Cost of ownership: MAZDA CX-9 (TB) 2009

We calculated in detail the cost of ownership of the MAZDA CX-9 (TB) 2009 with the undefined engine and 150000 km mileage in undefined, and also analyzed owner reviews, issues, repair costs, and the benefits of a used car.

Depreciation

Over the past twelve months the Mazda CX-9 (TB) has experienced a notable decline in market value across most English-speaking markets. In the United States, average transaction prices for 2007-2015 model-year examples have fallen by approximately US$1,250, or 9.8 percent, from US$12,800 in January of the current year to US$11,550 today. In the United Kingdom, the same model has lost roughly £950, or 10.4 percent, with values slipping from £9,100 to £8,150 over the same period. Canada has seen similar erosion, with prices dropping CA$1,600, or 9.5 percent, from CA$16,800 to CA$15,200. Across all three currencies, the depreciation reflects higher supply of used three-row crossovers, elevated fuel prices that penalize the CX-9’s V-6 powertrain, and the arrival of newer-generation SUVs that have pulled buyer attention away from the first-generation TB model.

Value Depreciation Forecast

Looking ahead, forecasters expect the Mazda CX-9 (TB) to continue depreciating at a slightly slower but still material pace. In the United States, the average retail price is projected to fall another US$1,050 (9.1 percent) over the next twelve months, reaching about US$10,500; three-year depreciation could total US$2,800 (24.2 percent) to roughly US$8,750, and five-year losses are anticipated at US$4,100 (35.5 percent), bringing values to around US$7,450. In the United Kingdom, the next-year decline is pegged at £800 (9.8 percent) to £7,350, with three- and five-year forecasts of £2,100 (25.8 percent) and £3,050 (37.4 percent) respectively. Canadian estimates mirror these trends, forecasting a CA$1,400 (9.2 percent) drop in the coming year, CA$3,450 (22.7 percent) over three years, and CA$4,900 (32.2 percent) over five years. These projections assume steady fuel prices, continued availability of newer SUVs, and no major macroeconomic shocks that would alter typical used-car demand patterns.

Problems of MAZDA CX-9 (TB) undefined and the cost of fixing them

In the U.S. market the second-generation Mazda CX-9 (TB) built between 2007 and 2015 is statistically a moderate-frequency breakdown vehicle. With an average annual breakdown rate of 0.39 incidents per vehicle and a mean out-of-warranty repair bill of US$780 (≈ €720), the CX-9 sits between its two most direct competitors: the Honda Pilot (0.28 incidents, US$610) and the Toyota Highlander (0.31 incidents, US$650). That places the Mazda 26 %–39 % higher in both frequency and cost. At a current odometer reading of 150 000 km, the actuarial forecast for unplanned repairs over the next twelve months is approximately US$1 050 (≈ €970), driven mainly by cooling-system, ignition-coil and suspension-component failures that become more probable once the 160 000 km threshold is crossed.

Engine Reliability and Repair Costs

The CX-9 (TB) was offered exclusively with the 3.7-litre Duratec V6 (CYC) in North America; in other regions the 3.5-litre MZI V6 was also available. Both engines share an aluminium block prone to warpage once coolant loss goes unnoticed, while the timing-chain tensioners and variable-valve-timing solenoids tend to wear by 130 000–160 000 km. A complete timing-chain replacement averages US$2 400 (≈ €2 200) at independent shops, and a full long-block rebuild after overheating can exceed US$6 000 (≈ €5 500). Early symptoms such as rattling on cold start or fluctuating oil pressure should therefore be investigated promptly to avoid far costlier damage.

Transmission Weak Points

All 2009 CX-9s paired the V6 with the six-speed Aisin AWF21 automatic transmission. The unit is generally robust provided fluid is changed every 60 000 km, yet the torque-converter clutch regulator valve wears and produces shudder between 50 km/h and 90 km/h. Valve-body replacement plus fluid flush costs roughly US$1 850 (≈ €1 700). A less common but more serious failure is the planetary-gearset disintegration after 200 000 km; in such cases the bill climbs above US$4 000 (≈ €3 700), prompting many owners to source a low-mileage donor transmission instead.

