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Message: <blockquote data-quote="seewai" data-source="post: 633894" data-attributes="member: 11307">I'm not sure if the same item is sold in any shops locally but was told $180 is "very reasonable price".The built-in battery in the tyre-valves' sensors have a 7-year lifespan, according to the product description.So far the accuracy matches the air-pump readings at the gas station I frequent.It's not until I got this TPMS installed that I realized the tyres are 35psi cold (approx 25C) when I pumped them at 38psi hot (approx 40C).Depending on tyre temperature, I'd fill them up to higher or lower psi accordingly, from then onwards.I check once every few days and never leave it power on much.</blockquote>