Services
ADAS Calibration for Lifted Vehicles
When you lift or modify a modern 4x4, the factory Advanced Driver Assistance Systems (ADAS) — such as lane-keep assist, adaptive cruise control, and emergency braking — can be thrown out of alignment.
At AJF 4x4, we offer specialist ADAS calibration to ensure these systems function safely and accurately after your suspension lift or modification.
Our team works closely with certifiers to make the calibration and LVV certification process smooth and hassle-free, keeping your vehicle road-legal, safe, and compliant.
DPF & EGR Solutions – Rotorua & NZ Wide
Modern diesel vehicles are fitted with Diesel Particulate Filters (DPF) and Exhaust Gas Recirculation (EGR) systems to meet strict emissions standards. While these systems are vital for compliance, they can often lead to performance issues, expensive maintenance, or even limp-mode problems when they fail.
At AJF 4x4, we provide specialist DPF and EGR services to keep your diesel vehicle running at its best while staying compliant with New Zealand certification rules.
Our services include:
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DPF removals with full certification support – essential for keeping your vehicle road-legal in NZ.
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EGR off and physical removals, improving airflow and reliability while reducing carbon build-up.
Whether you’re in Rotorua or anywhere across New Zealand, our team works closely with certifiers to ensure all work is completed safely, professionally, and within NZ regulations, giving you peace of mind and a better-performing, more reliable diesel vehicle.
ECU Remapping – Diesel Power Tune
Unlock your vehicle’s full potential with a professional ECU remap, tailored specifically to your engine and driving needs.
At AJF 4x4, we partner with Diesel Power Tune, a trusted leader in ECU tuning technology, to deliver safe, reliable, and high-performance remapping solutions. Whether you want more power for towing, improved fuel efficiency, or to disable problematic factory settings, we’ve got you covered.
Our ECU remapping services include:
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Performance tuning to increase horsepower and torque while maintaining engine safety.
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DPF/EGR delete tuning for vehicles undergoing certified DPF or EGR removal.
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Custom remaps tailored to your modifications, such as snorkels, exhaust upgrades, or larger turbos.
While the tuning itself is not carried out on a dyno, all Diesel Power Tune maps are developed and proven on dynos to ensure safe and consistent results. This allows us to provide reliable performance gains without the added cost and time of live dyno tuning.
Every tune is completed using state-of-the-art equipment and with full consideration of New Zealand certification rules, ensuring your vehicle remains safe, legal, and reliable.
LVV Certification + VTNZ WOF
When modifying your 4x4 with upgrades such as lift kits, suspension changes, engine swaps, custom fabrication, or DPF/EGR removals, a Low Volume Vehicle (LVV) certification is required to keep your vehicle legal and compliant under New Zealand law.
At AJF 4x4, we make this process simple and hassle-free with our drive-in, drive-out service. We handle everything from start to finish, including:
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Arranging and managing the LVV certification inspection.
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Completing any required remedial work, such as fitting flares, mudflaps, or sway bar adjustments.
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Coordinating directly with certifiers to ensure a smooth approval process.
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Booking and completing your VTNZ Warrant of Fitness (WOF) once certification is signed off.
Our goal is to save you the time and stress of dealing with multiple workshops and certifiers. Just bring your vehicle to us, and we’ll return it fully certified, road-legal, and ready to hit the road or trails.
With years of experience in certification preparation, our team understands exactly what certifiers are looking for and ensures every job is done to the highest standard, helping you avoid delays and extra costs.
