Toyota Australia dealers will have substantially more new vehicle stock arriving in June and a further increase in July, the company said on Friday.

Sales and marketing chief David Buttner said there had been limited stock in May due to production disruptions around the world in the wake of the 11 March earthquake and tsunami in Japan.

He said the number of vehicles arriving this month from Toyota plants in Japan, Thailand and Australia would be almost double the May level with priority being given to customers who had already placed orders.

"In July we will receive almost the full quota of cars we ordered well before Japan's natural disasters occurred," Buttner said.

"For the rest of the year, our business will basically be back to normal, thanks to a faster than expected pick up in production."

He said Toyota's manufacturing divisions and suppliers had worked frantically to get production back on track more quickly than anyone had expected.

Production in Australia of the Camry line is set to return to pre-quake levels by the end of next week.

Thailand, which produces the HiLux truck, returned to normal production in May and is planning overtime to fill back orders.

In Japan production is expected to return to 90% of pre-quake levels during June and to match last year's output for the full year.

Buttner claimed Toyota Australia had deliberately avoided pursuing sales in May beyond the capacity to supply.

According to VFACTS data for May released today, Toyota remains the overall market leader so far this year with a substantial lead of 22,000 sales.

In May, it led the market in five individual segments, even with depleted stock.