The earliest recording of reliability ratings dates back to 1952 when Consumer Reports provided such reporting. For a few decades, they were the only publication providing such information, with many other expert organizations quoting the Consumer Reports ratings for vehicles. Since that time, a few other organizations, such as J.D. Power, Cars.com, Edmunds, and Kelly Blue Book, have added variations of reliability ratings for vehicles.The decade that began the current century was filled with reliable cars that could easily carry a family of five wherever they wanted to go. And while SUVs and pickups rule the streets now, sedans were the most popular segment in the naughties, and some of the names we still know and admire today were going strong, such as the Honda Accord, Toyota Camry, BMW 3 Series, and Mercedes-Benz E-Class. While most people know these cars, some near-bulletproof sedans from the 2000s have been completely lost to time or forgotten by most people.The 2000s sedans on this list are not only extremely reliable and most are still on the roads today, but they're also great nameplates worth knowing about if you're in the market for something well-built and unique.When researching the reliability of the cars on this list, HotCars consulted trusted sources that post user reviews and scores, including Carsurvey.org, Cars.com, and Edmunds. This list is sorted by reliability scores from lowest to highest using specifically Cars.com reliability scores, graded from 0 to 5/5, with higher being better. 2005 Hyundai XG350 Reliability Rating: 3.9/5.0 large-4049-2004hyundaixg350-1.jpgWhen you want a mainstream car with upscale features, the 2005 Hyundai XG350 is happy to oblige. It provides owners with a classy interior, a long list of standard features, and an affordable price. The XG350 is powered by a 3.5-liter V6 engine mated to a five-speed automatic transmission, sending 194 horsepower and 216 lb-ft of torque to the front wheels. The fuel mileage reaches 16/24 MPG, which is respectable for a midsize car from this era. Owner Response An original owner of a 2002 XG350 reported reaching 225,000 miles during his 21 years of ownership. The car has been his daily driver. It has had some minor repairs, including the starter motor, shocks, suspension bushings, and wheel bearings. Overall, this shows that the XG350 can be a reliable sedan when cared for properly. Why It's Forgotten The XG is an early-generation attempt at a Hyundai luxury car. Luxury cars from mainstream brands have never quite caught on very well. Add to that its bland styling and lack of distinctive character, and it’s easy to see why the XG350 never captured much attention and is largely forgotten today. 2004 Acura TL Reliability Rating: 4.3/5.0 Acura The Acura TL was completely redesigned for the 2004 model year, increasing its luxury position with a nicer interior, powerful V6, and a pleasant ride. The V6 engine could be had with a slick-shifting six-speed manual transmission, which was a feather in its cap. It came standard with a 3.2-liter V6 attached to a five-speed automatic transmission that sends 270 horsepower and 238 lb-ft of torque to the front wheels. Owner Response According to the Acurazine.com forum, some owners have reached 300,000 miles or more in their TL models from the 2000s. Using the original engine and transmission, one owner drove down the street to see the odometer cross that mark and is looking forward to another 100,000 miles or more of driving. Why It's Forgotten Despite being a sporty, reliable luxury sedan with an optional six-speed manual, the 2004–2008 TL has faded from memory. Its conservative styling, dated tech, and the rise of Acura’s SUVs and newer sedans left it overshadowed, making it one of those quietly excellent cars that enthusiasts remember, but the rest of the world mostly doesn’t. 2006 Ford Five Hundred Reliability Rating: 4.4/5.0 Ford If you want a spacious and practical sedan, the 2006 Ford Five Hundred is a good choice. It was a great choice for families on a budget and brought all-weather capability to the sedan market. The large rear seat and trunk, coupled with the balanced ride and handling, made this big car a good choice, especially when equipped with AWD. Owner Response Many owner reviews on Cars.com report them being impressed by the comfortable drive and smooth feeling of the Ford Five Hundred. Some owners have had a few minor issues along the way, with items that need to be replaced, such as the alternator and A/C compressor, but even those owners still drive the car every day. Why It's Forgotten The Five Hundred model name never caught on, and the car eventually became part of the Taurus redesign. It could have been troublesome for Ford to have two full-size sedans competing for consumer attention. 2004 Pontiac Grand Prix Reliability Rating: 4.5/5.0 PontiacThe 2004 Pontiac Grand Prix sounds like a sports car, and with its strong supercharged V6 engine, it certainly could be. This Pontiac sedan provides drivers with nimble handling, attractive styling, sporty gauges, and plenty of room. The supercharged GT2 model has a 3.8-liter V6 engine that produces 260 horsepower and 280 lb-ft of torque (in the GT2 trims), which is sent to the front wheels through a four-speed automatic transmission. Owner Response Reviews of the 2004 Grand Prix seem mixed. One owner on Cars.com reports buying a used car with 55,000 miles on it and reaching 346,000 miles with no major mechanical issues at all. Another owner says the car is poorly designed with large blind spots and issues with the radio display and the gas filler pipe. Why It's Forgotten It’s easy to forget the Grand Prix ever existed unless you see one on the road. The brand was discontinued in 2009, leaving a hole in the automotive world. Its bland styling, front-wheel-drive layout, and the decline of Pontiac’s brand image all contributed to the Grand Prix fading from memory, despite its capable supercharged V6. 