An Overview of New Zealand Towing Rules and Regulations

Having the right towing equipment is just as important as understanding your vehicle’s limits. A towbar must be rated and matched to your vehicle’s tow rating and be properly installed. A light duty towbar may be fine for small trailers, but if you’re towing caravans, boats, or horse floats, you’ll need a heavy duty towbar properly matched to the unique combination of the towing vehicle, the trailer, and the towed load. Safety chains and couplings must also be in excellent condition and correctly attached.

Basic Set-up

• In New Zealand, there is no braking requirement for trailers up to 2000 kg load capacity or GVM (Gross Vehicle Mass). However, the law states that the tow vehicle and trailer must be able to stop safely within 7 metres from 30 km/h. For that reason, it is advisable for any trailer over 750 kg to be fitted with brakes.
• Trailers up to 2,500 kg without breakaway brakes must have one or two safety chains strong enough to prevent dragging if the coupling fails.
• Trailers between 2,500–3,500 kg must be fitted with an operational breakaway brake system.

Braking Systems

Braking systems are another critical component. In New Zealand:

• Trailers under 750 kg don’t need brakes, but as weights increase, so do the requirements.
• Trailers over 2,000 kg GVM need either override brakes or cab-controlled systems.
• Anything above 2,500 kg requires cab-controlled brakes, a breakaway system to stop the trailer if it becomes detached, and a reliable parking brake.

Breakaway systems should also be paired with a visible in-car battery monitor, so you always know the system is ready.

Trailer Safety and Visibility

• Every trailer must display a current WoF sticker, registration label, and license plate—with characters visible and the plate lit by a white light.
• Lighting requirements vary:
• Over 2.0 m wide: extra white front position lamps required.
• Over 1.5 m wide, registered after 1 Jan 1978: must have two tail lights.
• All trailers require working indicators and at least one red reflector per side.

Towing Mirrors

Don’t overlook towing mirrors. Standard mirrors often don’t provide enough visibility when pulling wide loads like caravans. Clip-on or extendable mirrors, such as the Hayman Reese Caravan Mirror, ensure you can see the trailer’s rear corners clearly, as required by law.

Brake Controller

• Between 2000–2500 kg GVM trailers must be braked on at least one axle via either override brakes (hydraulic tow coupling) or with cab-controlled brakes.
• Dual crossed safety chains or an electrically operated breakaway system is also required. Both coupling and chains are required to be rated and marked.
• Trailers with a GVM over 2500 kg up to 3500 kg need cab-controlled brakes (direct braking).
• These trailers are also required to have a breakaway system and a parking brake on at least one axle that can hold the trailer and load on a slope of 1-in-5 (approx. 20°).
  

Breakaway Systems

In the event of a disconnection from the tow vehicle, this system is designed to apply the electric trailer brakes for at least 15 minutes. Breakaway systems come in many shapes and sizes. An easy-to-use system like the Tekonsha Push-To-Test breakaway kit provides an LED monitoring system, showing when your battery is getting low.

Breakaway System Monitors

A breakaway monitor is also highly recommended. These monitors should be visible while you are driving and indicate, both visually and audibly, if your breakaway battery is at low charge or flat. The Hayman Reese SmartCheck system allows you to monitor up to 4 batteries without being intrusive in your dash. Plugging directly into your 12V socket, the wireless system is quick and easy to install.

Tip: Spend time ensuring that your towbar, trailer, trailer brakes, lighting, and accessories are correctly installed, suitable for your unique light towing setup, and that your trailer WoF is up to date.