im unable to find a bosch oil filter for alto vxr cng..i managed to purchase the super4 series sparkplugs for alto but not the oil filter....i tried a few shops at gizri and zamzama but failed to find it since it was short in the market..secondly i would like to know from where i can purchase a lambda sensor..saw it on the bosch website,contacted adamjee diesel engg but the person on the other side attending my call was too dumb to understand!