Ford said it would offer a limited-time-only free repair for about 1.4 million SUVs after a wave of public concern about Ford Explorer carbon monoxide leaks.

The company made the announcement Oct. 13. It’s a reversal for the second-largest U.S. automaker, which has insisted that there are no elevated CO levels in nonpolice versions of the popular SUV. Drivers have reported nausea, headaches, and even loss of consciousness.

Ford had previously offered free repairs for the law-enforcement version of the Explorer to fix unsealed holes after the installation of police equipment.

Even as it offered the free repair for regular consumers, Ford insisted Friday that there was no defect and that the vehicles are safe.

Complimentary Service for 'Peace of Mind'

“Our investigation has not found carbon monoxide levels that exceed what people are exposed to every day,” the company, based in Dearborn, Mich., said in a news release. “However, for our customers’ peace of mind, Ford is offering a complimentary service that reduces the potential for exhaust to enter the vehicle.”

The National Highway Traffic Safety Administration has been investigating the alleged carbon monoxide leaks for more than a year, upgrading its probe in late July. NHTSA tests showed that levels of the poisonous gas could be detected in certain driving scenarios, but the agency said it had not obtained any “substantive data or actual evidence” of injuries or crashes directly related to CO poisoning.

Ford had already issued multiple bulletins to its dealers to address exhaust odor, NHTSA said. Ford offered free repairs for the police vehicles the day after NHTSA’s upgraded investigation was announced.

The company stopped short of calling that action a recall, as well.

Consumers can take their 2011 to 2017 Explorer to any Ford dealer for the service starting Nov. 1 but no later than Dec. 31, 2018. Dealers will reprogram the air conditioner, replace the liftgate drain valves, and inspect the sealing at the rear of the vehicles, Ford said. All work will be done free of charge.

The action covers 1.3 million vehicles in the U.S., 84,000 in Canada and 24,000 in Mexico. The reference number for the service is 17N03.

Call the dedicated hotline at 888-260-5575 if you have any questions about your Ford Explorer.