The IS 300c may have several common faults.

One common issue could be electrical connection faults. This might result in various problems like malfunctioning of lights, non-responsive dashboard displays, or issues with the audio system. To address this, a thorough inspection of the electrical circuits and connectors is necessary.

Another possible fault could be in the engine performance. Problems such as abnormal noises, reduced power output, or excessive fuel consumption might occur. Regular engine maintenance, including oil changes and filter replacements, can help prevent or identify such issues.

Mechanical components like the suspension system can also have faults. Uneven tire wear, poor handling, or uncomfortable rides could indicate suspension problems. Checking and maintaining the suspension components at regular intervals is important.

Faults in the braking system are also not uncommon. Fading brakes, longer stopping distances, or squeaking noises could be signs of brake problems. Regular brake inspections and pad replacements as needed can ensure safe braking.

Keep in mind that regular maintenance and timely checks can help detect and address these common faults early, ensuring a smooth and reliable driving experience with the IS 300c.