As far as sourcing OEM or better aftermarket parts, my GO TO supplier is ROCKAUTO.COM, thus far no fakes and their pricing is hard to beat and more than makes up for them having to make you pay for shipping. After buying a Herko Knock Sensor from eBay for $18 which just duplicated the P0328 (High Voltage Output) code of the old Knock Sensor(KS), I ended up selecting the DELPHI AS10271 KS. But my goodness was I discouraged by what they were asking on eBay (between $84 to $195+shipping), Amazon for $77.06 and up. ROCKAUTO wanted a solid $66.79 + $5 shipping. Hitachi IGC0002 Ignition Coils were $38.79 each while all the usual suspects were $49 and above.
Now OEM spark we all know is Denso Iridium, Platinum (Atomic #78) is good but Iridium (Atomic #77) is better, well I went ahead and bit the bullet by opting for the latest and apparently, the best; NGK 97292 RUTHENIUM (Atomic #44) Spark Plugs. Its higher ignitability means a more thorough burn, less emissions, quicker throttle response, smother idle and better cold starts. What's not to love? Jeff Bezos wanted $13.84 per rendition, the Rock clocked below $9 asking for a cool and voluptuous $8.72 for each unit.
Now is it just me or do cars breakdown in inverse proportion to our available funds? When my 2009 Cube SL transmission died at 92,000 miles, my hands reached for the heavens when I read that 120,000 miles was the cut-off for a free tranny replacement. Just be sure to call ahead and have Nissan USA (1800-647-7261) on your side before calling the local Nissan dealer. When we're flush with cash it's upgrade time, that or we fix things that aren't broken, suddenly Michelins aren't good enough because nothing beats Pirelli P-Zeroes on your new set of Enkei rims. Therein lies the convoluted logic that made me get those $18 Knock Sensors, in other words, there is nothing speculative about the truths proclaimed by the Speculator. Nuff said, I second the motion!