Lot 9195: 1994 Porsche 964 Speedster

Based on my research, here are the common issues with the Porsche 964 Speedster’s rear spoiler:

Main Issues:

1. Bearing Failure - The most common problem is the ball bearing in the spoiler mechanism that fails over time due to moisture and corrosion. This causes grinding noises or rattling when the spoiler moves up or down.

2. Worm Gear Problems - The worm gear mechanism can seize or become damaged, preventing proper spoiler operation.

3. Spoiler Wall/Bellows Deterioration - The accordion-like spoiler wall (also called the bellows or grille) that directs airflow over the engine can rip apart over time, especially on older cars.

4. Motor and Electrical Issues - The electric motor can fail, or there can be electrical problems with the control unit, speed sensor, or relays that prevent the spoiler from raising (typically at 80 km/h/50 mph) or lowering properly.

5. Mechanical Binding - The spoiler can get stuck in the raised position due to mechanical binding in the mechanism, sometimes caused by corrosion or worn components.

Typical Symptoms:

• Spoiler fails to raise at speed (usually 80 km/h)
• Spoiler gets stuck in the up position
• Grinding or rattling noises during operation
• Warning light on dashboard
• Spoiler sits too high when retracted

Prevention/Maintenance:

• Regular lubrication of the mechanism
• Keeping the area clean and free of debris
• Addressing any moisture issues that could cause corrosion
• Replacing the bearing and gear components with upgraded parts when servicing

The 964 Speedster uses the same basic retractable spoiler mechanism as other 964 models, so these issues apply to your car.