California Car Rental in downtown San Diego's Middletown, opened in April 2024 as a sole proprietorship at 1021 West Maple Street, is an independent agency operating outside the airport Consolidated Rental Car Center cluster. Fleet vehicles requiring on-site diagnostics or roadside repair dispatch through mobile mechanics such as Onsite San Diego Mobile Mechanic in Bankers Hill, eliminating the need to tow a disabled rental to a fixed shop. The Maple Street lot sits in a residential-commercial zone between Pacific Highway and Kettner Boulevard, giving renters direct access to I-5 northbound and Harbor Drive westbound without navigating downtown's one-way grid. Between-rental cleaning runs through mobile wash services including iSmart Wash, which handles exterior rinse and interior vacuum directly on the Middletown lot between back-to-back bookings. The most involved transactions serve insurance-replacement renters who need a vehicle matched to their policy's daily-rate cap while their own car undergoes extended body-shop repair.