"To update the exterior" means to make changes or improvements to the outward appearance of something, such as a building or a vehicle. Full definition
This year, it adds a new lineup of engines, including the first - ever diesel option along with updated exterior styling. (harmarvilleford.shults28.com)
Changes to the vehicle include updated exterior styling, new entertainment technology, and more powerful engine options. (thenewswheel.com)
These tail lights give a refreshing upgrade from your factory set and also updates the exterior look of your vehicle. (amazon.co.uk)