Researchers swabbed various parts of car interiors to find out just how much bacteria is growing in our vehicles.
The study conducted by vehicle hire company Leasing Options found child car seats contained bacteria – with loads faeces in.
This was three times above a healthy amount, leaving kids more susceptible to sickness bugs.
The findings come as a survey from the vehicle leasing firm found almost half of parents (44 per cent) only clean their car seats twice a year.
A further one in ten only wash it out once a year.
Worse still 16 per cent never give it a scrub.
Steering wheels, hand brakes, gear sticks and radios were swabbed.
And all registered at 10 to 20 LOD (Limit of Detection) for bacteria – a normal amount.
But when child car seats were checked they registered an incredible 3,000 LOD, with the main bacteria being faecal streptococci.