Toyota Halts Shipments Amid Certification Issues with Diesel Engines

Toyota Motor Corp. has announced a temporary suspension of shipments for 10 vehicle models. This decision follows a revelation by supplier Toyota Industries Corp. of certification problems with some diesel engines.

During an internal investigation, irregularities were discovered in horsepower-output testing. It was found that the test engines operated on software different from the mass production version. This discrepancy led to reduced variation in horsepower values, according to a statement by the car manufacturer.

The certification issue adds to a recent series of challenges for Toyota. Last month, subsidiary Daihatsu Motor Co. reported that many of its vehicles were not adequately tested for collision safety and that test results had been manipulated, dating back to 1989. Consequently, Daihatsu has ceased shipments and suspended operations through at least February.

Koji Sato, CEO of Toyota, acknowledged the need for a management system that incorporates feedback from workers on the ground. He recognized that data fabrication and communication issues are present at the company’s subsidiaries.

The production of the implicated models has been halted immediately in Japan, with a stoppage of manufacturing for affected overseas models commencing from Tuesday. Sato mentioned that the auto industry’s significant transformation requires new approaches to challenges and technology.

Bloomberg Intelligence Senior Analyst Tatsuo Yoshida commented that these issues could adversely affect both Toyota Industries and the wider Toyota group.

The investigation at Toyota Industries initially focused on forklift engine certifications but expanded to construction machinery engines and car diesel engines. The probe identified irregularities in horsepower-output testing for three engine models, impacting 10 car models worldwide, including the Land Cruiser Prado and Hilux.

Hiroshi Inoue, chair of the Special Investigation Committee, stated that these issues occurred to prevent delays in mass production, with higher management bearing responsibility.

Koichi Ito, President of Toyota Industries, cited insufficient communication with Toyota Motor, particularly after a surge in orders from 2017. He plans to improve communication with the parent company, though the financial impact of the scandal is yet to be determined.

Japan’s transport ministry is set to begin on-site inspections from Tuesday. Toyota’s statement emphasized a commitment to supporting Toyota Industries in rebuilding efforts and ensuring that safety and quality are prioritized.

Furthermore, Toyota faces additional scrutiny as another subsidiary, Hino Motors Ltd., acknowledged emissions data falsification in August. CEO Sato reflected on these incidents, suggesting a need for better understanding and respect in certification processes.



  • Sam

    Sam focuses mainly on researching and writing the growing database of Car Facts articles on Garage Dreams, as well as creating interesting list content. He is particularly enthusiastic about JDM cars, although has also owned numerous European vehicles in the past. Currently drives a 3rd generation Suzuki Swift Sport, and a Volkswagen Touareg (mainly kept for taking his border collie out to the hills to go walking)

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