britax 300mm extension strap Maxi Cosi Child Restraint Extension Strap – 300mm or 600mm

britax 300mm extension strap Maxi Cosi Child Restraint Extension Strap – 300mm or 600mmNeed a little extra reach for your child restraints top tether or anchor strap? The Maxi Cosi Child Restraint Extension Strap gives you the flexibility to securely connect car seats in cars where standard length straps dont quite reach perfect for station wagons, hatchbacks, or any vehicle with awkward anchor point placement. Choose between two lengths depending on your cars needs: 300 mm for modest extra length, ideal in many small to medium

Need a little extra reach for your child restraint’s top tether or anchor strap? The Maxi Cosi Child Restraint Extension Strap gives you the flexibility to securely connect car seats in cars where standard-length straps don’t quite reach — perfect for station wagons, hatchbacks, or any vehicle with awkward anchor-point placement.

Choose between two lengths depending on your car’s needs:

• 300 mm — for modest extra length, ideal in many small-to-medium vehicles.

• 600 mm — for larger vehicles or when extra slack is required to reach the anchorage point.

This extension strap is compatible with any child restraint manufactured since 1993 that uses a hook anchorage, making it a versatile add-on for most car seats and capsules with the Dorel group.

What we love

• Two size options (300 mm & 600 mm) — choose the correct strap length for your vehicle setup.

• Solves tether reach issues — great for cars without a fixed parcel-shelf anchor point (like station wagons, hatchbacks, or vans).

• Universal compatibility — works with most child restraint seats and capsules that use hook anchorage.

• Simple, effective add-on — no need to replace the whole seat if tether length is an issue; just add the strap.

• Affordable and practical — a low-cost solution to common installation problems that can save stress and improve safety compliance.

Why it's for you

• Perfect if you own a wagon, hatchback, van, or 4WD where standard top-tether straps don’t reach the anchor or you have a split middle seat. .

• Ideal for families with multiple cars, where not every vehicle’s anchor point is ideally placed.

• Great for parents who value correct installation and safety compliance — sometimes a simple extension strap makes the difference between installing correctly or not.

• Excellent if you already own a car seat that works — no need to upgrade or buy a new seat just to fit your vehicle.

Maxi Cosi has 12 month warranty on accessories from the date of original purchase. As well as a dedicated Australian support team back every car seat..

Need help installing? Check out our Car Seat Installation Service for hands-on support.
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