Towing Mirrors and ADR Rear-Vision Compliance for the 70 Series

Tow a wide van behind your Toyota LandCruiser 70 Series and your factory mirrors stop showing you the lane behind. Here's the rear-vision requirement that applies once you hitch up, and how the mirror styles compare. You'll find the intent of ADR 14 (Rear Vision Mirrors), the road rule that requires a clear view to the rear and sides while towing, the choice between clamp-on, replacement and slip-on mirrors, electric against manual adjustment, what integrated indicators and cameras do for you, and what an inspector looks at. It's general guidance if you own a 76 Wagon, 78 Troop Carrier or 79 Cab Chassis. Confirm the exact rule and penalty with the road authority in your state or territory.

ADR 14 and what rear vision is for

ADR 14 (Rear Vision Mirrors) sets out the rear vision a vehicle must provide as it was originally manufactured. It specifies that a vehicle must be fitted with mirrors that give the driver a clear and reasonably unobstructed view to the rear and along both sides of the vehicle. On a 70 Series that's met at manufacture by the standard door mirrors, sized and positioned for the width of the vehicle itself.

The key words are "the vehicle". Your factory mirrors are engineered to see down the sides of a 70 Series body. They aren't engineered to see down the sides of a caravan or a wide trailer that's significantly broader than the tow vehicle. Once the load behind you is wider than your 70 Series, the standard mirrors look straight at the side of the trailer and the lane behind it disappears. The rear vision the vehicle was built with no longer suits the combination you're driving.

Towing mirrors close that gap. They aren't a styling change. They restore the rear and side vision ADR 14 intends a road vehicle to provide, across the wider footprint of a tow vehicle and trailer travelling as one combination.

When you need towing mirrors

Width is the trigger. Road rules in every Australian state and territory require you to have a clear view of the road and of traffic to the rear and sides. Where a load or trailer obstructs the view available from your standard mirrors, you must fit additional or extended mirrors so the required view is restored. Road authorities work to a common rule of thumb: if the trailer or load is wider than the towing vehicle, or otherwise obstructs rear vision, you need suitable towing mirrors.

On a 70 Series that comes up often. If you're towing behind a 79 Series Cab Chassis, the body is relatively narrow, and most caravans, large box trailers, wide boats and machinery floats sit wider than it does. Your standard mirrors then see only the side of the load. Towing mirrors push the line of sight outward so you can see past the width of the trailer to the lane and the traffic behind.

The requirement isn't a fixed measurement that applies the same way everywhere, so confirm the wording with your state or territory road authority. The principle holds across the country and you can apply it without much trouble.

You only need towing mirrors while you're actually towing the wide load. Plenty of designs you fit and pull off for each trip, and others stay on permanently. How often you tow decides which suits you.

Clamp-on, replacement and slip-on mirrors

You've got three broad ways to add towing vision to a 70 Series. Each restores rear and side vision. What separates them is how they attach, how secure they stay, and how easy they are to live with day to day.

Clamp-on towing mirrors

Clamp-on mirrors attach to your existing door mirror with straps, clamps or a frame that grips the factory housing. You fit them before a trip and take them off afterwards, which suits you if you tow occasionally and don't want extended mirrors on the vehicle the rest of the time. The trade-off: they rely on a clamp holding firm against vibration, they can mark or load your factory mirror, and you have to set them up correctly each trip or they'll sag and buzz at highway speed.

Replacement towing mirrors

Replacement mirrors take the factory door mirror off entirely and bolt a purpose-built towing mirror in its place. They're the most rigid and the most integrated option. Many use extendable or telescopic arms, so you push the glass out for towing and pull it back in for everyday driving, and they can carry electric adjustment, heating, indicators and cameras. Most permanent solution, most stable at speed, and you give up the original mirror to get there.

Slip-on towing mirrors

Slip-on mirrors fit over the top of your existing mirror housing and sit there, using the factory mirror as a base. No tools, quick on and quick off, which is handy if you tow rarely. They lean on the original mirror for support and positioning, so you get the least rigid of the three and the most prone to vibration. Check the view and confirm the fit before each trip.

Electric against manual adjustment

You can get towing mirrors with manual or electric adjustment. The difference bites hardest on the driver's-side mirror, the one you can't reach and the one that needs fine adjustment on the move.

