2014 Nissan Altima 2.5 S on 2040-cars

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Watch Nissan's autonomous Leaf in action

Getting its semi-autonomous Leaf legalized in Japan was just the first step. Now, Nissan is giving demonstrations of what its fully autonomous car is capable of at this year's Combined Exhibition of Advanced Technologies (CEATEC) show - Japan's equivalent to America's Consumer Electronics Show. To show off the possibilities of its technologies, Nissan had an oval track set up at the show giving rides in an autonomous Leaf to the media. Even Nissan CEO Carlos Ghosn and Toyota CEO Akio Toyodo caught a ride.
Nissan has since released a couple videos of its CEATEC demos, with one designed to look like a news report. In this video, you can watch the car go around the track and navigate intersections and road hazards. The second video shows Ghosn riding in the car, and he hints that Nissan's goal of having an autonomous vehicle in production by 2020 might be more of a worst-case scenario. Watch both videos and read through Nissan's official press release below.

Common Nissan Maxima vs. Subaru Legacy breakdowns

The Nissan Maxima and Subaru Legacy are both popular sedans. Similarities can be seen in price, styling, and performance. What are some common repair problems seen in each model? When do they occur and how much do they cost to fix? What about how to pay for car repairs? Let's find out. Check Engine Light Both Maxima and Legacy owners dread the appearance of this little light. In the Nissan, it's most likely a failed ignition coil. This part transforms the car battery voltage into a higher voltage required for starting. This problem appears more often in Maximas with over 140,000 miles. The cost to replace the ignition coil runs around $400, parts and labor. The check engine light on the Subaru Legacy is more often due to a failed oxygen sensor. The O2 sensor measures the oxygen level in the exhaust and can affect fuel consumption. This part fails more frequently in models with over 110,000 miles. The repair costs around $200. Legacy Sound System Problems It's not uncommon for the Legacy to have sound system failures at 140,000 miles or more. The speakers might not work or only function intermittently. Hitting a bump might also cause the radio to shut off. Repair costs here can vary, but the typical charge is around $600. Nissan Check Engine Light Part 2 The Nissan check engine light also may appear due to oil leaking from the camshaft position sensor. Difficulty with stalling and acceleration might occur as well. The repair costs around $250 and is more frequent in models with over 104,000 miles. Big-Ticket Items Some repairs are especially costly. In Maximas with over 120,000 miles, the power steering pump may begin to malfunction. This produces a clunking or knocking sound when driving over uneven terrain. Steering might be affected with abnormal noises heard when turning the steering wheel. A Nissan Maxima power steering pump replacement costs around $1,250, parts and labor. Now, if you begin to feel your Legacy vibrating or shuddering at around 116,000 miles, it may be a transmission problem. It's more noticeable when the car shifts gears. Legacy transmission repair can be expensive, costing up to $2,000 or more. Even more costly is a Subaru Legacy head gasket failure, seen more often at 110,000 miles or more. AC malfunction, fluid leaks, and engine overheating can occur when the head gasket fails. The repair costs are around $3,000.

Meet the Greenest and Meanest vehicles of 2016

If you've been keeping track, you won't be surprised with the number one entry in this year's list of greenest cars from the American Council for an Energy-Efficient Economy (ACEEE). In fact, the top three spots on the 2016 list are all the same as they were in 2015. After that, things get interesting. For one thing, this is the first Greenest list that doesn't have any purely internal combustion engine powertrain on it. Hybrids, yes, but if you want to be one of the top 12 greenest cars this year, you'd better have some sort of electric angle. ACEEE says that the conventional, gas-powered Smart Fortwo and Chevrolet Spark just missed the cut. In a statement, ACEEE lead vehicle analyst Shruti Vaidyanathan said, "The 2016 scores are in, and plug-in electric vehicles are outpacing all other vehicle offerings in terms of environmental friendliness." Like last year, one of the noticeable vehicles missing from the green list is the Tesla Model S. One reason? ACEEE takes curb weight into account (lighter is better), and the Model S is a heavy beast. The ACEEE doesn't just look at the clean side of the ledger. It also puts out a "meanest" list. These are the vehicles that pollute the most, not only from their tailpipes, but also any pollution created during the entire manufacturing process, from mining the raw materials to the energy used to produce the vehicle at the factory. The entire list, from greenest to meanest, is done using a "cradle to grave" analysis. You can see how the ACEEE determines its rankings here, explore the entire greenest cars site here, or click through our galleries to see which vehicles are extra green (above) or extra mean (below) this year. 12: Mercedes-Benz GL550 4MATIC View 12 Photos More Electric Cars than Ever on Greenest Vehicles List Electric Vehicles Nab 9 out of Top 12 Spots in ACEEE's Environmental Vehicle Rankings Washington, DC: Despite a tumultuous year for the automotive industry, manufacturers have continued to offer exciting technology options for a growing vehicle market. Today at greenercars.org, the American Council for an Energy-Efficient Economy (ACEEE) released its 19th annual comprehensive environmental ratings for vehicles. The following vehicles comprise the Greenest List for 2016: Greenest Score 1. Mercedes-Benz Smart ForTwo Electric Drive Convertible / Coupe 63 2. Chevrolet Spark EV 63 3. Fiat 500E 62 4. Toyota Prius Eco 61 5. Volkswagen E-Golf 61 6. Nissan Leaf S / Leaf SV 61 7. Kia Soul Electric 59 8.