Early cars either had a four speed Ford gearbox or the five speed gearbox derived by Lotus from Austin Maxi components. Later cars used a Getrag five speed gearbox. A three-speed automatic gearbox was optional. The Éclat had disc brakes at the front, and inboard drum brakes at the rear. Air conditioning and power steering were offered as options. The different equipments of the Series 1 cars were called 520, 521, 522, 523, and 524. The 520 has a four-speed transmission, a Ford bolt pattern, steel wheels, and smaller brakes. The remainder of the range have a 114.3 mm bolt pattern, the same disc brakes as the Elite, and GKN alloy wheels. They also received a twin exhaust and various other comfort items such as a clock and a cigar lighter. The 522 added power steering and the 523 also received air conditioning. The 524 is like the 523 but with the automatic transmission. Some other cars were also fitted with the automatic, and Lotus accommodated a variety of changes to the cars. There were also sporty versions of the 520 and 521 called the Eclat Sprint, with a black-and-white paint job, an oil cooler, and a variety of other performance upgrades. Approximately 1,500 examples of the Eclat were produced.
