Buy a full set of toner in the last 6 months of each year's warranty and you can extend the coverage for another year - for free.
“Free Extended Warranty” program from Xerox is a renewable 12 month Xerox warranty free to claim for up to 4 years, subject to buying a full set of specific Xerox brand supplies within 6 months preceding the end of the existing warranty, no lapses in warranty cover allowed. Terms are found here. Applies only to specific equipment and supplies purchased during the period stated in the Terms in United Kingdom, France, Germany, Italy, Belgium, the Netherlands, Spain, Portugal, Switzerland, Austria, Sweden, Norway, Denmark and Finland from Xerox or a reseller in those locations. Supplies must be sourced from within the EEA and Switzerland. Eligibility is determined by Xerox (may cease after pagecount reached, or due to working condition and product obsolescence).