Manual mirrors you adjust by hand at the glass. Fewer parts to fail, no wiring into the vehicle, simpler all round. The drawback is that setting the far side or a high-mounted glass means you stop or reach awkwardly. Electric mirrors work off a switch in the cabin, so you can fine-tune both mirrors from the driver's seat. Go replacement-style and you're most likely to get electric adjustment, often with heating to clear fog and rain as well. Electric adjustment and heating need the mirror wired into the vehicle, which is an extra installation step and a manageable one for a workshop.

Neither manual nor electric is more or less compliant. The rear-vision requirement is about the view the mirror gives you, not how you aim it. The more you tow, and the more you want a precise, repeatable view, the more an electric heated replacement mirror earns its place.

Integrated indicators and cameras

Some towing mirrors, replacement-style units in particular, build indicator repeaters into the housing and make provision for a side or reversing camera. Those features add capability, and you take on their compliance considerations with them.

An integrated indicator repeater must function correctly and must not be misleading. If your mirror includes an indicator, it should flash amber in time with the vehicle's other indicators, and it must be wired so it works as part of the existing signalling rather than as an unrelated lamp. A camera built into or mounted on the mirror is treated the way any reversing or side camera is treated. It helps you, it doesn't replace the mirror. Under ADR 14 the vehicle must still be fitted with compliant mirrors that provide the required rear and side view; a camera supplements that view, it doesn't substitute for it. You can watch a camera display while moving as a driver aid, the same as a reversing camera, and the physical mirrors still have to meet the requirement.

ADR and rule references for towing mirrors

Fit towing mirrors to a 70 Series and these are the references that matter: ADR 14 sets the rear-vision standard, and the rest are the in-use rules and related construction points. Where a specific point falls outside them, your state roadworthy requirements and a licensed automotive engineer remain the authority on whether a particular mirror or installation is acceptable.

Roadworthy and inspection

• Security: The mirror must hold its position against vibration and wind at highway speed. Check a clamp-on or slip-on mirror for tightness before every trip, and bolt a replacement mirror up to the correct torque.
• View: Each mirror must give a usable view down the side of the trailer to the lane and traffic behind. A mirror that only shows the side of the van isn't doing its job.
• Condition: Glass must be intact and clear, and any integrated indicator must function correctly. A damaged mirror or a non-working indicator can fail inspection.
• Everyday use: Extendable mirrors pushed out for towing may sit wider than permitted for ordinary driving, so retract them when you're not towing and confirm the in-use width rules with your state authority.

An inspector wants the required view, a secure mount, and sound glass and housing. Leave a towing mirror loose on its clamp, let it buzz or sag at speed, run cracked or missing glass, or pull a mirror off while a wide trailer is still attached: each of those can be treated as a defect.

Whether a fitment needs engineering certification depends on your state and on the nature of the installation. A bolt-in replacement mirror that substitutes for the factory mirror is generally straightforward, while anything that alters wiring or vehicle width may warrant a check. See how the design rules and state schemes fit together, then confirm your specific situation with a licensed automotive engineer and your road authority.

Set up the 70 Series cabin around towing

Towing mirrors are one part of a 70 Series towing setup. Plenty of owners pair the mirror upgrade with a headunit that takes a reversing or side camera feed, so the dash shows the camera image as a driver aid alongside the restored mirror view. A vehicle-specific headunit keeps that camera input integrated and keeps your factory steering controls working, which suits the hard use your 70 Series sees as a tow vehicle. Better cabin audio helps too on long highway tows, where road and trailer noise never stops. You're adding those as complementary upgrades. The mirror is still the item that satisfies the rear-vision requirement.

If you're unsure whether your trailer or van makes towing mirrors mandatory for your combination, sit in the driver's seat with the trailer attached and assess the view. If you can't see clearly down both sides to the traffic behind, you need extended mirrors for that trip.

Related guides

• ADR Compliance overview, how the Australian Design Rules and state roadworthy schemes fit together.
• LandCruiser 70 Series headunits, vehicle-specific units that integrate reversing and side cameras and retain factory steering controls.
• Car audio, speakers and audio upgrades for long highway tows.

Between them you get the wider framework of Australian Design Rules for modifications to your 70 Series, plus the cabin upgrades that suit a towing setup.

Common questions