2021-2024 Toyota Models: Acid Rain Paint Protection

Acid rain is a significant environmental concern that can severely damage a vehicle's paint finish. This phenomenon occurs when airborne chemicals or particles mix with rainwater, dew, or high humidity, forming acidic compounds. When these contaminants settle on a vehicle's painted surface, particularly horizontal areas like the hood, roof, and decklid, they can cause considerable damage.

The damage manifests as etching or water spots on the paint. As acid rain droplets evaporate, the concentration of the acid increases, leading to deeper and more rapid damage. Dark-colored cars are particularly susceptible, as direct sunlight can accelerate this corrosive action.

What Owners Should Know

Toyota emphasizes the importance of protecting your vehicle's paint finish from the moment it arrives at the dealership until it's delivered to you. While Toyota continually improves paint quality, durability, and resistance to environmental factors, proactive measures are essential, especially in areas prone to acid rain.

Owners of 2021-2024 Toyota models should be aware of the following warnings:

• "Wash vehicles as soon as possible following an acid rain or industrial fallout occurrence. Damage to paint can start within minutes AFTER contact under these conditions."
• "Review local weather on an app or website to check rain acidity levels after precipitation."

Recommended Washing Schedule

To minimize the potential for paint damage from acid rain, especially during periods of high heat or humidity, a frequent vehicle washing schedule is recommended. This applies to new vehicles stored outside in areas with high frequency and/or concentration of acid rain. Following this schedule helps protect your Toyota Camry acid rain paint and other affected models.

For general weather conditions, the washing frequency depends on ambient temperature:

• For temperatures between 60° – 85°F (15.5° – 29°C): A minimum of once per week.
• For temperatures above 86°F (30°C): A minimum of twice per week.

During rain, heavy dew, or fog conditions, the washing frequency is increased:

• For temperatures between 60° – 85°F (15.5° – 29°C): Every other day.
• For temperatures above 86°F (30°C): Every day.

Preventing Water Spots

Beyond the washing frequency, the type of water used is also important for preventing water spots. Toyota recommends using either reverse osmosis or deionized water for washing. This helps ensure that minerals in tap water do not leave unsightly spots on the paint surface after drying.

Superseded Bulletin Information

This Technical Service Bulletin, T-SB-0039-24, updates and supersedes Service Bulletin No. BO92-005. The entire bulletin has been updated with the latest recommendations for paint protection. Any printed versions of Service Bulletin No. BO92-005 are now considered obsolete and should be discarded, as the information contained within is no longer current.

NHTSA ID: 11003594