The findings of studies on the failure states of steering components are outlined in [9], emphasizing that the effectiveness of the steering system is a critical aspect in terms of road safety. During bench tests, the ball pin of a vehicle with a Gross Vehicle Weight (GVW) exceeding 3500 kg was examined. Based on the results obtained, the maximum number of cycles for the pin connection, defining a failure condition when the required level of safety is not met, was estimated. Importantly, it was highlighted that there are no clear indicators defining a failure condition for a ball stud. Therefore, research should be conducted to establish diagnostic procedures that unambiguously assess the technical condition of the ball stud, ensuring that the result is independent of the individual conducting the periodic vehicle inspection. It is noteworthy that the concept of technical condition is not only applicable to modern vehicles. One paper [10] highlights the deficiencies in periodic inspection procedures for historic cars at vehicle inspection stations in Poland. The responsibility for assessing the technical condition of a historic car and deciding on its admission to traffic lies with the diagnostic, who lacks appropriate guidelines. Attention is also drawn to the safety issue arising from collisions between modern and historic cars. It appears that the procedures for the periodic diagnosis of braking systems need to be revised. In their study, the authors of [11] conducted brake efficiency tests at various vehicle inspection stations in Poland to compare the obtained results. These findings were utilized to formulate a methodology for the technical testing of vintage vehicles. Notably, significant differences were observed in the brake test results across different vehicle inspection stations. The identified reason for this variance was the performance of measurements by different diagnosticians. The study also highlighteddisparities in equipment, the technical condition of measuring tools, and variations in the competence levels of diagnosticians at different vehicle inspection stations. Researchers have proposed a method for diagnosing clutch friction linings, utilizing the work of frictional forces as an indicator for assessing the technical condition [12]. They have also developed a methodology to estimate the service life of friction linings and the expected replacement time for these components. An intriguing observation is the potential correlation between the technical condition of vehicles and the level of exhaust emissions. As presented by the authors of [13], CO and HC emissions increase in the exhaust of cars older than 10 years. It was further noted that in cars surpassing the 10-year mark, the average exhaust emissions exceed permissible limits. The authors hypothesize that, given the average age of cars in Poland exceeding 10 years, a significant proportion of vehicles in the country may be in poor technical condition concerning exhaust emission standards. The results of tests conducted on electronic diagnostic systems fitted in modern cars are detailed in [14]. The objective of the analysis was to assess the suitability of on-board diagnostic systems for evaluating the technical condition of vehicles and efficiently diagnosing faults. It was emphasized that, particularly concerning safety systems, the on-board diagnostic system did not consistently detect faults. In [15], a proposal was made to utilize a dual extended Kalman filter for analyzing current vehicle condition information. Given that active safety systems necessitate the provision and processing of real-time information, which may introduce errors, the authors of [16] underscored the limitations of current solutions. These considerations were validated through simulation on a vehicle model with three degrees of freedom. The accurate and unambiguous assessment of the technical condition of a vehicle is crucial in the work of expert witnesses.