My 08 G35 I have done minor maintenance until just recently at 97k when water pump and thermostat went down. I spent around 1.5k to do complete repair and replacement of all major maintenance on top of motor (spark plugs, coil packs, water pump, thermostat, new coolant, replaced plastic chain tensioners, clean EGR value, clean upper motor intake, throttle body). Recently also i had to replace BCM and clean cables to fuse box due to short which was around $360 through Infiniti. I purchased limited coverage from Infiniti after 60k to around 86k but never had to use it. It seems with these cars everything seems to happen close to 100K or over. I saw one post stated they replaced (lower control arm bushings and lower ball joints). I have my suspension checked with Infiniti as well as my mechanic and goodyear. None of them stated i had any leaking or needed replacement of suspension. Is the suspension need to be replaced around 100k or its as a need bases?