Coleraine Neighbourhood Policing Team supported by the District Support Team took part in joint operation with DVA Enforcement and HMRC Fuel teams.
Officers worked in Portrush and Portstewart to ensure vehicles were in suitable condition and deter anti social driving.
15 vehicles were examined by DVA, 14 vehicles were found to have defects, 4 of which were in a dangerous condition.
4 vehicles were detected using red diesel.
14 fixed penalty notices were issued and 5 vehicle defect rectification notices issued.
Two people received community resolution notices for disorderly behaviour.