Yes, with minor modifications, you can add an armrest to any car. You can consider buying items like MLOVESIE Auto Center Console Armrest Pillow. It comes with Memory Foam Car Armrest Cushion with a Phone Holder Storage Bag Universal Fit for Most Cars. The Timor Car Armrest Cushion can be installed in most cars. Other options that you can consider buying include Car Center Console Armrest Pillow and Auto Center Console Pad.