The turbulent fluctuating pressure on the outer surface of the door sealing strip is the source of wind noise transmitting from the sealing strip into the interior of the vehicle. The excitation could be coupled with the sealing structure, resulting in large noise transmitting into the interior compartment in mid frequency bands. However, the fluctuating pressure characteristic outside the sealing surface is rarely reported in the literature. This paper uses IDDES (improved delay detached eddy simulation) based on SST k−ω equations, which are verified by the wind tunnel data of the Ahmed body, to simulate a full-scale automobile model that includes the door-body gap and outer surface of the door sealing strip. A common highway condition with crosswind, i.e., 120 km/h with a yaw angle of − 20 degree, is considered as the working case. The fluctuating pressure characteristics on the outer seal surface are examined, by taking a specimen of about 50 mm in length at the rear of the A-pilar of the car. Several considerable features of the fluctuating pressure are obtained, which is also compared to that on the side window. This study will provide preliminary basis for the vibro-acoustic analysis of the door sealing strips under the wind excitation at high speed of a car.