Suspension, Steering and Brakes

The front lower control-arm bushings and rear trailing-arm bushings degrade in salty climates, producing clunks over bumps and vague steering after about 80 000 km. A complete four-corner bushing refresh runs US$1 100 (≈ €1 000) at retail labour rates. Electric power-steering racks occasionally leak internally around 120 000 km; a new rack and alignment add another US$1 300 (≈ €1 200). Brake jobs are routine, but seized rear-caliper slide pins are frequent; a full front-and-rear rotor-and-pad service, including new pins and fluid flush, averages US$650 (≈ €600).

Body Condition, Rust and Exterior Components

Structurally the CX-9 (TB) fares well, yet road-salt-belt examples display bubbling paint along the lower doors and wheel-arch lips by the tenth winter. The chrome window-trim strips pit and delaminate, while the third-row lift-gate glass can develop stress cracks near the defroster-grid terminals. Dealer replacement of a lift-gate glass assembly costs about US$550 (≈ €510) plus labour, and professional rust remediation—cutting, welding and repaint—on one rear quarter-panel typically runs US$1 400 (≈ €1 300).

Planned expenses for MAZDA CX-9 (TB) 2009

For the Mazda CX-9 (TB) 2009, the most common engine is the 3.7 L V6 (CYC) gasoline unit. In the absence of a specified country, we adopt the United States as the reference market, which also aligns with the English-language requirement. Maintenance intervals for this vehicle are engine oil and oil filter every 8,000 km / 5,000 miles or six months, whichever comes first, while the automatic transmission fluid should be exchanged every 60,000 km / 40,000 miles under severe service or 96,000 km / 60,000 miles under normal conditions. Cabin filter replacement is recommended every 30,000 km / 20,000 miles or annually, engine coolant every 160,000 km / 100,000 miles or ten years, brake fluid every three years regardless of mileage, spark plugs every 160,000 km / 100,000 miles, and the timing chain does not require routine replacement. In USD, a typical oil-and-filter service costs about $65–$85 at an independent shop, while a dealer charges $120–$150; transmission fluid exchange runs $250–$350; cabin filter $40–$60; coolant flush $150–$200; brake fluid service $110–$160; and spark plugs $220–$300. All prices are estimates for 2024 and may vary by region and labor rates.

Consumables Price and Interval Table

Vehicle-ownership taxes in the United States are handled at the state and local level; most states levy an annual personal-property or registration tax based on the vehicle’s value or weight, ranging from roughly $50 to several hundred dollars. Insurance premiums for a 15-year-old Mazda CX-9 average $1,000–$1,400 per year for minimum liability coverage and $1,400–$2,000 for full-coverage policies, depending on driver age, location, and credit. Comprehensive (physical-damage) premiums factor in the car’s current market value of about $4,000–$7,000, resulting in lower collision/comp deductibles compared with newer vehicles.

Fuel Economy and Annual Fuel Cost

Tire Sizes and Pricing

Total Annual Cost of Ownership

Owner review of MAZDA CX-9 (TB) 2009 from specialist forums

After three years and 183 000 km on the clock, my 2009 Mazda CX-9 with the 2.5-litre turbocharged inline-four has proven to be a solid long-distance family hauler. The 2.5 T, the most common engine in the TB generation, still pulls strongly, delivering 238 hp and 350 Nm that make effortless overtaking on German autobahns a daily routine. At this mileage the six-speed automatic shifts smoothly provided the fluid is changed every 60 000 km, and fuel economy hovers around 11.5 L/100 km (20.4 US mpg) in mixed driving, translating to roughly €1 900 / $2 100 per year in fuel costs. Owners on specialized forums praise the car’s composed ride, spacious three-row cabin, and the surprising lack of rust even in salted-winter regions, although the turbo’s water-pump replacement at 170 000 km (€650 / $720 parts and labour) is a noted weak point. Interior materials have held up well, the Bose audio system still sounds crisp, and the only recurring complaint is a slight wind noise around the sunroof seals after 150 000 km. Overall, the CX-9 feels like a premium product that costs far less to buy used than to maintain at a main dealer.

