Not every family drives a modern car. Inherited vehicles, classics, work trucks, cheap second cars and grandparents' well-preserved saloons all turn up in the school run, and the advice written for a current model year does not always apply.
The reassuring part first: a correctly done seat belt installation is as safe as a lower anchor installation. Lower anchors were introduced to make correct installation easier, not to make it safer. An older vehicle is not automatically a problem.
What changed and when
- Lower anchors became a requirement in US passenger vehicles in the early 2000s. Vehicles older than that generally have none.
- Top tether anchors were phased in slightly earlier for forward-facing use, but coverage in older vehicles is patchy and often limited to certain positions.
- Locking retractors. From the mid-1990s most vehicle belts gained a mode that lets them lock for child restraint use. Older belts often do not.
- Lap-only belts in rear centre positions persisted for a long time and are still found in many older vehicles.
Making the belt lock
A child restraint needs the belt to hold it tightly and stay tight. A belt that free-spools will let the seat move.
Test yours: pull the shoulder belt all the way out to the end of its travel, then let it retract slowly. If you hear ratcheting and the belt will not pull back out freely, it has switched into a locking mode and you can install with it.
If it does not lock that way, check for a switch on the buckle or latch plate — some belts have a locking latch plate that grips the webbing. If neither applies, you need a locking clip.
Locking clip
$ Vehicles with non-locking belts
A flat metal H-shaped clip supplied with most car seats, used to hold the lap and shoulder portions of a non-locking belt together so the lap portion cannot loosen. If yours has gone missing, replacements are inexpensive. Fitting position is specified in your car seat manual and it matters — roughly an inch from the latch plate.
Locking clips must be positioned exactly as your car seat manual describes. Fitted wrongly they do nothing. This is a genuinely good reason to book a seat check rather than working from a diagram, because it is easy to be confident and wrong.
Tether anchors in older vehicles
Forward-facing harnessed seats should use a top tether. Many older vehicles have no factory tether anchor, and some have anchor points that require a retrofit kit.
What to do:
- Check the vehicle manual for designated tether anchor locations. They are sometimes present but unmarked, behind a trim cover, on the parcel shelf, the seat back or the floor.
- Contact a dealer about a retrofit kit for your model. Manufacturers have often produced them, and they are sometimes supplied free.
- If no anchor exists and none can be fitted, that position cannot take a forward-facing harnessed seat. Rear-facing does not require a tether in most configurations, which is one more reason to rear-face longer.
Never improvise. A cargo hook, a seat frame bolt or a luggage tie-down is not a tether anchor.
Lap-only belts
A lap-only belt can secure a harnessed car seat if your seat's manual permits lap-belt installation, which most do. It cannot be used with a booster, because a booster works by positioning a shoulder belt that is not there.
If the only available position for an older child has a lap-only belt, options are a harnessed seat with a high weight limit, a certified travel vest if the configuration permits, or a different seating position.
Airbags and older cars
- Rear-facing seats must never go in front of an active airbag.
- Some older vehicles have no rear seat at all — pickups, two-seat sports cars, some classics. Where a child must ride in front, the passenger airbag must be switched off using a manufacturer-fitted switch, and the seat moved as far back as it goes.
- Not every vehicle has a switch. Where it does not, that vehicle cannot carry a rear-facing child.
- Older vehicles predating airbags entirely have their own considerations, and the vehicle manual is again the authority.
Classic and collector cars
Genuinely old vehicles may have lap belts retrofitted, or no belts at all. Points worth knowing:
- Retrofitted belts are only as good as their anchorage. Belts bolted into unreinforced sheet metal are not a restraint anchorage.
- A vehicle with no belts cannot carry a child restraint.
- Older cars lack crumple zones, side impact structures and modern occupant protection generally. That is a reason to be conservative about carrying children in them at all, not just about the seat.
For an occasional-use classic, the honest answer is often to take a different car. The restraint is only one part of the protection system, and the rest of the system is what it was in 1972.
The checks, whatever the vehicle
- Under one inch of movement at the belt path.
- Belt routed through the correct path for the seat's direction.
- Belt locked, or a locking clip fitted correctly.
- Correct recline angle on the seat's own indicator.
- Top tether attached to a designated anchor for forward-facing.
- Harness at the correct height, chest clip at armpit level, no pinchable slack.
Older vehicles are the single best reason to get a check. Technicians know which models have hidden anchors, which need clips, and which retrofits exist. Finding a technician.