Best tire size for WagonR is 165/70/r13 if you can find it, if you want little wider tire then max is 175/70/r13 this size is available in pakistan in almost every renowned brand.
There is a temp indication light, it goes on when engine is overheating or cold, just like in 2009+ model city. WagonR has a new generation engine, even newer than PKDM swift engine, temp light is reliable system, because it is more noticeable when light goes on, many a times it happen in gauge based temp system that it is on max and driver could not notice it.
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