1999 Subaru Legacy Owner's Manual - Page 316

Corrosion protection Your SUBARU has been designed and built to resist corrosion. Special materials and protective finishes have been used on most parts of the vehicle to help maintain fine appearance, strength, and reliable operation. J Most common causes of corrosion The most common causes of corrosion are: 1. The accumulation of moisture retaining dirt and debris in body panel sections, cavities, and other areas. 2. Damage to paint and other protective coatings caused by gravel and stone chips or minor accidents. Corrosion is accelerated on the vehicle when: 1. It is exposed to road salt or dust control chemicals, or used in coastal areas where there is more salt in the air, or in areas where there is considerable industrial pollution. 2. It is driven in areas of high humidity, especially when temperatures range just above freezing. 3. Dampness in certain parts of the vehicle remains for a long time, even though other parts of the vehicle may be dry. 4. High temperatures will cause corrosion to parts of the vehicle which cannot dry quickly due to lack of proper ventilation. J To help prevent corrosion Wash the vehicle frequently. If you drive on salted roads in the winter or if you live in a coastal area, you should flush the underbody with fresh water frequently. After the winter has ended, it is recommended that the underbody be given a very thorough washing. Before the beginning of winter, check the condition of underbody components, such as the exhaust system, fuel and brake lines, brake cables, suspension, steering system, floor pan, and fenders. If any of them are found to be rusted, they should be given an appropriate rust prevention 9-4