The war on diesel engines continues, as Reuters is reporting the Germany Transport Ministry wants to recall millions of diesel-powered vehicles.

Citing sources familiar with the matter, the publication says the Transport Ministry is in talks with several different manufacturers about recalling approximately 12 million vehicles. There’s no word on which models are being targeted, but the campaign is said to involve vehicles with diesel engines that are meant to comply with Euro-4, Euro-5, and Euro-6 emission standards.

The recall aims to have the vehicles equipped with updated engine management software and is part of the government’s plan to cut nitrogen oxide emissions by around 25 percent.

Details remain elusive, but the report claims the government wants the automakers to cover the cost of the recall, which is estimated at €1.5 to €2.5 billion ($1.68 – $2.8 billion), and to present their solutions for cutting emissions before the elections that will take place on September 24.

The news comes hot on the heels of reports that several German cities are eyeing a ban on diesel-powered vehicles. Both Munich and Stuttgart are reportedly considering measures that would prevent diesel models from entering the city on certain days.

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