When Mazda introduced the CX-90 Turbo S as the flagship of its new large-platform vehicles, automotive enthusiasts and industry observers anticipated a three-row SUV that would deliver the brand’s trademark driving pleasure in a family-friendly package. With a 3.3-liter turbocharged inline-six engine producing 340 horsepower, a sophisticated eight-speed automatic transmission, and Mazda’s new Kinematic Posture Control system, the hardware suggested a vehicle that could balance utility with genuine driver engagement. However, after subjecting the CX-90 Turbo S to a rigorous 40,000-mile long-term test, the reality proved more complicated than the specifications sheet promised.
The Promising Foundation of Mazda’s New Flagship SUV
Mazda positioned the CX-90 as more than just another three-row SUV when it debuted. The company explicitly stated its ambition to create vehicles that deliver “human-centric” experiences, with driving dynamics taking center stage even in family-oriented models. The CX-90 Turbo S represented the pinnacle of this philosophy, equipped with the most powerful version of Mazda’s new inline-six engine and a host of chassis technologies designed to provide exceptional handling for a vehicle of its size.
The technical specifications read like an enthusiast’s wish list for a family hauler. The 3.3-liter turbocharged inline-six engine features a mild-hybrid system with a 48-volt electrical architecture, providing both immediate torque response and improved fuel efficiency. The eight-speed automatic transmission was specifically developed for this new powertrain family, with Mazda engineers emphasizing its smoothness and responsiveness. Perhaps most intriguing was the inclusion of Kinematic Posture Control, a system that applies subtle brake pressure to the inside rear wheel during cornering to reduce body roll and improve stability.
Initial Impressions Versus Long-Term Reality
During the first several thousand miles of testing, the CX-90 Turbo S demonstrated many of its promised qualities. The inline-six engine delivered strong acceleration, particularly in the mid-range where most daily driving occurs. The cabin offered premium materials and thoughtful design touches that elevated it above mainstream competitors. The steering provided decent feedback for an electric power-assisted system, and the overall ride quality struck a reasonable balance between comfort and control.
However, as the mileage accumulated beyond the 10,000-mile mark, several shortcomings began to emerge more clearly. The transmission, while generally smooth in normal driving, exhibited hesitation during more aggressive acceleration or when quick downshifts were required. This became particularly noticeable during highway merging or passing maneuvers, where the powertrain’s response didn’t match the urgency suggested by the engine’s specifications.
The Disconnect Between Hardware and Execution
The most significant disappointment centered on how the various sophisticated systems failed to create a cohesive driving experience. While individual components showed promise, their integration left something to be desired. The Kinematic Posture Control system, despite its innovative approach to reducing body roll, couldn’t overcome the fundamental physics of a vehicle weighing over 5,000 pounds. During spirited driving on winding roads, the CX-90 still exhibited more body motion than expected, undermining driver confidence.
The brake system presented another area where performance didn’t match expectations. While adequate for normal driving, the brakes showed noticeable fade during repeated hard stops from highway speeds. This characteristic became more pronounced as the vehicle accumulated mileage, suggesting either inadequate cooling or components not fully matched to the vehicle’s substantial weight and performance potential.
Practical Considerations in Daily Family Use
Beyond pure driving dynamics, the long-term test revealed several practical considerations that affected the overall ownership experience. The third-row seating, while usable for adults on shorter trips, offered limited legroom compared to some competitors. More significantly, accessing the third row proved challenging due to the second-row seats’ limited range of motion when tilted forward. This became a frequent inconvenience for families regularly transporting more than five passengers.
Cargo space also presented limitations relative to some three-row SUV competitors. With all seats in use, luggage capacity fell short of what many families might require for extended trips. The sloping roofline, while contributing to the vehicle’s attractive styling, compromised utility in the rear cargo area, making it difficult to load taller items.
Fuel Economy and Running Costs
Over 40,000 miles of mixed driving conditions, the CX-90 Turbo S returned an average of 21 miles per gallon. While not unreasonable for a vehicle of its size and power, this figure fell short of both EPA estimates and the performance of some competitors employing hybrid or diesel powertrains. The premium fuel requirement added to operating costs, particularly during periods of elevated fuel prices.
