Toyota IQ

The Toyota iQ is a city mini offering a choice of 1.0-litre and 1.33-litre petrol engines.

The list of options on the iQ includes part-leather seats and satellite navigation.

The history of the iQ starts in 2003 with team of Toyota engineers tasked with creating a compact car.

Designers from Japan and Toyota’s European design studio worked together to create a sub-three-metre vehicle. The iQ concept was presented at the 2007 Frankfurt motor show.

The Toyota iQ began production began 2008 at the company’s Takaoka plant in Japan. Sales in the UK and Europe began January 2009. These original models are still a popular vehicle on the used Toyota market.

The Toyota iQ has a 2,000mm wheelbase with 710mm distance between the driver and front passenger seat.

The thickness of the doors is reduced by using a guideless window regulator structure rather than a conventional cross-arm type. The A-pillars are positioned forward and slope back. The front passenger seat can be slid forward. Both rear seats can be folded down to increase boot capacity to 238 litres from 32 litre with both seats in position.

The Toyota iQ’s gearshift and parking brake are almost side by side and there is no fuel tank beneath the rear seats.

A compact air conditioning unit is installed in the Toyota iQ and the heater blower is in the centre of the instrument panel. Thin front seatbacks are included.

The differential is placed in front of the engine in the Toyota iQ reducing the distance from the tip of the bumper to the accelerator pedal by 120mm.

The Toyota iQ has has a central take-off steering gear, positioned higher and further back in the engine bay.

This is achieved by connecting the steering rack tie-rods to the centre of the rack, rather than both ends.

The Toyota iQ has an underfloor petrol tank that is 120mm high. The rear shock absorbers are angled backwards.

Engineers developed a horizontal fuel pump for the Toyota iQ. Fuel suction inlets in both the fuel pump and canister and fuel level indicators are located in the centre of tank. The tank’s 32-litre capacity is gives the iQ a range of about 435 miles.

Toyota created high-tensile seat frames that save 1kg per seat.

The size of the heater and air conditioning unit in the Toyota iQ has been reduced by 20 per cent with a smaller blower fan, re-routing of passages to improve air flow inside the unit and a more compact air filter.

The Toyota iQ’s front suspension has a high caster angle and reduced torsional stiffness and the turning radius is 3.9. metres.

The 1.0-litre VVT-i with manual transmission has a 0.30 drag coefficient.

The Toyota iQ’s torsion beam was lightened saving 3.5kg with another kilo of metal saved by using a cross-shaped rear wheel flange.

The Toyota iQ exhaust weighs in at 6kg using a long tailpipe and a single, low-reonance silencer with no additional sub-silencer.

The Toyota iQ uses a MacPherson strut front suspension with a high, 8.3-degree caster angle for more toe-out when lateral forces are applied.