The Britax Millenia is now a discontinued convertible car seat and can only be purchased second-hand. When in production it was an excellent seat. It has been replaced by the B-Compaq or the Graphene EA iFix. This review covers the important aspects that other good seats should have.
It was an easy-to-use convertible car seat (loosen and tighten the harness) with easy adjustment in small increments. The Millenia included both Isofix and seatbelt installation options, with three recline positions: one rear-facing, one upright forward-facing, and one reclined forward-facing.
🌬️ Thermo fabric
The Thermo fabric is a wicking material designed to draw moisture away from your child, keeping them cooler. It is also easier to clean.
🔧 Britax Millenia Isofix
In 1997 Britax, along with Volkswagen, created the Isofix system to help parents install child restraints more easily. With over 20 years of experience, the Isofix on the Millenia is easy to attach, easy to tension, and provides a solid installation. When Isofix cannot be used, the connectors tuck neatly into a compartment.
🛋️ Britax Millenia recline
The Millenia has three recline positions: one rear-facing and two forward-facing. Forward-facing recline is adjusted by lifting the front lever. Rear-facing recline requires lifting the forward-facing lever and pressing the base lever at the same time.
🎽 Safer harness design
The Britax Millenia, like all Britax seats, has a harness increment of 15mm. Other manufacturers such as Maxi Cosi use 30mm increments, and Infa Secure uses roughly 40mm. Smaller increments mean the harness sits closer to your child’s shoulders, keeping them safer.
An additional benefit of smaller increments is that there is less chance your child will slip their arms out of the harness.
🧼 Easy cleaning
Unlike many other car seats, the Millenia covers can be easily removed for cleaning.
🔧 Britax baby seat installation
Installation of the Millenia is easy when your car has Isofix points. Seatbelt installation is straightforward using the Britax lock-off clips for both rear-facing and forward-facing. A tighter fit can be achieved with a locking clip.
🙋 If you have doubts about installing your child restraint, call a professional baby seat installation expert.
❓ Frequently asked questions
Is the Britax Millenia still available to buy? +
What replaced the Britax Millenia? +
Was the Millenia a good seat when it was available? +
Should I buy a second-hand Britax Millenia? +
Should I get professional installation for a second-hand seat? +
Baby Seat Installation Melbourne
Have a second-hand Millenia, or choosing its replacement? Book a fitting for expert, independent advice.

