My vehicle has degraded braking performance. i investigated and discovered gear-oil leaking from rear axle onto break rotors. further investigation reveals this is an epidemic. nhtsa item number 10033306 indicates that this is a recurring problem for 2007 nissan xterra. increased stopping distance and degraded breaking performance has probably contributed to numerous accidents already. it may have already resulted in fatalities. as a registered professional engineer, i urge you to initiate a recall of all vehicles prone to this defect. it can be eliminated by simply replacing defective rear-axle seals. *tr