## 3 Results
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Brand** & **Front Breaking** & **Rear Breaking** & **Front Pressure** & **Rear Pressure** & **Milleage per Year** \\  & **Difference (\%)** & **Difference (\%)** & **Difference (\%)** & **Difference (\%)** & **(km)** \\ \hline \multirow{4}{*}{VW (\(n=158\))} & 8.32 (6.76) & 12.99 (10.88) & 7.56 (11.51) & 8.99 (13.94) & 13,883 (6422) \\  & 0.0–43.24 & 0.0–58.82 & 0.00–85.71 & 0.00–100.00 & 308–38,420 \\  & 6.90 & 10.26 & 4.65 & 4.49 & 12,593 \\  & [7.27; 9.39] & [11.29; 14.70] & [5.76; 9.37] & [6.80; 11.18] & [12,874; 14,892] \\ \hline \multirow{4}{*}{Opel (\(n=115\))} & 7.00 (6.03) & 13.40 (11.84) & 8.76 (13.22) & 6.96 (8.97) & 10,862 (4688) \\  & 0.0–29.06 & 0.0–56.41 & 0.00–104.76 & 0.00–50.00 & 2420–30,126 \\  & 5.71 & 10.53 & 4.88 & 4.44 & 9832 \\  & [5.88; 8.11] & [11.21; 15.58] & [6.32; 11.20] & [5.30; 8.62] & [9996; 11,728] \\ \hline \multirow{4}{*}{Ford (\(n=88\))} & 7.16 (7.51) & 9.80 (8.38) & 9.74 (20.74) & 8.31 (10.78) & 15,237 (7391) \\  & 0.00–40.82 & 0.0–34.48 & 0.00–175.33 & 0.00–50.00 & 1195–43,506 \\  & 4.82 & 7.70 & 4.65 & 4.88 & 14,368 \\  & [5.57; 8.75] & [8.03; 11.57] & [5.34; 14.13] & [6.03; 10.60] & [13,671; 16,803] \\ \hline \multirow{4}{*}{Toyota (\(n=72\))} & 6.40 (6.34) & 11.71 (12.02) & 5.44 (10.58) & 5.29 (7.30) & 10,394 (4608) \\  & 0.00–28.04 & 0.00–57.14 & 0.00–72.73 & 0.00–32.26 & 2165–26,071 \\  & 4.20 & 9.11 & 4.09 & 4.26 & 9557 \\  & [4.91; 7.89] & [8.89; 14.54] & [2.96; 7.93] & [3.58; 7.01] & [9312; 11,477] \\ \hline \multirow{4}{*}{Renault (\(n=68\))} & 7.87 (6.63) & 12.00 (9.88) & 10.43 (13.68) & 10.26 (14.89) & 10,934 (4991) \\  & 0.00–28.57 & 0.00–40.00 & 0.00–70.59 & 0.00–66.67 & 101–36,940 \\  & 5.77 & 10.53 & 5.13 & 5.13 & 10,557 \\  & [6.26; 9.47] & [8.89; 14.54] & [7.11; 13.74] & [6.66; 13.87] & [9312; 11,477] \\ \hline \multirow{4}{*}{Peugeot (\(n=59\))} & 9.27 (9.01) & 12.62 (14.59) & 7.62 (11.22) & 9.28 (13.41) & 13,512 (7041) \\  & 0.00–37.24 & 0.00–93.33 & 0.00–62.86 & 0.00–81.48 & 1977–44,618 \\  & 7.14 & 8.00 & 4.88 & 4.88 & 12,622 \\  & [6.92; 11.62] & [8.81; 16.42] & [4.69; 10.54] & [5.79; 12.78] & [11,678; 15,348] \\ \hline \multirow{4}{*}{Flat (\(n=53\))} & 8.13 (6.92) & 26.02 (34.89) & 11.80 (19.35) & 7.99 (9.81) & 8710 (6448) \\  & 0.00–26.09 & 0.00–100.00 & 0.00–103.03 & 0.00–42.86 & 1185–31,096 \\  & 5.00 & 16.22 & 5.13 & 5.41 & 6731 \\  & [6.23; 10.04] & [16.41; 35.64] & [6.47; 17.14] & [5.28; 10.69] & [6932; 10,487] \\ \hline \multirow{4}{*}{Other (\(n=454\))} & 7.03 (6.30) & 12.85 (14.17) & 7.02 (13.24) & 6.66 (9.93) & 12,650 (6565) \\  & 0.00–43.90 & 0.00–100.00 & 0.00–165.22 & 0.00–63.41 & 197–41,993 \\ \cline{1-1}  & 5.71 & 10.72 & 4.44 & 4.44 & 11,651 \\ \cline{1-1}  & [6.45; 7.61] & [11.54; 14.16] & [5.80; 8.24] & [5.75; 7.58] & [12,045; 13,256] \\ \hline \multirow{2}{*}{\(p\)-value} & 0.1536 **1** & **0.0069 ** & **0.0578 ** & **0.0000 ** & **0.0000 ** \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Breaking difference, pressure difference, mileage per year. Figure 6: Breaking force difference in % for rear axle of 1067 cars. Figures 9 and 10 illustrate the pressure differences between the front and rear wheels. It can be seen that, in most cases, these differences do not exceed 25-30%, while there are isolated situations where the pressure difference is more than 100%. The lights were adjusted in a total of 469 cars (44.0%), with correct adjustment identified in 598 vehicles (56.0%). It is advisable to check and, if necessary, correct the lighting on every car maintenance occasion. Notably, for 1031 vehicles (96.6%), no instances of corrosion or corrosion perforation in chassis components were registered. Regarding oil leaks, none were detected in 911 vehicles (85.4%). Efficient lighting, concerning the operation of  
Figure 8: Difference pressure, front (%) (mean (SD)). Figure 10: Pressure difference for tire rear axle of 1067 cars (%). Figure 9: Pressure difference for tire front axle of 1067 cars (%). exterior lamps, was observed in 1011 vehicles (94.5%).