28.01.2022 – 08:54
TÜV Association e. V
+++ Results of the HU depend on the respective model +++ Special evaluation of the TÜV report from BMW i3, Renault Zoe, Smart Fortwo Electric Drive and Tesla Model S +++ Risk of corroding brakes in electric cars +++ TÜV association requires official test specifications for charging cables and batteries +++
In their first main inspection (HU) after three years, electric vehicles perform poorly overall. This shows a special evaluation of the HU results of the TÜV association of the four most popular electric cars of the past years BMW i3, Renault Zoe, Smart Fortwo Electric Drive and Tesla Model S As with other drive types, the result of the safety check depends on the model in question,” says Dr. Joachim Bühler, Managing Director of the TÜV Association. “For the first time, enough electric cars drove up to the TÜV test centers to be able to make a preliminary assessment of the technical safety of the vehicles.” The benchmark for the assessment is the “TÜV Report 2022”, which includes the results of 9.6 million tests by the TÜV organizations. Among the 2 to 3-year-old vehicles with combustion engines, the proportion of cars with “significant defects” is 4.7 percent on average. Cars with significant defects fall through the main inspection and have to be presented again after the repair before they receive the coveted general inspection sticker.
Of the four electric vehicles considered, the electric Smart Fortwo came out on top with a defect rate of 3.5 percent. In the list of 128 2- to 3-year-old combustion engines listed in the TÜV report, the E-Smart would end up in the first third. It is followed by the BMW i3, which hits the short cut with 4.7 percent and would rank in the second third. In addition to defective low beams, defects in the brake discs are often noticed in the i3. “Problems with the brake components are typical for e-vehicles, since they are used much less frequently than combustion engines and therefore corrode more frequently,” says Bühler. The reason is the recovery of braking energy (recuperation) when the driver takes their foot off the accelerator and the e-vehicle automatically decelerates. Bühler advises: “Owners of e-cars should apply the brakes every time they drive and service them regularly.” The popular Renault Zoe would end up in the last third with a defect average of 5.7 percent. In addition to defective or incorrectly adjusted headlights, the Zoe has an above-average number of defects in the axle suspension. The Tesla Model S performs worst in the quartet. With a defect rate of 10.7 percent, every tenth Tesla Model S fails the first general inspection and would also end up in the last third of the 128 combustion engines. Only the Dacia Duster and the Dacia Logan would rank behind the Tesla. In addition to defects in the fog light and the low beam, the Model S at the HU mainly has problems with the wishbones.
The regulations for the main inspection already contain individual inspection points that allow the traffic safety of e-cars to be checked. “For electric vehicles, there are test specifications at the HU that are taken into account by the experts,” says Bühler. In addition, the examiners have vehicle-related test instructions at their disposal. In electric cars, for example, the attachment of the high-voltage battery, the condition of the insulation and the cables, connections and plugs are checked. If the charging cable is available, easy plugging and unplugging of the plug from the charging cable is checked. The function of the immobilizer is also checked when the charging cable is connected. “The charging cable itself has not yet been tested because there is no obligation to carry it,” says Bühler. “An obligation to carry charging cables would first have to be anchored in law before they can be checked at the HU.” The battery, as one of the most important components of e-cars, is currently only subjected to an expert visual inspection.
Methodology note: For the TÜV Report 2022, around 9.6 million main inspections of passenger cars that were carried out between July 2020 and June 2021 were evaluated. The used car guide shows 222 vehicle models in 5 age groups. 128 vehicle models are listed in the ranking of 2 to 3 year old passenger cars. The four electric cars considered are not yet included in the TÜV report because they have only been sold in significant numbers in Germany for a few years. The information is based on 1142 main inspections of the BMW i3, 1939 of the Renault Zoe, 1645 of the Smart Fortwo Electric Drive and 812 of the Tesla Model S. On this basis, a preliminary assessment of the technical safety of the respective vehicle models is possible.
More information at: www.tuev-verband.de/pressemitteilungen/tuev-report-2022
About the TÜV Association: The TÜV Association e. V. represents the political and professional interests of its members in politics, administration, business and the public. The association is committed to technical and digital security for products, systems and services through independent tests and qualified further training. With its members, the TÜV Association pursues the goal of maintaining the high level of technical security in our society and creating trust in the digital world.
Original content from: TÜV-Verband e. V., transmitted by news aktuell