Coolant leaks coming from the underbody on vehicles equipped with rear heat/AC are common. The underbody hoses should be inspected as part of regular maintenance. If you drive on roads where salt is prevalent the problem is generally more severe. Some 2005 models are involved in a special service action, no government recall was issued.
Underbody Coolant Leak on Dodge Caravan
Average mileage: 136,447 (60,000–199,885)
10 people reported this problem
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Rear heater core needs replacement. Leaking anti freeze bottom right, rear tire area, where rubber hoses go into rear heater core. Quote of $648.00 to repair. By pass for now! No heat or AC in rear of Van.