP300 Performance Tuning & Diesel Servicing

The Nissan Navara NP300 (D23) brought a smaller, harder-working engine to one of Australia’s most popular dual-cabs. The headline YS23DDTT 2.3-litre twin-turbo four-cylinder uses a sequential two-stage turbo arrangement and high-pressure common-rail injection to deliver 140kW and 450Nm, with peak torque landing low at 1500-2500rpm for genuine towing and load-carrying ability. A single-turbo version of the same block, the YS23DDT, makes 120kW and 403Nm and is found across more affordable grades.

Compared with the outgoing D40, which ran the larger 2.5-litre YD25DDTi (140kW/450Nm), the NP300 trades displacement for forced induction and tighter emissions hardware. That means a modern DPF, an EGR circuit and a thermal management system that all play a part in real-world reliability. The smaller twin-turbo engine responds extremely well to calibration work, but it also asks more of its owner when it comes to driving habits and servicing discipline.

At Willy’s Workshop we tune and service the NP300 from our Oxley (Brisbane) and Warana (Sunshine Coast) workshops. Every map is developed in-house on our dyno against the factory ECU, and every service is carried out by diesel specialists who know exactly where this platform builds carbon, when the timing chain needs attention, and how to keep the DPF regenerating the way Nissan intended.

Engines We Tune

Nissan Navara diesel engines we tune

YS23DDTT 2.3L twin-turbo (NP300 / D23, 2015 on)

140 kW / 450 Nm

Two-stage sequential twin-turbo with high-pressure common-rail injection; strong low-rev torque at 1500-2500rpm but watch DPF regen on short trips, EGR carbon and timing chain wear.

YS23DDT 2.3L single-turbo (NP300 / D23)

120 kW / 403 Nm

Single-turbo version of the 2.3 block in value grades; responds well to custom calibration while sharing the same DPF and EGR maintenance needs.

YD25DDTi 2.5L (outgoing D40, High Power)

140 kW / 450 Nm

Larger pre-NP300 2.5L diesel; proven workhorse prone to EGR carbon build-up and injector faults past 100,000km, well suited to specialist servicing.

Tuning & Servicing

Why choose Willy’s for your Nissan Navara

Performance Tuning

Custom, in-house, dyno-verified tuning for the YS23DDTT and YS23DDT twin- and single-turbo engines

Custom ECU calibration developed in-house on our dyno against your factory file, not a generic off-the-shelf flash, so the tune suits your exact engine, fuel and driving use.
Optimised fuelling, boost control and timing across the two-stage turbo system for stronger low-down torque, smoother throttle response and improved towing and overtaking confidence.
Sensible, reliability-first calibration that respects EGTs, rail pressure and the twin-turbo hardware, ideal for owners who tow vans, boats or trailers in Queensland conditions.
Before-and-after dyno verification with a full health check, so every NP300 leaves with measured, documented results rather than guesswork.

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Servicing & Repair

Specialist diesel servicing and repair for the common NP300 wear points

DPF diagnosis, forced regeneration and cleaning, including the short-trip and low-speed driving patterns that prevent the NP300 from completing active regen.
EGR inspection, cleaning and carbon removal across the intake and valve, the build-up that causes rough idle, lost power and black smoke as kilometres climb.
Timing chain assessment and replacement, a known wear item on the YS23 engine, plus injector testing for leak-down and balance faults.
Full logbook-style servicing, turbo and oil-system checks for early signs of seal wear or oil ingestion, and fault-code diagnostics on Nissan-specific systems.

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The Difference

Why drivers trust Willy’s Workshop

In-house ECU tuning

Custom maps written on your factory ECU — never generic off-the-shelf files

Dyno-verified

Every result measured before & after on our in-house dyno

Dealer-grade tooling

Genuine OEM software and diagnostics, not guesswork

Warranty-conscious

Logbook servicing kept up to date with manufacturer schedules

Two QLD workshops

Oxley (Brisbane) & Warana (Sunshine Coast)

Nissan diesel performance tuning & servicing at Willys Workshop

FAQ

Nissan Navara diesel FAQs

How much does NP300 tuning cost and is it worth it?

Because every tune is custom-developed on our dyno, pricing depends on whether you want a tune alone or combined with supporting work like a DPF clean or service. The NP300’s twin-turbo engine responds very well to proper calibration, so most owners notice stronger low-rev torque, smoother response and better towing manners. We give you a firm quote up front after discussing how you use the vehicle.

Will tuning my Navara NP300 void my Nissan warranty?

If your vehicle is still under factory warranty, any modification to the ECU can affect warranty cover on related components. We talk this through honestly before any work begins, and we can return the vehicle to its factory file if you need to present it for a dealer claim. Many of our NP300 customers are out of warranty and tune with full confidence.

What can you do about the DPF, EGR and emissions systems, and is it legal?

We diagnose, clean and repair the factory DPF and EGR so they work the way Nissan designed them, including forced regens and carbon removal. We keep emissions hardware functional and your vehicle road-legal. The most common NP300 DPF complaint is short-trip driving that never lets the filter complete a regen, and we can advise on driving habits and servicing to prevent it recurring.

What power gains can I expect from the YS23DDTT?

Gains vary with the specific engine, its condition and the fuel used, which is exactly why we verify every result on the dyno rather than quote a fixed number. The twin-turbo YS23DDTT (140kW/450Nm factory) typically gives a worthwhile lift in torque and drivability when calibrated properly, with the focus on usable, reliable low-to-mid-range performance for towing and loaded driving.

Which NP300 engines and years do you tune and service?

We cover the NP300 / D23 from 2015 onwards, including the YS23DDTT 2.3-litre twin-turbo (140kW/450Nm) and the YS23DDT single-turbo (120kW/403Nm). We also service the outgoing D40 Navara with the 2.5-litre YD25DDTi (140kW/450Nm), which shares many of the same diesel maintenance needs around EGR carbon and injectors.

How do I book and how long does it take?

Call our Oxley (Brisbane) or Warana (Sunshine Coast) workshop or book online and tell us how you use your Navara. A custom dyno tune is generally a one-day job; servicing and DPF or EGR work depends on condition and is quoted before we start. We’ll confirm timing when you book so you can plan around it.

Two Queensland Locations