Leaks are known to develop in the cooling system. It is common to see more than one part recommended for repair/replacement due to overlapping labor and the use of many plastic parts in the system.Google+
Car Problem Reports
BMW 740iL Multiple Parts May be Recommended For Leaks in Cooling System
BMW 740iL Problem
Average Mileage: 140,570 mi (11,300 mi - 361,800 mi)
Visitor, 2000 BMW 740iL, 122,000 mi
coolant level is going down,,but it's not Leaking on the ground..it just started..very odd..
have had the BMW dealership replace everything but the radiator. Is there a recall on this problem with my BMW
leak in cooling system. Hard to find. Continual smell of coolant. $5,000 later
Visitor, 1998 BMW 740iL, 90,100 mi
Coolant leak. Looking for leak and seems to be between firewall and rear of motor.
Visitor, 2001 BMW 740iL, 100,650 mi
cooling leak rear hose between motor an fire wall
Visitor, 1999 BMW 740iL, 136,000 mi
Coolant leak in Cooling Valve Aux Pump.
when i turn heat on i smell coolant i dont see any leaks but goes somewhere into a pan
Visitor, 1998 BMW 740iL, 160,000 mi
low coolant level
Visitor, 1993 BMW 740iL, 11,300 mi
check coolent light kept going on .now coolent has all leaked out on my driveway and check engine light is on/
Visitor, 1997 BMW 740iL, 170,000 mi
unit was woring and suddenly shut off, button for ac doesnt light up and recirculating air also ceased to function