New vs used car: the numbers that debunk the myth of buying new

Buying a new car is throwing money away: the numbers from the used car market

Buying a new car is, in most cases, a bad financial decision. Depreciation is brutal: a BMW 530D that cost €60,000 new can be found with 55,000 km for €32,000, practically half the price. And it's not an isolated case: any car loses between 30% and 50% of its value in the first three years. The second-hand market offers alternatives that, with proper maintenance, can last hundreds of thousands of kilometres without serious problems.

Depreciation: the silent enemy

The main argument against new cars is purely mathematical. A new vehicle loses value the moment it leaves the dealership. According to the examples cited by buyers themselves, a BMW 530D from the last restyling (2011) cost €60,000 new and could be bought in Germany with 55,000 km for €32,000. In other words, a saving of €28,000 on a practically new car. That difference is hard to justify for anyone other than an enthusiast with money to spare.

In addition, the buyer of a new car takes on other hidden costs: more expensive comprehensive insurance, interest if financed, and the loss of value year after year. By contrast, a well-chosen used car can offer a much lower cost per kilometre. Some calculate that a €2,000 used car with €500 in annual repairs works out far more cost-effective than a new €20,000 one.

The reliability myth: engines last, but they need maintenance

One of the most frequently repeated arguments in favour of new cars is their supposedly greater reliability. However, workshop data disproves this idea. Engines such as Mercedes' 220 CDI can exceed one million kilometres with proper maintenance. One taxi driver reached 900,000 km with a single €1,000 repair at 500,000 km. That said, the rest was routine maintenance: clutches, suspension, brakes... Parts that also fail in new cars.

The key lies in maintenance and use. A car with 50,000 km can be in worse shape than one with 200,000 if the former has been mistreated. That's why, when buying second-hand, it's essential to check the service history and, if possible, get to know the seller. Uncertainty is the main risk, but it can be mitigated with a thorough inspection.

The used car market: opportunities and pitfalls

The second-hand market is full of opportunities, but also traps. Experts recommend being wary of cars with low mileage and suspiciously low prices, since odometer tampering is a widespread practice. In Germany, for example, it is heavily penalised, but in Spain not so much. One way to protect yourself is to check the ITV inspection records (Spain's mandatory vehicle roadworthiness test), which should be consistent with the mileage.

Another option is to buy three-year-old cars and sell them before they turn six. This avoids most of the depreciation and takes advantage of the warranty years. For those who drive few kilometres a year, a used car is almost always more cost-effective. For those who drive a lot, a new one may pay off if kept for many years.

The real cost of running a used car

It's not all savings. A used car requires investment in parts that wear out: tyres, battery, shock absorbers, brakes... These costs can add up to several hundred euros a year. On a premium car, parts are more expensive and so are repairs. That's why, before buying, you need to do the maths and set aside an annual maintenance budget.

Even so, the difference compared to a new car remains enormous. A new mid-range car costs between €15,000 and €20,000, while a similar used one can cost €5,000. Even adding €1,000 a year in maintenance, over ten years the used car will have cost far less. The conclusion is clear: a new car only makes sense if it will be used intensively and kept for many years, or if you can afford the indulgence without any trouble.

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The trend seems unstoppable: more and more drivers are turning to the second-hand market. With inflation and rising interest rates, the wallet rules. And the numbers, for now, back those who steer clear of the dealership.