Up to 1,800 production jobs could go at Jaguar Land Rover if workers do not agree to a pay freeze and a new round of cutbacks.
Workers have been told shifts will have to be cut further and pay frozen to help the company through the severe downturn, reports BirminghamMail.net.
Unions have been presented with a range of cutbacks, including 500 voluntary redundancies, to prevent more job losses at the firm's Solihull and Castle Bromwich sites.
However if they cannot reach agreement, it is believed up to 1,800 jobs could go across JLR, making it the company's biggest loss so far since the recession hit.
Unions are thought to be speaking to the workforce before any agreement is reached.
Last week JLR shed 450 jobs, while in November 850 agency staff were laid off.