California Code, Civil Code - CIV § 1955

Except as otherwise agreed by the lessor and the lessee in lease agreements for a term of more than 20 days, one who leases personal property must deliver it to the lessee, secure his or her quiet enjoyment thereof against all lawful claimants, put it into a condition fit for the purpose for which he or she leases it, and repair all deteriorations thereof not occasioned by the fault of the lessee and not the natural result of its use.