The hideous car in the photo is a mash-up of the UK’s least reliable cars according to automotive specialist Warranty Direct. Dubbed “Horrific 40RR0R”, it’s the UK’s nightmare car, as it costs an average £550 when it breaks down every other month.

Warranty Direct analyzed its 50,000 live policies to create this car from hell, combining the worst-performing cars from each of the categories measured by the company’s Reliability Index.

Horrific 40RR0R features the suspension of the Audi RS6, the gearbox of the Jeep Grand Cherokee, the electrics of a Mercedes-Benz R-Class, and (quite shockingly) the engine of a BMW M5 (the V10-powered model). The fictional vehicle also features the brakes of a Fiat Multipla, the air conditioning system of a Seat Alhambra and the steering system of a Chrysler 300C.

According to Warranty Direct data, almost two in every five Audi RS6s require a trip to the workshop to repair axle and suspension components each year, while three in every ten Mercedes-Benz R-Class vehicles suffer electrical faults.

More than one in ten Jeep Grand Cherokees report gearbox problems annually, while a quarter of BMW M5s require engine repairs. The same proportion of Fiat Multiplas experience braking system faults, while more than 10 percent of Chrysler 300C sedans require repairs to their steering systems. The same number of Seat Alhambras need their air-con fixed during a typical year.

The Reliability Index calculates the trustworthiness of vehicles by measuring average cost of repair, frequency of failure, age and mileage. While an average car scores 100 in the Index, with the lower the score the better, the Horrific 40RR0R would be five times more unreliable, with an RI figure of almost 500.

According to the Reliability Index, two in five vehicles need some form of repair each year, with average repair costing just over £350. However, some garage bills can reach painful levels, as high as £35,000.

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