Mechanic checking a car engine in a garageIt's no secret that Lexus regularly ranks as one of the most reliable car brands on the market, if not the most reliable. The brand's vehicles are constantly praised for their build quality and longevity. Despite this reputation, a J.D. Power survey has found that the Toyota subsidiary's service centers aren't the most satisfying out there. While Lexus ranks highly among premium SUV brands, it didn't take top spot in J.D. Power's 2026 U.S. Customer Service Index Study. Instead, that honor went to a different Japanese automaker, Infiniti.Nissan's luxury arm earned 911 out of a maximum of 1,000 points, beating out the other 13 premium brands in the study. To put that number in perspective, the average satisfaction rating for premium SUV dealership service was 884. This is quite the improvement for Infiniti, as it only finished fifth in J.D. Power's 2025 survey with a score of 882.For those perhaps concerned about Lexus dealership service satisfaction, there's nothing to worry about. The brand still earned an impressive score of 897 for SUV service, putting it in third place. This was a slight drop from 2025, when it placed second with 902 points. Thus, owners are consistently happy with Lexus's dealership service for SUVs. Even with these scores, though, neither Infiniti nor Lexus claimed top spot as a whole. Porsche narrowly edges out Infiniti overallRed Infiniti QX65 parked in front of a building.Infiniti may have earned the top spot from J.D. Power for dealership satisfaction, but this was not a runaway victory. It took first place by the narrowest of margins, its 911 points just one ahead of Porsche in second place. Conversely, Porsche finished just ahead of Infiniti overall, regardless of vehicle type, with a satisfaction score of 915. The two brands were tied in the premium car segment, however, with 921 points each — 11 points above Lexus.Like Lexus, Porsche is another brand with impressively consistent dealership service. Porsche placed first in J.D. Power's 2025 study, too, with a score of 912. It also took the top spot for premium car and SUV service satisfaction in 2025, with 906 and 917 points, respectively. In 2024, it was second overall, with a first-place finish for premium cars.Although Porsche is more renowned for its performance and style, it does produce surprisingly reliable vehicles, and it's arguably the most reliable German automobile brand on the market. Considering the average cost of its offerings, one would hope that the brand would also offer a great service experience if things ever go wrong. Based on J.D. Power's surveys, Porsche delivers on that. Want the latest in tech and auto trends? Subscribe to our free newsletter for the latest headlines, expert guides, and how-to tips, one email at a time. You can also add us as a preferred search source on Google.