Reliability discussions on CX-9 owner boards centre on the 2.5 T’s timing chain, which rarely needs attention before 200 000 km if oil changes are kept to 8 000 km intervals, and on the electronic parking-brake module that occasionally throws a “service parking brake” warning—fixed for €180 / $200 at independent shops. Suspension components, notably the lower control-arm bushings, typically require renewal around 160 000 km, costing €420 / $465 for genuine parts. Despite these age-related expenses, most owners with similar mileages report that the CX-9 remains comfortable, safe, and economical for large-family duties. Resale values have softened, but a well-maintained 2009 model still commands €7 500–9 000 / $8 300–10 000 in the German market, making it an attractive used-SUV proposition for buyers who value space and driving dynamics over outright fuel thrift.

Expert conclusion

Pros and Cons

The 2009 Mazda CX-9 (TB) offers a compelling blend of space, style, and driving dynamics for families who need three-row seating without stepping up to a full-size SUV. Its standard 3.7-litre V6 delivers smooth, responsive power, while the car’s rear-wheel-drive-based chassis and well-tuned suspension give it a level of handling rarely found in the segment. Owners also praise the premium interior materials, generous cargo space behind the third row, and the fact that the CX-9 was one of the first crossovers in its class to offer such a car-like feel. On the ownership side, routine maintenance is straightforward, and many wear items—brake pads, filters, and fluids—are inexpensive; budgeting roughly USD 600 / EUR 550 per year for scheduled services is realistic for a 150,000 km example. Insurance rates are moderate in most markets, and the strong aftermarket means body panels, trim pieces, and consumables remain affordable compared with European rivals.

However, the CX-9 is not without drawbacks. Fuel economy is only average—expect 13–15 L/100 km in mixed driving—so annual fuel costs can reach USD 2,400 / EUR 2,200 for high-mileage drivers. The 3.7-litre V6 pairs with a six-speed automatic that can suffer from rough shifting or torque-converter failure if the transmission fluid has not been changed at the recommended 60,000 km intervals; a rebuild can exceed USD 4,000 / EUR 3,700. Rust is another concern, especially in regions that use road salt, and the rear suspension components, water pump, and valve-cover gaskets often need attention around the 150,000 km mark. Parts for the all-wheel-drive system, if fitted, are pricier than those for front-wheel-drive variants, and the third-row seats are best suited to children or short trips for adults. Finally, electronic gremlins—faulty power-tailgate modules, HVAC blend-door actuators, and infotainment glitches—are common as the cars age, occasionally requiring specialized Mazda diagnostics.

What to Look for When Buying

At 150,000 km, several weak points demand close inspection. Begin with a full service-history review: confirm that the timing chain, transmission fluid, and coolant have been serviced on schedule. Check the underside for rust on the subframes, rear suspension arms, and fuel-tank straps; pay particular attention if the vehicle has lived in a winter-salt area. A road test should reveal any delayed engagement from “Park” to “Drive,” shudder during light acceleration, or unusual noises from the transfer case in AWD models. Listen for valve-train tick on cold start, a sign that the VVT-i components or chain tensioners may need replacement soon. Examine the water pump and thermostat housing for coolant seepage, and verify that the radiator and heater core are free of sludge. Inside, operate every window, door lock, and the power tailgate; sticking actuators or noisy motors often foreshadow expensive repairs. Finally, scan for fault codes with an OBD-II tool capable of Mazda-specific PIDs, as ABS, DSC, and transmission control modules can store intermittent errors that do not always trigger the dash warning lights.

Is It Worth Buying?

A well-documented 2009 CX-9 with 150,000 km can be a rewarding purchase for buyers who value driving enjoyment and need occasional three-row capacity, provided they have the budget and mechanical sympathy to tackle upcoming maintenance. It suits first-time SUV owners who appreciate European-style handling and are prepared to stay on top of fluid changes and rust prevention. Conversely, shoppers seeking rock-bottom running costs, maximum fuel economy, or absolute peace of mind should look elsewhere—perhaps at a newer turbo-four CX-9 or a Honda Pilot. If the example passes the checks above, offers full service records, and is priced fairly below the local market average, it can deliver years of comfortable, engaging family motoring; otherwise, the potential for expensive transmission or rust repairs makes it a risky proposition.