1999 Subaru Legacy Outback Problems

RepairPal has identified the most common problems with the 1999 Subaru Legacy Outback as reported by actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.

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Known Problems
A failure in the anti-lock brake system (ABS) causes the ABS pump to continuously run, which will eventually wear down the battery. An improved ABS relay is available to solve the problem.

Subaru issued a recall (WWG-90) because the mass air flow sensor has a manufacturing defect.

The head gasket has a high failure rate due to cooling system problems. Subaru is aware of the problem and has extended the warranty to 8 years/100k miles on many vehicles.

Front engine oil leaks can develop from the camshaft seal and the crankshaft front seal. If one or more seals require replacement, it may be wise to consider replacing the timing belt as well. These seals are commonly inspected and replaced as needed as part of a timing belt service.

The leak may develop from the oil pump seal. Our technicians prefer to use thread locker when replacing the seal to prevent the bolts from becoming loose again.