WASHINGTON (Reuters) - Fiat Chrysler Automobiles NV FCHA.MI will pay more than $700 million to resolve lawsuits from the U.S. Justice Department and diesel owners over claims it used illegal software to allow 104,000 diesel vehicles to emit excess emissions, three people briefed on the matter said on Wednesday.

FILE PHOTO: A Fiat Chrysler Automobiles (FCA) sign is seen at its U.S. headquarters in Auburn Hills, Michigan, U.S. May 25, 2018. REUTERS/Rebecca Cook

Fiat Chrysler will pay $311 million in civil penalties to U.S. and California regulators, about $75 million to states investigating the excess emissions and additional funds to offset excess emissions from the older cars. It will also pay $280 million to settle a lawsuit by owners, the sources said.

Fiat Chrysler has denied any wrongdoing and previously said there was never an attempt to create software to cheat emissions rules. In October, the company set aside 713 million euros ($815 million) to cover potential costs related to the case.

Separately, Robert Bosch GmbH [ROBG.UL], a German auto supplier that made some components for the Fiat Chrysler diesel engines, is expected to announce it will settle suits from U.S. owners for $30 million, one person said.

The settlements are set to be announced on Thursday at the Justice Department. Fiat Chrysler, Bosch and the Justice Department declined to comment.

The Environmental Protection Agency issued a media advisory Wednesday that said it would make an “announcement of a significant civil action to address cheating on federal auto-emissions tests.”

The Justice Department sued Fiat Chrysler in May 2017, accusing it of illegally using software that led to excess emissions in 104,000 U.S. diesel vehicles from the 2014-2016 model years.

Fiat Chrysler won approval from U.S. regulators in July 2017 to sell diesel vehicles with updated software. The company has repeatedly said it hoped to use that software to address agencies’ concerns over the 2014-2016 vehicles.

The company is not expected to make any hardware changes to the vehicles and the fix will not impact the vehicle’s fuel economy, two people said.

Owners of those vehicles are expected to get an average of $2,800 each for completing the software updates, the sources said. Fiat Chrysler will formally issue an emissions recall for the vehicles, but will not offer to buy back the vehicles, the sources said.

The Justice Department in 2017 said Fiat Chrysler used auxiliary emissions controls in diesel vehicles that led to “substantially” higher than allowable levels of nitrogen oxide, or NOx pollution, which is linked to smog formation and respiratory problems.

U.S. and California regulators stepped up scrutiny of diesel vehicles after Volkswagen AG VOWG_p.DE admitted in 2015 to illegally installing software in U.S. vehicles for years to evade emissions standards.

VW has agreed to pay more than $25 billion in the United States for claims from owners, environmental regulators, states and dealers. Regulators have also been probing diesel emissions in Daimler AG's DAIGn.DE U.S. Mercedes Benz vehicles.

VW also paid $4.3 billion in 2017 in U.S. civil and criminal fines and pleaded guilty to three criminal felony counts to resolve the Justice Department’s investigation.

Fiat Chrysler still faces an ongoing criminal investigation by the Justice Department.

Fiat Chrysler sells two U.S. diesel models and plans to add two new Jeep SUV diesel models by 2020.