Bugger, the report i have is about the quite pretty early UK aw11 ecus which didnt manage to run a cat over in the UK, so no more facts about exactly what the O2 sensor does listed here. The 5 valve head is Toyota's reward towards the 4AG after the https://alexispnljg.techionblog.com/26809481/how-much-you-need-to-expect-you-ll-pay-for-a-good-4age-engine-sale