The German car giant said it had recalled 312,000 vehicles, including BMW 1 Series, 3 Series, the Z4 and its X1 petrol and diesel models made between March 2007 and September 2011.
BMW had initially recalled 36,410 petrol cars in April 2017 over safety issues.
The most recent recall comes after an investigation by the BBC’s Watchdog programme.
BMW said: “We now recognise that there may have been some cases of similar power supply issues in vehicles not covered by the original recall.
“In order to reassure customers with concerns about the safety of their vehicles, we are voluntarily extending the recall.
“We are therefore announcing today that we will take the proactive step of expanding the existing UK recall to cover all vehicles potentially affected by the power supply issues.”
Following the recall confirmation, the Driver & Vehicle Standards Agency (DVSA) criticised BMW’s failure to provide timely information on its faulty vehicles, saying the company had not made the agency aware of 19 cases of electrical failure between 2011 and 2014, as it is was required to do.
“It then provided us with incorrect information about the faults, so we were not able to make an informed decision,” the DVSA said.
“However, after examining the growing evidence, DVSA contacted BMW in December 2016 to ask it to conduct a full safety recall of the affected vehicles.
“At present we are handling 417 recalls involving more than 2.9 million vehicles under the code of practice agreed with industry. We keep our approach to safety recalls constantly under review to ensure we are able to respond, more quickly, to emerging issues and prioritise activities where they are most needed.”
The DVSA contacted BMW in December asking the car maker to conduct a full safety recall of around 370,000 cars affected by an electrical fault. BMW finally agreed to recall the vehicles on 10 April 2017.
More from Business
Companies face action for failing to reveal pay gaps
Vodafone snaps up Liberty Global’s European operations for €18bn
How business could be hit by Iran deal pull-out
Funding Circle hires first female NED ahead of £2bn float
Greggs share plunge after ‘Beast from the East’ profit warning
Walmart buys $16bn stake in India’s Flipkart
The DVSA does not currently have the power to order a recall itself, and can only to ask the manufacturer or distributor to do so.
The agency said it was looking at strengthening its enforcement powers.