This part of the VTC mechanism is used on both the late model VQ35DE (RevUp variant) as well as the VQ35HR engines. While Nissan has never sold them separately for the Z & G, they did offer a service campaign for the same issue on the Maxima, and we found through customer feedback that it happens to be the exact same part. The attached TSB Instructions are for the Maxima, the procedure is largely the same for the Z & G.

Please note that we have also learned that often times the magnet retarders are not the issue, and in fact the VTC over-advance or under-advance codes are often caused by the Oil Gallery Gaskets failing, which prevents adequate oil pressure from reaching the heads.