Remove the engine room front under cover and RH side cover.
(Refer to Engine and Transaxle Assembly - "Engine Room Under Cover")
Remove the drive belt.
(Refer to Drive Belt System - "Drive Belt")
Remove the idler (A).
Tightening torque :
53.9 ~ 63.7 N.m (5.5 ~ 6.5 kgf.m, 39.8 ~ 47.0 lb-ft)
Install in the reverse order of removal.