The UK motor industry has restated its view that staying in the European Union is best for its business and best for British jobs, ahead of tomorrow's referendum on the UK's membership of the EU.

The Society of Motor Manufacturers and Traders (SMMT), which represents the UK automotive industry, wants to ensure there is absolute clarity on the sector's position given recent 'misrepresentations' in the Europe debate.

The industry is a huge employer, supporting 800,000 jobs across the UK and contributing £15.5bn annually to the economy. It has emerged from the recession stronger, more productive and more competitive and is now a leading global player, with exports at record levels and vehicle production at the highest level for over a decade.

The industry is export led with around 80% of vehicles heading abroad and 57.5% of those destined for the rest of the EU.

Unrestricted access to the world's largest single market, the negotiating strength of the EU to secure international trade deals, the ability to shape technical regulations and free movement of labour all provide significant benefits to UK businesses. This is why SMMT member companies, large and small, are overwhelmingly in favour of remaining in the EU.

Before the start of the campaigning period, SMMT commissioned a survey of its members – which includes car and commercial vehicle manufacturers, parts suppliers, aftermarket companies and other companies, large and small.

An overwhelming majority of 77% of companies surveyed said remaining in Europe would be the best for their business, with only 9% saying leaving would be best. No large company said an exit would be in its best interests.

Mike Hawes, SMMT chief executive, said: 'UK Automotive is globally competitive, securing record levels of investment, creating tens of thousands of jobs annually and exporting to over 100 countries. We want this success to continue rather than jeopardise it by increasing costs, making our trading relationships uncertain and creating new barriers to our single biggest and most important market, Europe.

'Remaining will allow the UK to retain the influence on which the unique and successful UK automotive sector depends.'

He said there should be no ambiguity about the sector's views ahead of such a critical vote.

Senior figures from a wide range of UK-based automotive companies have reinforced this message.

Ken Gregor, chief financial officer of Jaguar Land Rover, said: 'Remaining in the EU – our largest market – will increase Jaguar Land Rover's chances to grow, create jobs and attract investment in future technologies. Our European supply chain has been fundamental in helping us to meet customer expectations worldwide and achieve sustainable, profitable growth.'

Toyota has also come out in support of the Remain campaign, using an open letter to tell employees that 'continued British membership of the EU is best for our operations', and that the company 'would face significant business challenges as a result of a decision to withdraw from the EU'.

The Japanese company, which has factories in Derbyshire and Deeside, claimed that leaving the EU could lead to a duty of 'as much as 10% for cars', which would lead to 'either huge cost reduction challenges for us or more expensive cars for our customers'.

Tony Walker, deputy managing director of Toyota Motor Manufacturing UK, said: 'After considered review, we believe that continued membership of the European Union is best for our business and for our competitiveness in the longer term.'

Dr Ian Robertson, member of the board of management of BMW AG, said: 'We firmly believe Britain would be better off if it remained an active and influential member of the EU, shaping European regulations which will continue to impact the UK whatever the decision on Thursday.'

Rory Harvey, managing director and chairman of Vauxhall, said: 'We are part of a fully-integrated European company where we benefit from the free movement of goods and people. We believe not to be part of the EU would be undesirable for our business and the sector as a whole.'

Nigel Stein, chief executive of components giant GKN, said: 'We see a real benefit in remaining in the EU. A vote to leave will not mean manufacturing investment disappears overnight but, over time, a UK outside the EU will be disadvantaged and will lose the investment it needs to maintain our industries.'

Gamil Magal, group chief executive of Magal Engineering, a medium-sized components supplier, said: 'Full unhindered access to the European single market is essential for Magal Engineering's UK operations and growth.'