How to Convert Your My Babiie Travel System to a Pushchair

Quick answer

To convert your My Babiie 3-in-1 travel system to pushchair mode, remove the infant carrier or carrycot from the frame, then click the seat unit into the same attachment points until both sides lock. Always check the seat is secure and facing the direction you want before you fold or push. The MB450i and MB450 Arc both use a seat unit suitable from birth to 22kg, so you can switch as soon as your baby is ready.

Before you start: what you need and what to check

You do not need tools for this conversion on My Babiie 3-in-1 travel systems. Work on a flat, clean surface with the brake on, and have the seat unit within reach. If your travel system is currently in car seat mode, take a moment to confirm the chassis is fully open and the frame locks are engaged before you remove anything.

The main decision is which mode you are leaving. If you are switching from the rotating i-SIZE infant carrier on the MB450i, release the carrier from its adapters first. If you are switching from the carrycot, lift it straight up once the side buttons or levers are pressed. The seat unit then fits the same frame receivers.

• Brake on and chassis locked open
• Seat unit unclipped and ready
• Flat surface so you are not holding the frame one-handed

Step 1: Remove the car seat or carrycot from the frame

Locate the release mechanism on the infant carrier or carrycot. On the MB450i rotating i-SIZE infant carrier, the release is on the carrier handle or base adapter, depending on how it is fitted. Press or squeeze the release and lift the carrier straight up and away from the frame. Do not twist it as you lift, because the adapters are shaped to guide it out in one direction.

If you are removing the carrycot, press both side release buttons at the same time and lift the carrycot vertically. Put it down somewhere safe, not balanced on the chassis. This is the point where most people damage the frame finish: they pull the carrycot at an angle because one button is not fully pressed.

Step 2: Fit the seat unit into pushchair mode

Hold the seat unit by the frame or handle, not the fabric, and line up the attachment points on both sides with the receivers on the chassis. Lower it evenly until you hear or feel a click on each side. Push down on the front of the seat to confirm it is seated, then give it a gentle pull upward. If one side moves and the other does not, lift it out and start again rather than forcing it.

The seat unit on the MB450i and MB450 Arc is suitable from birth to 22kg. That means you can use pushchair mode from day one if you prefer, not only after the carrycot stage. Check the seat is facing the direction you want before you lock it in, because some parents find it easier to fit the seat parent-facing first and rotate later.

Step 3: Check the seat, harness and fold before you go

Once the seat is locked, adjust the harness to your child's size and confirm the buckle clicks shut. Give the seat a firm push side to side and front to back. A correctly fitted seat unit should not rock independently of the frame. If it does, remove it and re-seat it, checking that no fabric or strap is trapped in the receiver.

If you need to fold the travel system with the seat unit attached, check your specific model's fold instructions first. The MB450 Arc is designed around a folding carrycot that stays attached to the chassis and folds with the frame, which is a different process from removing the seat unit. Do not assume the seat unit folds the same way as the carrycot.

Common mistakes to avoid during conversion

The most frequent problem is not pressing the release fully before lifting the car seat or carrycot. That puts strain on the adapters and can make the next fit feel stiff. The second is fitting the seat unit without checking both sides are locked, which shows up as a wobble that only appears when you push over a curb.

A third mistake is leaving the rain cover or foot-muff attached while you swap modes. The MB450i includes a cosy quilted foot-muff and a waterproof rain-cover for the carrycot and car seat, and those accessories can catch in the receivers if they are left loose. Remove them, fit the seat, then reattach the accessories you need for the weather.

Pushchair conversion steps at a glance

1. Park and lock the chassis: Apply the brake and confirm the frame is fully open and locked before removing any unit. Checkpoint: the chassis should not fold or shift while you work.
2. Release the car seat or carrycot: Press the release mechanism fully and lift the unit straight up and away from the frame. Common mistake: pulling at an angle before the release is fully pressed.
3. Fit the seat unit: Line up both attachment points, lower the seat evenly, and push down until each side clicks. Checkpoint: pull up gently on the seat to confirm both sides are locked.
4. Adjust harness and accessories: Set the harness to your child's size, then reattach the foot-muff or rain-cover only after the seat is secure. Next step: test the pushchair on a short indoor roll before heading out.

My Babiie travel system facts for pushchair mode

• MB450i 3-in-1 Travel System with Rotating Car Seat + Base - Ivory: Includes chassis, carrycot suitable from birth to 6 months, seat unit suitable from birth to 22kg, rotating i-SIZE infant carrier and adapters suitable from birth to 87cm, ISOFIX base, cosy quilted foot-muff and waterproof rain-cover. You can move from car seat mode to pushchair mode using the same chassis, and the seat unit covers a much longer period than the carrycot, so pushchair mode becomes your main setup as your child grows.
• MB450i 3-in-1 Travel System with Base - Steel Blue: Includes chassis, carrycot suitable from birth to 6 months, seat unit suitable from birth to 22kg, i-SIZE infant carrier and adapters suitable from birth to 87cm, ISOFIX base, cosy quilted foot-muff and waterproof rain-cover. This version uses a standard i-SIZE infant carrier rather than a rotating one, so the removal step is a straight lift rather than a rotate-and-lift, but the seat unit fitting process is the same.
• MB450 ARC 3-in-1 Travel System - Onyx Black: MB450 ARC features an innovative folding carrycot that stays attached to the chassis and folds down with the frame, creating one compact unit. If you own the MB450 Arc, folding with the carrycot attached is a designed feature, but converting to pushchair mode still means removing the carrycot and fitting the seat unit to the same frame.