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Report ranks vehicles according to check-engine light frequencies and repair costs

CarMD reliability ranking places the 2018 Toyota Tacoma as most reliable and 2018 Hyundai Tucson as most affordable vehicle

Irvine, Calif.— Corporation released its 2020 CarMD Vehicle Health Index Make and Model Reliability Rankings on Wednesday, continuing its decade-long tradition of analyzing and reporting on which model year 1996 to 2020 vehicles require the fewest check engine light repairs and which cost least to fix when they do need repairs.

CarMD finds that Mitsubishi was the brand least likely to need check engine repairs over the past year, edging out Mercedes and Volkswagen, which rank No. 2 and No. 3 respectively. The 2018 Toyota Tacoma ranked as the vehicle least likely to need a check engine light repair; and the 2018, 2017 and 2016 Tacoma swept the category for trucks least likely to need repairs in 2020.

While CarMD does not currently rank the vehicles most likely to have a check engine light problem, Vehicle Health Index calculations show that the 2018 Toyota Tacoma is more than 50 percent less likely to experience a check engine light issue than the worst ranked vehicle, which is a 2009 domestic SUV.

For the second consecutive year, Kia is the brand with the lowest average repair cost ($322), followed closely by Chrysler ($333) and Mazda ($339). The 2018 Hyundai Tucson cost the least on average ($34) to repair. Ford, GMC, Mazda and Volkswagen are the brands to rank in the top 10 on both lists this year, meaning they have both low frequency of check engine light incidents and low average repair costs.

10 Most Brands Least Likely to Have a Check Engine Light Come On

CarMD studied data from more than 19.5 million unique model year 1996 to 2020 vehicles reporting check engine health to identify the brands least likely to need check engine repairs. To rank these brands, CarMD developed an index frequency score formulated by the lowest percentage of repair incidents per percentage of vehicle population.

10 Vehicles Least Likely to Have a Check Engine Light Come On

Any given brand can have a mix of reliable vehicle models along with some that have more frequent issues. And vehicle reliability can vary by model year, particularly when a model change has occurred. For this reason, the CarMD Vehicle Health Index drills down to rank vehicles by year, make and model. The following 10 vehicles had the lowest check engine light-related repair frequency, resulting in fewer trips to the repair shop, parts store or dealership in 2020:

10 Brands with the Lowest Average Repair Costs

When factoring in all of the repairs needed on the various models and model years under each automaker, CarMD found the 10 vehicle brands with the lowest average check engine light-related repair costs in 2020 were:

10 Vehicles with the Lowest Average Repair Costs

When the check engine light comes on, the following are the 10 vehicles that CarMD found to have the lowest average repair cost among the more than 10,145 different model year, make and model vehicles analyzed by CarMD. Many of these repairs come in under the average national hourly labor rate for automotive diagnostics and repair because they require simple fixes that can be done in less than an hour or at home by a skilled enthusiast:

The most common repair on 9 out of 10 of the most affordable vehicles to fix is to inspect or replace a loose, damaged or missing gas cap or fuel cap gasket. An often quick, easy and affordable repair, if ignored fuel cap problems can reduce fuel economy and lead to additional problems down the road.

For instance, the most common repair on the 2018 Hyundai Tucson is to tighten the gas cap, accounting for nearly half of this model year’s recommended repairs, while the national average for gas cap-related repairs is 4.5 percent. On an older 2005 Hyundai Tucson, the most common repairs are oxygen sensor and catalytic converter replacements. As vehicles age, the type of repair changes and the average cost to repair them typically increases.

This Index ranks the 10 brands/makes and 100 vehicles least likely to have a check engine light on; 10 brands/makes and 100 vehicles with the lowest average repair costs; and top three vehicles by category. To compile this index CarMD analyzed data from over 19.5 million model year 1996 to 2020 vehicles reporting check engine health from Oct. 1, 2019 – Sept.  30, 2020. The full detailed report with year-over-year scores is available at here.

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