Car Seat Fitting FAQ

❓ Car Seat Fitting FAQ

Straight answers from an ACRI-accredited fitter — no myths, no upselling.

🔧 Installation Basics

Should the baby car seat move?
＋
A common guideline is that the restraint shouldn’t move more than 2.5cm. At the other extreme, the installation shouldn’t be rock hard either — that removes the seat belt webbing’s elasticity and can transfer more energy to your child in a crash. Many parents use the “wiggle wobble” test, pushing repeatedly at the extreme endpoint of the restraint — but this actually damages the installation and loosens the fitment. The correct technique is to test stability at the seat belt installation path instead. If you’re in doubt, consult with us for guidance.
Does the car seat installation need to be rock hard?
＋
Many parents believe it does — some fitters even claim no one can install it firmer than them. Fact: it doesn’t need to be rock hard. Making it rock hard actually compromises the installation and your child’s safety, because a rock-hard seat belt can no longer absorb energy from an emergency stop. A good installer will explain this to you rather than chase maximum firmness.
How tight should the harness be?
＋
Many parents know the two-finger test, but most execute it incorrectly — it should be done at the collarbone with no padding in the way, and it’s genuinely difficult to do on a newborn. A better test is the pinch test: if you can easily pinch a fold of the harness with one hand, it’s still too loose.
Why do I need a towel under my car seat?
＋
Cars are designed to keep adults safe — sports cars and larger-engine cars often have deeply bucketed seats to stop an adult sliding forward under braking. Unfortunately, many vehicle seats don’t provide a suitable angle for a rear-facing baby car seat, causing head flop from deep bucket seats sitting the restraint too upright. Many fitters use a towel to correct the back angle and help avoid head flop. Infa Secure also make a foam roller specifically designed to fix this issue on deep, bucketed seats.
When should I install my baby car seat?
＋
At least 4 weeks before your due date — this gives you enough time to get comfortable using the restraint before your baby arrives. Don’t bother with a baby shop fitting or a motor mechanic; choose an experienced ACRI-accredited car seat fitter in Melbourne instead.

↩️ Rear-Facing & Turning Around

Can my 6-month-old be turned forward-facing?
＋
Legally you can — the law only requires rear-facing until 6 months — but best practice from manufacturers is to stay rear-facing until your child reaches the first shoulder height marker, typically 12 to 14 months. If your seat is tested for extended rear-facing, best practice is to stay rear-facing as long as possible, up to the extended rear-facing height marker.
When should I turn my baby’s car seat around?
＋
Best practice is to keep children rear-facing for as long as possible. Most convertible seats (birth to 4 years) are classified A2/B or A4/B. An A2/B has 2 shoulder height markers and keeps an average child rear-facing for around 12–14 months. An A4/B has 3 markers: the lowest is the minimum torso length before turning around (average 12–14 months), the middle is the extended rear-facing marker (average 30 months for Britax and Infa Secure), and once your child reaches it, they must be turned forward-facing. Regardless of the age range manufacturers quote, it’s the seat’s own maximum size indicators that actually determine when a child has outgrown the restraint.
What are shoulder height markers?
＋

Since AS1754:2010 was approved, shoulder height markers have been added to all child restraints. They make it easier for parents and carers to determine if a seat still suits their child, and when it’s time to move to the next type of restraint or mode (e.g. rear-facing to forward-facing).

Related guides:

📋 Note: this “Untethered Booster Height Markers” link uses the slug untethered-booster-seats — the file built earlier this session used untethered-booster-seats-guide (with “-guide”). Worth confirming which is the actual live URL.

🪑 Restraint Types

Is an extended harnessing (Type G) seat safer?
＋

What is extended harnessing? The child stays in a 6-point harness until they reach a torso length of 51cm. A 6-point harness is much safer than a standard lap-sash belt — it’s the same reason racing drivers use a 5- or 6-point harness. It was introduced because many parents were moving children into boosters prematurely: old enough (around 4) but not tall enough for the sash to sit correctly across the shoulder instead of near the neck.