Maintenance costs remained reasonable throughout the test period, with no major mechanical issues reported. However, tire wear proved more rapid than expected, with the original set requiring replacement at approximately 32,000 miles. This accelerated wear likely resulted from the vehicle’s weight combined with the all-season tires’ compromise between performance and longevity.
Comparison Against Three-Row SUV Competitors
When evaluated against its competitive set, the CX-90 Turbo S occupied an unusual position in the market. Its premium aspirations and driving-focused marketing placed it in competition with vehicles like the Genesis GV80, Audi Q7, and BMW X5, yet its practical limitations in third-row space and cargo capacity made it less compelling for families needing maximum utility.
Driving dynamics, while superior to mainstream three-row SUVs like the Honda Pilot or Toyota Highlander, didn’t reach the levels achieved by European competitors with similar performance claims. The steering precision, body control, and overall chassis tuning of vehicles like the BMW X5 or Porsche Cayenne remained noticeably superior, particularly when pushed beyond normal driving conditions.
The Technology and Interface Experience
Mazda’s infotainment system, while avoiding the complexity of some competitors’ interfaces, presented its own challenges during extended use. The reliance on a rotary controller rather than touchscreen interaction divided test drivers, with some appreciating the reduced distraction and others finding it less intuitive for certain functions. The digital instrument cluster offered clear information presentation but lacked the customization options available in competing vehicles.
Advanced driver assistance systems performed competently but not exceptionally. The adaptive cruise control maintained consistent following distances but reacted somewhat abruptly to traffic slowing ahead. Lane-keeping assistance provided gentle steering inputs but required frequent driver intervention on roads with faded markings or complex intersections.
Reliability and Build Quality Observations
Throughout the 40,000-mile test, the CX-90 Turbo S demonstrated generally good build quality with few significant reliability concerns. Interior materials held up well to daily family use, showing minimal wear on frequently contacted surfaces. The exterior paint and trim maintained their appearance despite exposure to various weather conditions and road environments.
Several minor issues did emerge, including occasional rattles from the panoramic sunroof area and inconsistent operation of the power liftgate. These were addressed under warranty without significant inconvenience, but their presence in a vehicle positioned as Mazda’s new flagship raised questions about attention to detail in certain areas.
The Evolving Perception Over Extended Ownership
Perhaps the most telling aspect of the long-term test was how perceptions of the CX-90 Turbo S evolved over time. Initial enthusiasm for its premium aspirations and sophisticated hardware gradually gave way to recognition of its compromises. What initially seemed like minor quirks in driving dynamics became more noticeable flaws with increased familiarity.
The vehicle’s character never fully coalesced into a coherent identity. It wasn’t engaging enough to satisfy driving enthusiasts seeking a three-row SUV, yet its practical limitations made it less ideal for families prioritizing space and convenience above all else. This identity crisis became increasingly apparent as the test progressed beyond the novelty period into genuine long-term ownership.
Market Positioning and Value Proposition
With a starting price approaching $60,000 for the Turbo S trim, the CX-90 positioned itself at the upper end of the mainstream three-row SUV market while undercutting most luxury competitors. This pricing strategy created expectations that the vehicle would deliver a premium experience without the luxury brand premium. In practice, the CX-90 Turbo S delivered on some aspects of this promise while falling short on others.
The interior materials and design genuinely elevated the experience above mainstream competitors, while the powertrain offered strong performance on paper. However, the driving dynamics didn’t deliver the engaging experience suggested by Mazda’s marketing or the vehicle’s technical specifications. This disconnect between promise and delivery became the defining characteristic of the long-term ownership experience.
The automotive landscape continues to evolve rapidly, with manufacturers pursuing different strategies for balancing performance, utility, and efficiency in three-row vehicles. Mazda’s ambitious attempt to inject genuine driving pleasure into this practical segment deserves recognition for its intent, even if the execution in the CX-90 Turbo S reveals the significant challenges of this undertaking. For prospective buyers, the long-term test underscores the importance of looking beyond specifications and marketing claims to evaluate how a vehicle performs in the context of real-world ownership, where compromises become apparent and initial enthusiasm must give way to daily practicality.
