Pushchair company Bugaboo has warned customers that a fault on one of its models could cause it to tip over.
Sales of the £480 Bugaboo Bee have now been halted and parents who already own one are being sent a replacement wheel set.
Safety tests found that the stroller's front wheels could jam, potentially leading to it tipping over. The problem arose after the firm swapped metal-bearing wheels for plastic after some customers complained the wheels were vibrating.
A statement on the company's website said: "The safety and wellbeing of our customers and their children is paramount to Bugaboo.
"Previously this year we found that, although non-swivelling wheels affect the driving experience, we believed it did not affect the safety of the stroller.
"However, the latest safety assessment by an independent expert concluded, following further tests, that there is a small chance that the stroller's front wheels could jam, which could potentially make the stroller tip over. In light of this, we believe that the safety profile of this product is inadequate and not up to our quality standard."
The Bee received a Mumsnet Best Awards 2011 prize, and Bugaboo came first in a vote of Which? members' favourite pushchair brand in March.
The company has now gone back to using the original metal-bearing wheels and will exchange plastic ones on all pushchairs with a production date between January and September this year.
The statement added: "We believe that these metal-bearing swivel wheels will be the solution to the non-swivelling issues some Bugaboo Bee customers are experiencing and remove any potential for tip-over and the risks associated with tip-over."
Customers who have registered their product will be sent the replacement wheels over the next three to four weeks. Anyone who has not registered their buggy will need to contact the company.