Three things to look for in a good extended harnessing seat:

  1. A hassle-free harness (no manual re-threading needed)
  2. Easy one-handed harness adjustment
  3. A good recline angle, to help children sleep without head flop

Seats that meet this criteria include the Maxi Guard, Maxi Guard Pro (around $120 more, with thermo fabric), Infa Grandeur (also an A4 rear-facing restraint), and Infa Evolve.

In this fitter’s opinion, the Maxi Cosi Luna doesn’t meet this criteria, and isn’t as good value as the alternatives above.

Boosters vs. extended harnessing — which is safer?
＋
Extended harnessing is safer. A booster requires the correct age and height before it’s suitable, while an extended harnessing seat can be used immediately once forward-facing — no need to wait until age 4. It also keeps the benefit of a 6-point harness throughout.
Baby capsule or convertible car seat?
＋
Many parents prefer a capsule for the first six months — the benefit is not disturbing your baby’s sleep when transitioning from car to pram. Another great advantage: all you need is a second base in the grandparents’ car, making it much easier if they need to pick up your child in an emergency.
📋 Your source’s pricing here was garbled (“half the cost of the capsule couple of months”) — I’ve used the clearer $65-for-a-couple-of-months figure used elsewhere on your site instead; please confirm this matches.
Hiring a second base costs approximately $65 for a couple of months, compared to several hundred dollars for a second convertible car seat. A capsule should ideally go on the passenger side — the narrow centre position and the split in the back seat can make a centre installation unsafe, since the upper tether may fall between the split.
Can I use a seat belt extender?
＋
It’s not recommended — seat belt extenders haven’t been tested with child restraints, and introduce another possible point of failure. A better solution is an extended harnessing Type G restraint (like the Britax Maxi Guard or Infa Evolve Origin), which keeps your child in the harness until approximately 8 years of age.
Do booster seats need to be anchored?
＋
Booster seats can be tethered or untethered. An untethered booster (sometimes called a “sometimes booster”) weighs under 2kg and isn’t intended for everyday use — it offers limited protection. A tethered booster offers real safety features: an adjustable headrest, anti-submarining protection, side protection, and sash guides to keep the belt across the collarbone.
Can Latch be used in Australia?
＋
No. LATCH (Lower Anchors and Tethers for Children) is an attachment system used in the American market and isn’t approved for use in Australia. Australian car seats use the tether strap combined with either Isofix or a seat belt for lateral stability.

🚗 Special Situations

Can I put a baby seat in a ute?
＋
In a single-cab ute with only one row of seats, children may travel in the front row provided they use an approved child restraint or booster seat. A rear-facing baby car seat, however, cannot be used in the front row of any car or ute.
Where do you put multiple car seats?
＋

Many websites claim the middle seat is safest, being away from airbags and doors in a side impact. But with more than one child, that immediately raises the question: which is your favourite child?

The genuinely safest position is wherever the seat can actually be installed best, and adjusted and maintained correctly.

In Australia, you’re more likely to be rear-ended — and in the middle seat, if your child has slipped their arms out of the harness, there’s nothing stopping them going through the windscreen.
📋 The “more likely to be rear-ended” claim has no citation in your source — this is genuinely a commonly-cited road safety point, but worth adding a real source if you have one, consistent with how we’ve handled other stats this session.

Can I put two car seats on one anchor point?
＋
In nearly every car, each car seat must have its own anchor point. There are special circumstances and vehicles where a single anchor point is used for two seats, but for the vast majority of passenger vehicles, each seat needs its own dedicated anchor point.

🛠️ Choosing a Fitter

Does Baby Bunting install car seats?
＋

Yes — but that’s all they do. Your appointment is typically reduced to 15–20 minutes, leaving little time to ask questions or actually experience how the seat works.

If the weather’s over 35°C, it’s raining, or you’re 5 minutes late — your appointment may be cancelled.

If you don’t purchase a Britax car seat, you may be told the seat won’t fit your car. The company’s fast expansion also means you’re often getting less experienced sales staff and fitters, who may not fully understand every issue at hand.

An experienced ACRI mobile car seat fitter will instead come to your home or office and let you properly experience how the car seat works.