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Britax Advansafix IV M Car Seat - Storm Grey

  • £189.00
  • (FREE UK Delivery)
  • RRP £220.00
Item In Stock | Free delivery from £50
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Britax Advansafix IV M Car Seat - Storm Grey

Britax Advansafix IV M Car Seat - Storm Grey is a Group 1-2-3 Car Seat suitable for children weighing 9-36kg, or 9 months - 12 years. This ISOfix Car Seat switches from harness to seat belt in just a few steps, providing maximum flexibility and protection as your child grows.

Why Should I Choose Britax Advansafix IV M Car Seat - Storm Grey?

From 9 Months - 12 Years

Britax Advansafix IV M Car Seat - Storm Grey is a toddler seat that transforms into a highback booster. It starts life with a five-point harness, which you can adjust for a perfect fit. Once your child reaches 15kg, you can flip the integrated mechanism to swap the harness for the 3-point seat belt. As your grows from toddler into child, simply adjust the headrest to suit.

Simple To Install

As an ISOfix Car Seat, you can install this car seat using the ISOfix points on your car to create a permanent and secure connection to your vehicle.

Decreases Crash Impact

A padded, 5-point harness keeps your baby safe within this car seat. The harness is designed to distribute forces across your child's body, reducing the impact in a crash. In addition: the extra contact point between your child's legs holds the lap belt in the optimum position over your child's pelvis. As a result, it offers increased protection of the delicate abdominal area. 

Highback Booster Protection

The shell of this car seat provides protection from head to hip - particularly in a side impact. Upper and lower belt guides ensure that the seat belt is always in the right position, while the padded headrest is safe and comfortable, providing extra support for the head and neck.

Stay Clean On The Road

It's easy to keep this Group 1-2-3 Car Seat looking great for years to come. To clean, remove the cover and put in the washing machine.

What Are The Specifications Of The Britax Advansafix IV M Car Seat - Storm Grey?

Dimensions (H x W x D): 60 - 83 x 44 x 47 cm

Weight: 11kg

Suitable from 9 - 36 kg (approx 9 months to 12 years)

Direction of travel: forward

Group: 1-2-3 Car Seat

What Is The Difference Between Britax Advansafix IV M and Britax Advansafix IV R Car Seat?

Britax Advansafix IV R Car Seat is the newer version of the Britax Advansafix IV M Car Seat. As a result, it has superior side impact protection (SICT). This takes the form of side impact pads located on either side of the headrest. These pads reduce impact by reducing the distance between the car and the car seat, deforming to take the crash force before it reaches your child. To install, all you need to do is adjust the SICT to the side of the car seat closest to your car door. 

Delivery within the UK mainland

  • FREE for 48hr delivery for UK mainland orders over £50
  • £5.00 for 48hr delivery for UK mainland orders under £50
  • £8.95 per box surcharge for UK Mainland Next Day Delivery (12:00 cutoff, week day deliveries only)
  • "In stock" orders are normally delivered within 2 working days. (Typical: order today, collected from warehouse tomorrow, delivered to you next day)
  • "Pre-order" items are dispatched once stock is received from manufacturer, a timescale is provided if available
  • "Sold out" items are currently unavailable

*Excludes remote locations where surcharge of £20 per parcel is applicable

*Please note that deliveries to Scotland can take an extra day to be delivered


Delivery to UK Islands & Highlands*

  • £20 per parcel (see list below) 
  • £50 per parcel for orders to the Channel Islands 
  • The standard delivery time to UK Islands & Highlands is 3 working days. 

*We deliver to Western Isles, Scottish Isles, Shetland, Orkney, Isle of Skye, Isle of Man, Isle of Wight, Highlands and Remote Areas. 

*Excludes remote locations where surcharge of £20 per parcel is applicable.

*Please note that you will be contacted after order placement with regards the number of parcels required to ship your order should it be more than 1. 


Delivery to mainland Europe*

  • £15 per parcel, for multiple parcels, multiple charges apply (please see below)
  • The standard delivery time to mainland Europe is 3 - 5 working days depending on geographic location. 

*We deliver to Austria, Belgium, Bulgaria, Czech Republic, Denmark, Estonia, Finland, France, Germany, Hungary, Ireland, Latvia, Lithuania, Luxembourg, Netherlands, Northern Ireland, Poland, Portugal, Romania, Slovakia, Slovenia, Spain and Sweden.

*Excludes remote locations where surchage of £20 per parcel is applicable.

*Please note that you will be contacted after order placement with regards the number of parcels required to ship your order should it be more than 1, multiple charges will apply. 

*All products by Britax, Graco, Joie, Nuna brands are restricted from being shipped outside of the UK mainland. Orders for these products with delivery addresses outside of the UK mainland will not be shipped. 


Delivery Timing

Occurs Monday to Friday, generally 9am - 6pm (excluding public holidays). Please note that collections occur Monday to Friday (excluding public holidays).


Please Note

  • If the buyer wants to cancel the order that is already in transit you simply reject delivery 
  • If the buyer accepts the parcel and then cancels the order, the return costs are at the buyers expense 
  • If a delivery is rejected or 3 delivery attempts are made without success the order will be automatically returned to sender
  • Cost to attempt re-delivery of an order is £15 per parcel for UK mainland & £30 per parcel for European addresses
  • Orders travelling outside UK mainland: You may wish to arrange insurance against loss or damage 
  • BuggyBaby's practice is to minimise shipment packaging and recycle outer-packaging where it is safe to do so. We may also use recycled packaging if the packaging provided by the manufacturer isn't sufficient. Please check contents. Any parcel refused without checking will be subject to £15 returns charge
  • Please note that product warranties are not valid outside of the UK mainland, we will try to help you as best we can with parts and fixes but delivery costs are chargeable 
  • If paying by card over the phone the delivery address must be the same as the billing address so that we can help prevent fraud. (If proof of address can not be provided)

We offer a 30-day return policy on all non-disposable items that are unused [Consumer Rights Act 2015]. If you are not satisfied with the products you purchased, simply send them back to us unused, in the original packaging and in resellable condition (at your own cost and risk). Include your order number and name. 

Conditions for refunds are:

  • Item must be with us within 30 days of receipt
  • We will repay the amount to the payment method used, eg. paypal, credit card, debit card
  • Delivery costs to return the item will not be refunded 
  • The product must be unused and returned with original packaging
  • The product and packaging must be in resell-able condition
  • We reserve the right to not reimburse for any used goods 


  • Cancellation and return of special order items and assembled furniture may be subject to a charge for us to re-stock
  • If you do not want to arrange your own return we can do so at a cost of £15 per package and per attempt (UK mainland only)
  • Items from bundles & packages are non returnable. Bundles & packages must be returned complete
  • If need be, we can supply a suitable transport carton at a cost of £10. 


Return address: 

1 Old Park Farm 
IP13 0LZ

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