There’s no bigger nightmare than owning a car that spends more time at the mechanics than on the road. Reliability is one of the critical factors when choosing a car, so when you’re looking for a daily driver, it should be among your most important criteria. In this article, we will address some of the least reliable cars on the used market. Of course, we’re not going to include supercars and other performance cars of the sort. Those machines weren’t made for everyday commutes, and their maintenance routines are entirely different. 

1. Range Rover

While Land Rover’s luxurious off-roader is among the best for conquering trails, a vast array of electrical components and expensive maintenance items put it on our list of least reliable cars out there. In addition to electrical problems, a vast number of Range Rovers also suffered from axle and suspension issues.

Given that Range Rover has fantastic off-road abilities when it works properly, these faults seem a bit ironic, don’t they? Repair bills for a car like this are likely to be very costly even for lesser breakdowns, so you should probably avoid it unless you have a Land Rover approved warranty!

2. Mini Cooper

When it comes to compact cars, it seems like Mini can’t keep up with the rest of the group when it comes to reliability. Many consumers have reported a wide array of problems, ranging from ignition coil failures to fuel tank leaks and various engine issues. As the list will show, many unreliable cars tend to be more expensive to buy new and filled with electronics and complicated systems. The Mini doesn’t really fit that pattern!

Still, it’s one of the least reliable used cars out there, so you make sure you get a good one to avoid disappointment. Even then, be prepared.

3. Mercedes-Benz SL

The 2000s Mercedes-Benz SL is among the most complicated cars of the era with features like a 6.0-liter V12 engine and electric hardtop as its defining selling points. These “wow factor” dream features are usually a nightmare for used buyers!

As a used car, the SL proved to be quite problematic, with V12 engines suffering from eye wateringly expensive reliability issues. V8-powered versions are a bit more reliable, but whatever goes wrong, you’ll be faced with costly ($$$$) bills. Ouch.

4. Mercedes-Benz CL

To continue with the three-pointed star, the Mercedes-Benz CL was also a technological marvel back when it was new. Today, however, its one of the least reliable used luxury cars. As with the SL, the CL should be avoided for its 6.0 liter V12, but you should expect it to suffer from electronics issues too.

The repair costs are also astronomical, so if you really want one, make sure to pay extra bucks for recently serviced examples. Do NOT buy this car, thinking it will be cheap. You will seriously wish you hadn’t before long. 

5. Audi A6 Allroad

Audi is generally among the most trustworthy brands worldwide, with cars like A4 and A6 topping many reliability tests as winners in their respective classes. On the other hand, the lifted and beefed up A6 Allroad is one of the least reliable used cars, likely due to the increased complexity of the model. The beefed-up ride height of the Allroad required complex air suspension, and I’m sure you can guess what happens to that when it gets old!

As well as this is, it’s likely that the Allroad gets subjected to more abuse than the usual A6, due to its rugged persona. In short, people offroading a car that really shouldn’t be offroaded!

6. Tesla Model X

Even though Teslas are regarded as the peak of technology when it comes to cars, this electric-powered family car hasn’t been able to deliver in the reliability department. As with any brand new company or technology, you’re probably not going to get the best product they will ever make.

Some flaws include panel gaps, poor paint quality, and faulty aircon systems. If you bought the car new, you’re gonna be fine as Tesla warranties are excellent. If you’re buying one used without an official warranty, Stay the heck away! Sure, a few rough edges don’t sound like much of a problem but wait until these cars to get a bit older. Then, the real fun should start when all other flaws come to the surface.

We can’t blame anyone for these issues. Elon Musk and Telsa have done amazingly well in pushing the tech forward, but as with all new tech, the first versions are rarely perfect! The new ones are much better in basically every way.

7. Porsche 911

The claim that the Porsche 911 can be unreliable is a controversial one, but hear us out. Yes, it is a reliable car compared to others in the class, but it can still suffer from many reliability issues. In all honesty, many of them are related to neglecting regular maintenance, because even the most straightforward routine checks can be very costly.

As Porsches age, the subsequent owners, tend to skip these expensive procedures, and when something breaks down, the bills keep getting higher. Some 911s suffer from rod bearing issues, but increasingly for the 996 generation, rust is now becoming an issue. Because of this, you should remember that there is no such thing as a cheap Porsche.

I would buy one with an official warranty or perhaps get to know your local Porsche specialist first!

So there you are. Am I wrong? What ridiculously unreliable cars did I miss? Let me know in the comments.