Japanese parts giant Denso's "fuel pump door" drags down Toyota and other automakers' recall

The continuous fermentation of the "fuel pump door" has attracted attention to the supply chain of Japanese automakers.
   Recently, the fuel pump produced by Japanese parts giant Denso (DENSO) failed, which may cause safety risks such as engine stalls. A report from Japan’s KIMURA SECURITIES shows that as of July 2020, the “fuel pump door” has triggered the recall of nearly 4.8 million Japanese car companies in major global markets including China, the United States, and Canada, of which only A Toyota car company affected 3.2 million vehicles.
  According to local Japanese media reports, official agencies in Japan and many countries around the world are still investigating the incident.
   Comprehensive multi-analysis, the main reason for the "fuel pump door" is that the resin used to protect the fuel pump is not dense enough, which may cause the fuel engine to expand or deform, causing the fuel pump to fail to function properly. Liu Miao, a teacher at the School of Automotive Engineering of Shanghai University of Engineering Science, analyzed to a reporter from China Business News that the fuel pump, as a basic part of the automobile fuel injection system, plays a role in connecting the gasoline tank and the engine, and affects whether the car can start normally. According to the information, the “oil pump door” of this wheel is mainly caused by the resin density used for protection of the oil pump impeller does not meet the design standards. If the density does not meet the standards, the engine oil pump will seep into the sundries and make the car unable to start normally.
"Under normal circumstances, the density and uniformity of coatings are both important aspects of quality inspection. If the public information is true, it can be considered that there are problems in both the production and quality inspection links. This is very important for Japanese car companies that are well-known for quality control. Rare." Liu Miao thought.
   A reporter from China Business News asked Denso about the specific cause of the accident, but as of the time of publication, no reply was received. However, a person in charge of a South Korean spare parts company who requested anonymity told the CBN reporter that the problem similar to the impeller resin density is a “low-level error”. As long as you are more careful in the testing and QC links, it is not difficult to find the problem. high.
"Whether the resin is evenly coated, whether the density is normal, or can even be directly observed with the naked eye is a problem of visibility. Even many companies with ordinary technical skills can find the problem. This kind of low-level error occurs in established companies like Denso. Unbelievable, either too careless, or deliberately ignored." The person in charge thinks.
It is worth noting that on April 17, when the Defective Product Management Center of the State Administration for Market Regulation issued a recall announcement on the "fuel pump valve", it stated that 256,644 vehicles will be recalled in the Chinese market, covering GAC Toyota, FAW Toyota, and imported Toyota. And more than ten models under Lexus, of which 213,000 are Toyota and 43,000 are Lexus. Toyota and Lexus also account for the majority of recalls involving "fuel pump doors" in other countries.
According to public information, Denso was formerly a spare parts supply department of Toyota Motor Corporation of Japan. It was independent from Toyota in 1949. It has now become Japan's largest auto spare parts supplier and the world's second largest auto spare parts supplier in terms of market value. Major global auto companies, including Japanese auto companies, supply major auto parts such as fuel pumps, engines, and power systems.

 In recent years, Japanese parts companies have been caught in scandals. Mitsubishi Materials, Kobe Steel and Toray have successively fallen into scandals of forging or concealing safety hazards, and TAKATA’s “airbag door” has triggered nearly 100 million vehicles worldwide. The car recall has become the world's largest car recall incident and directly affects the credibility of the Japanese car supply chain.
According to the list of the top 100 global auto parts companies in 2019 released by "Automotive News", Japanese companies still occupy the most seats, but there are 6 less companies than the previous year; while the Chinese companies on the list are from the previous Increased from 6 in the year to 8. Otawara believes that due to the long-term high pursuit of stability in the Japanese automotive supply chain, major parts companies have less market pressure and can maintain stable quality. However, in recent years, as market pressure continues to increase, competition among global auto parts manufacturers has intensified , Financial, technical and other pressures caused Japanese parts companies to collectively fall into "anxiety."
It is worth noting that, according to the Nikkei, this problematic fuel pump began to enter the market in 2013. In 2016, Denso found a safety hazard for the first time through an internal inspection report, but it was not until 2019 that it passed internal disclosure. People were exposed. Some insiders attribute the crisis of Japanese spare parts companies to the lag of Japan's local legal system. Toichiro Hironaka, who served as the Japanese defense lawyer for Ghosn, former chairman of Nissan Motor Company, told CBN reporters that Japan’s legal standards for safety responsibilities of auto parts companies are relatively backward compared with major markets such as Europe, America and China.