How often should a private car undergo annual inspection after six years?

[LaAaron]

After the implementation of the new vehicle inspection regulations, cars between 6 and 10 years old must undergo inspection every 2 years. At the 6th and 8th year, the vehicle must be tested on the inspection line. For private cars older than 10 years, the original inspection cycle still applies, meaning cars between 10 and 15 years old must be inspected once a year, and those older than 15 years must be inspected every six months. The details are as follows: 1. Exhaust emission test: During the annual inspection, the vehicle's exhaust emissions will be checked for compliance, specifically the oxygen sensor and the three-way catalytic converter. Their optimal operating temperature is between 400 to 800 degrees Celsius, so it is recommended that owners warm up the vehicle in the external inspection area before the exhaust emission test to increase the pass rate. 2. Clean the vehicle body: Before the annual inspection, owners should clean the vehicle body in advance. Cleaning the vehicle body, engine compartment, and chassis beforehand can make it easier for the inspectors and help pass the inspection.