2004 Mitsubishi Galant Reliability Rating: 4.5/5.0 The 2004 Mitsubishi Galant provides an excellent balance between ride quality and handling. This car has simple engine choices and conservative engineering, which leads to its longevity on the road. For those wanting more power, the GTS trim came with a 3.8L V6 producing 230 horsepower, giving the Galant a noticeable boost in performance over the base four-cylinder models. The Galant is stylish and comfortable with a roomy rear seat and impressive build quality. Owner Response Owners are fawning over the Galant, calling for the brand to make a new model. One owner on Cars.com reports the only issue is with the O2 sensor, while another boasts more than 282,000 miles using the original engine and transmission, which is pretty good for a car that depends on a small four-cylinder engine. Why It's Forgotten Mitsubishi has pulled back much of its lineup over the years and operates only in a small segment of the SUV market today. The Galant might not be completely forgotten, but it’s not the first car to come to mind during many conversations. 2004 Mercury Sable Reliability Rating: 4.6/5.0 Wikimedia Commons/MercurySable99The Mercury Sable offered a lot for the money, providing above-average levels of safety and cabin space, making it a trusted family vehicle during the 2000s. This car was offered as either a sedan or wagon, making it easy to have a Sable that fits your needs. A 3.0-liter V6 engine attached to a four-speed automatic transmission was the only setup offered. This powertrain sends 155 horsepower and 185 lb-ft of torque to the front wheels. Owner Response Many owners admire the advanced electronics offered for the time and the smooth, comfortable drive offered by the Mercury Sable. One owner stated on CarGurus that they have a Sable with more than 212,000 miles on the odometer that has only required minor/quick fixes periodically, such as the water pump, starter, plugs, and wires, but no other concerns. Why It's Forgotten Like Pontiac, the Mercury brand was the victim of the Great Recession of the late 2000s. Ford deleted the brand, which means many models faded from memory and that includes the affordable and reliable Sable. 2002 Oldsmobile Intrigue Reliability Rating: 4.8/5.0 OldsmobileStyle doesn’t have to be too expensive, as the 2002 Oldsmobile Intrigue proves. This car has clean lines inside and out with impressive styling for a non-luxury vehicle. A sophisticated 3.5-liter V6 engine provides plenty of power and advanced safety features, such as LATCH child-seat anchors becoming part of the equipment offered for this sedan. Owner Response The Oldsmobile brand found favor with older generations, which also means some of these cars weren’t driven much. Despite not finding any high-mileage examples, many owner reviews record owners buying low-mileage versions of this car many years after it was new, and the car is still running well. Why It's Forgotten The Oldsmobile brand was one of the first GM brands to be retired in the 2000s. GM had too many copies of the same vehicles offered with different badging, and at least one had to go, and that was Oldsmobile. 2001 Buick LeSabre Reliability Rating: 4.8/5.0 Buick The 2001 Buick LeSabre is pretty close to a modern land yacht, providing ample room for six passengers, a huge trunk, and a strong V6 engine to get things going. This car was the best-selling full-size American car for eight years straight, making it a trusted machine. The 2001 model even had standard OnStar in-vehicle safety services and an increased oil change interval to 10,000 miles, making it a smart choice for many drivers. Owner Response Many owners show admiration for the 3800 V6 engine in the 2001 LeSabre, with at least one user reporting to the Quora forum that they have driven the car over 300,000 miles. He has replaced the transmission twice during that time, but the engine continues to perform beautifully. Why Is It Forgotten? The Buick LeSabre earned a reputation as an “old-person” car, and that carried the Buick brand down for a few years. This has led to the LeSabre becoming a forgotten model. 2004 Volvo S80 Reliability Rating: 4.8/5.0 Bring A TrailerWhile calling this car forgotten may be an overstatement, you don't really see them on the roads that often, and it's definitely not for their lack of reliability. After all, when you want a car that’s loaded with impressive safety features, the brand to turn to is Volvo. The S80 is an innovative car for its time, with modern safety items and plenty of pep in its step, especially in the T6 trim. The S80 is a good family vehicle with a spacious backseat and comfortable ride, thanks to the Four-C adjustable suspension that smooths things out nicely. Owner Response Owners on sites such as Cars.com and Carsurvey.org rave about the reliability of this sedan, including other model years. One owner calls it "One of the most reliable European Cars in the market." It simply works, always, which makes it a trustworthy vehicle that can handle long daily drives. Another one wrote: "This car is incredible from front to back. Comfortable and reliable plus somewhat sophisticated." Why It's Forgotten The Volvo image transitioned from sedans to crossover SUVs during the past several years. The loss of showroom locations and customer familiarity has put the S80 in the forgotten category. 2003 Infiniti I35 Reliability Rating: 5.0/5.0 InfinitiThe 2003 Infiniti I35 receives a perfect reliability score from Cars.com. It has an excellent V6 engine, provides drivers with a pleasant highway ride, and features a spacious cabin that’s great for a family. The I35 isn’t as luxurious as some peers, but it’s well-equipped and powerful, which makes it a good choice among luxury sedans. Owner Response A Reddit user reports driving the I35 for more than 130,000 miles without any issues, while another user on Maxima Forums has driven their car for more than 277,000 miles. These are just a couple of the examples provided showing the reliability and longevity of this impressive Infiniti sedan. Why It's Forgotten The Infiniti I35 was essentially a rebadged Nissan Maxima, which meant a higher price for the same powertrain and equipment. Many buyers preferred the Maxima, which caused the deletion of the I35.Sources: Cars.com, Edmunds, Carsurvey.