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Audi to Revise Engine-Management Software for V6 TDI Diesel Engine

Strategic Insights

— 1 min read

Audi will revise and resubmit for US approval certain parameters of the engine-management software used in the V6 TDI 3-liter diesel engine, following discussions with the US Environmental Protection Agency (EPA) and the California Air Resources Board (CARB). The updated software will be installed as soon as it is approved by the authorities. This move comes after a notice of violation was issued on November 2, stating that Auxiliary Emission Control Devices (AECDs) were not sufficiently described and declared in the application for US type approval.

Key Takeaways:

  • Audi will revise and resubmit engine-management software for the V6 TDI 3-liter diesel engine to comply with US regulations.
  • The updated software will address three Auxiliary Emission Control Devices (AECDs) that were not declared in the original application.
  • One of the AECDs is classified as a defeat device under US law, which involves software for temperature conditioning of the exhaust-gas cleaning system.
  • The company has agreed to cooperate transparently and fully with environmental authorities to find quick, uncomplicated, and customer-friendly solutions.
  • The sales stop for models with the V6 TDI diesel engine will be extended until further notice.
  • The affected models, including Audi A6, A7, A8, Q5, and Q7 from model year 2009 onwards, as well as Volkswagen's Touareg and Porsche's Cayenne since model year 2013, are safe and roadworthy.

Statistics:

  • Estimated expense: mid-double-digit millions of euros.
  • Affected brands: Audi, Porsche, and Volkswagen.
  • Affected models: Audi A6, A7, A8, Q5, and Q7 from model year 2009 onwards, as well as Volkswagen's Touareg and Porsche's Cayenne (since model year 2013 for Cayenne and from 2007 for Touareg).
  • Notice of violation issued on: November 2.
  • Date of discussion with EPA and CARB: Not specified.
  • Number of AECDs not declared: Three.
  • Types of AECDs: Temperature conditioning of the exhaust-gas cleaning system, avoidance of deposits on the Ad-Blue metering valve, and HC poisoning of the SCR catalyst with unburnt hydrocarbons.

Sources:

  • "Audi to Revise Engine-Management Software for V6 TDI Diesel Engine". Contify.com, 23 Nov. 2014.

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