* EU new car sales fall 18.6 percent in July - ACEA
* EU new car sales fall 12.9 percent in August
* EU new car sales down 3.5 percent in first eight months (Adds details from statement)
PARIS, Sept 16 (Reuters) - Sales of new passenger cars saw "considerable percentage drops" over the summer months, industry association ACEA said on Thursday, as the phasing out of scrapping incentive schemes continued to take its toll. Government-backed scrapping schemes boosted demand last year for carmakers hit by the crisis, but these have either finished or are running out, leaving makers with doubts about the latter part of 2010.
Sales in the EU member states -- data for Cyprus and Malta are not available -- fell 18.6 percent in July, ACEA said, reflecting double-digit sales falls in major markets including France, Germany, Spain, Italy and the UK.
In August, traditionally a month with lower registrations, sales fell 12.9 percent in the region.
In the first eight months of the year, registrations were down 3.5 percent, at 9,021,703 units, compared with a period last year when scrapping schemes were in force in many markets.
French manufacturers Renault and PSA Peugeot Citroen saw sales falls in August, with Renault group sales down 7.5 percent and PSA group sales falling 13.7 percent.
Opel and Vauxhall sales fell 14.9 percent in August, while Ford saw a 21.1 percent year-on-year drop.
Italy's Fiat August group sales fell 24.2 percent.
Volkswagen, Europe's biggest carmaker, saw an 11.1 percent drop in August group sales. (Reporting by Helen Massy-Beresford; Editing by Will Waterman)