Unfortunately there is no easy solution for this. If the belts in your car are too short, we can only recommend that you contact the car manufacturer via your garage. Note; if this involves the passenger seat, always check that this is positioned as far back as possible. The belts are then the longest. Of course, careful attention should be paid to the instructions regarding airbags. We recommend that you fit the car seat first before purchasing it. The retailer can help you with this.