OE-standard Quality: DENSO can guarantee the quality of the product they produce because they are able to acquire cores from a variety of sources. Every core goes through a rigorous quality control process prior to being accepted for remanufacturing. If the core doesn't meet their stringent standards, it's sold to a core broker who will find a remanufacturer with lower standards. In the end, it all comes down to quality and DENSO produces the finest remanufactured parts on the market. Precision designed, performance tested, OE-standard quality ? that's what the DENSO name stands for.