timing belt replacement

You can get the timing belt estimate here at RepairPal, https://repairpal.com/estimator/lexus/ls400 The additional cost for the front seals (two cam seals and 1 crankshaft seal) will add approx 1 hour of labor ($90-$100) +parts ($60.00 - $100.00) They will have the distributor caps and rotors off so if they show signs of wear it's a good time to replace them, along with the timing belt tensioner and idler pulleys.