How to Install the Mimi LUNO ISOFIX Base

Posted by Angie Hough on March 25, 2026

The AVARO ISOFIX base is designed to provide a consistent installation method for the AVARO R129 / i-Size infant car seat when used in a compatible vehicle seating position.

Correct installation matters. Always check the ISOFIX connectors, support leg, visual indicators and car seat connection before using the seat for vehicle travel.

See how to install and secure the AVARO ISOFIX base.

Quick Answer

To install the AVARO ISOFIX base:

Check that your vehicle has ISOFIX anchor points
Position the base on the vehicle seat
Connect both ISOFIX arms to the vehicle anchor points
Push firmly until both sides click into place
Position the support leg correctly on the vehicle floor
Check that all visual indicators show correct installation
Attach the AVARO infant car seat and confirm it is locked onto the base

ISOFIX may help reduce some installation errors when used correctly, but it does not make a car seat automatically safe. Correct installation, vehicle compatibility and the product manual still matter.

Before You Start

Before installing the AVARO ISOFIX base, check the vehicle and product instructions.

Confirm that your vehicle has ISOFIX anchor points
Check that the chosen seating position is suitable
Read the AVARO manual before installation
Check your vehicle manual for child restraint guidance
Make sure the vehicle seat backrest is upright and locked where applicable
Keep the ISOFIX anchor area clear of loose items or debris

Not all vehicles, or all seating positions within a vehicle, are suitable for ISOFIX base installation. If you are unsure, check your vehicle manual or ask for support before using the seat.

Step-by-Step Installation

1. Position the ISOFIX Base

Place the AVARO ISOFIX base flat on the vehicle seat
Align the base with the vehicle ISOFIX anchor points
Make sure the base is facing the correct direction for rearward-facing AVARO use

2. Extend the ISOFIX Connectors

Release and extend the ISOFIX connector arms
Line the connectors up with the vehicle ISOFIX anchor points
Keep the base level and correctly positioned on the vehicle seat

3. Connect to the ISOFIX Anchors

Push the ISOFIX connectors into the anchor points
Apply firm, even pressure until both sides click into place
Check that both connector indicators confirm attachment

Both sides must be fully engaged. Do not use the base if one side is not properly connected.

4. Position the Support Leg

Extend the support leg down to the vehicle floor
Make sure it rests firmly on the floor as instructed in the manual
Check that the support leg indicator confirms correct positioning where applicable
Do not place the support leg on loose objects, mats that interfere with positioning, or unsuitable floor areas

The support leg is part of the base installation. It must be positioned correctly before the car seat is used.

5. Final Base Check

Check that both ISOFIX indicators show correct connection
Check that the support leg indicator shows correct positioning where applicable
Confirm that the base feels stable on the vehicle seat
Check that the base does not lift, loosen or shift unexpectedly

If anything feels loose or unclear, remove the base and reinstall it according to the manual before using the car seat.

Attaching AVARO to the ISOFIX Base

Once the base is installed correctly, the AVARO infant car seat can be attached to the base.

Hold the AVARO infant car seat above the base
Lower the car seat onto the base connection points
Press down until the car seat clicks into place
Check the visual indicator where applicable
Gently lift or test the seat connection to confirm it is locked

Always confirm that AVARO is fully locked onto the base before driving.

Using the Mimi SideProtect System

The Mimi SideProtect System is part of the AVARO infant car seat design.

Where instructed, position the SideProtect System on the side of the car seat closest to the vehicle door.

Check which side of the car seat is closest to the vehicle door
Position or extend the SideProtect System as instructed
Make sure it is correctly engaged before use
If the car seat is installed in a centre seating position, follow the manual for correct SideProtect positioning

Do not force any side-impact component into a position that does not fit the vehicle seating area. Follow the AVARO manual for the correct setup.

Before Every Journey

Before driving, do a quick installation check.

Check that the ISOFIX indicators still show correct connection
Check that the support leg is still correctly positioned
Confirm that AVARO is locked onto the base
Check that the harness is correctly positioned and tightened around the baby
Make sure there are no loose items interfering with the base or support leg

These quick checks help make sure the base and car seat remain correctly positioned during everyday use.

Common Installation Mistakes to Avoid

Using the base in a vehicle seating position without suitable ISOFIX anchor points
Assuming one clicked connector means both sides are secure
Forgetting to position the support leg correctly
Using the car seat before checking the visual indicators
Allowing loose mats or objects to interfere with the support leg
Attaching the car seat without confirming it has locked onto the base
Using the base without reading the vehicle manual and AVARO manual

Important Safety Notes

AVARO is approved under UN R129 / i-Size for rearward-facing infant vehicle travel from 40 to 87 cm and up to 13 kg.
The ISOFIX base must only be used in compatible vehicle seating positions.
Do not use the base if the indicators do not confirm correct installation.
Do not use AVARO forward-facing.
Do not add unapproved inserts, padding or accessories to the car seat.
Replace the car seat after any accident, even if no visible damage is present.
Always follow the AVARO manual and your vehicle manual.

Practical Tips for Parents

Leave the base installed if you use the same vehicle regularly
Check the indicators before every trip
Keep ISOFIX anchor points clear and accessible
Check the support leg whenever the base has been moved or adjusted
Ask for help if you are unsure whether the base is installed correctly

Frequently Asked Questions

Do all cars support ISOFIX?
No. Not all vehicles include ISOFIX anchor points, and not every seating position is suitable. Check your vehicle manual before installation.

Does ISOFIX make a car seat automatically safe?
No. ISOFIX may help reduce some installation errors when used correctly, but correct installation, vehicle compatibility and the product manual still matter.

Can the AVARO ISOFIX base stay installed in the car?
Yes, provided it remains correctly installed, the indicators show correct connection and the support leg remains correctly positioned.

What should I check before each trip?
Check the ISOFIX indicators, support leg, car seat lock-in, harness fit and the baby’s positioning before driving.

Can I use the AVARO ISOFIX base with any infant car seat?
No. Use the base only with the compatible AVARO infant car seat as instructed by Mimi Baby.

Related Guides

Explore the Full System

If you prefer a setup where the stroller, AVARO infant car seat, ISOFIX base and adapters are designed to work together from the start, compare the Mimi LUNO range.

View the Mimi LUNO Range

Important Note for Parents

This guide provides general setup support for the AVARO ISOFIX base and AVARO infant car seat.

It does not replace the AVARO manual, your vehicle manual, product-specific instructions, formal safety standards or professional guidance where needed.

Always use AVARO only for its intended context: rearward-facing infant vehicle travel from 40 to 87 cm and up to 13 kg, according to the product manual.

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