This Flat-Six SUV Is A Unique Bargain In 2025

Most Subarus in modern memory run some configuration of the flat-four engine. Still, long before turbochargers signaled the end of so many affordable six-cylinder powerplants, Subaru offered a flat-six in selected models to those after a little more power and exclusivity, and with a taste for something unique and unconventional under the hood. Eventually, the Legacy and Outback siblings carried the 3.6-liter flat-six BOXER engine to its final resting place, though the flat-six also had a long career under the hood of the Subaru Tribeca as well. This SUV has the distinction of being the only SUV ever powered by a flat-six engine, and comes from one of just two automakers who still build flat-configuration engines to this day.

Below, we’ll look back at the life and times of the Subaru Tribeca and its flat-six engine, check out its original asking prices, and see what you’ll pay for a second-hand unit today. Of course, we’ll also dig into a few reasons you should consider a used Subaru Tribeca, and a few reasons to skip it.

The Life and Times of The Subaru Tribeca

In the early to mid-2000s, the SUV was becoming pretty trendy, and competition was growing intensely among family-oriented machines with all-wheel drive and three seating rows. Subaru had the AWD part of the equation covered well, but no three-row product on offer. Shoppers after an AWD-equipped SUV bigger than a Forester or Outback had to leave Subaru Showrooms and check out a GMC Acadia or Toyota Highlander, and that just wouldn’t do.

The Tribeca, complete with seven seats and its controversial initial release face, hit the road for 2005. The idea was to enter the scene with a unique and upscale offering that would leverage Subaru’s existing reputation for capability and safety to attract new customers to the brand, while bringing existing Subaru drivers upmarket into a larger machine.

The styling was too polarizing. By 2008, the Tribeca had been re-skinned and updated, though the platform beneath remained largely unchanged. A larger flat-six engine was installed, and the styling was ‘normalized’, giving the Tribeca a far more generic look that wasn’t particularly successful either.

The Tribeca was discontinued after 2014, taking the market’s only three-row SUV with flat-six power along with it. The flat-six engine lived on a few more years until an update to the Legacy and Outback saw the final Subaru flat-six engines go to car engine heaven somewhere in late 2019. If you don’t need three seating rows, or you’re not set on a particular body style, then be sure to consider either of those models as alternatives to the Tribeca.

Add in the flat-six engine’s reputation for being neither particularly powerful nor fuel-efficient, a platform that was growing dated against competitors, and an economic recession, and the Tribeca ultimately didn’t have what it took to stick around for a second generation. For 2019, the Subaru Ascent arrived to retake the top position in the SUV lineup, filling the gap left by the Tribeca’s departure a few years before. The Ascent came with a flat-four turbo engine, meaning that when the Tribeca was discontinued, the market’s only flat-six-powered 3-row SUV disappeared forever.

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Subaru Tribeca Pricing: Then vs Now

For most of its life, the Tribeca’s starting MSRP was between $30,000 and $34,000. For the 2012 model year, standard equipment included 18-inch rims, a CD player with MP3 capability, steering-wheel controls, engine immobilizer, rollover detection, side airbags, and heated front seats. Look for a windshield wiper de-icer and tire pressure monitoring as well. Higher-end units like the Tribeca Limited get 2-position memory seating, upgraded Harman Kardon audio with 10 speakers, an in-dash CD changer, Bluetooth and satellite radio. The Touring model adds a power moonroof, backup camera, HID headlamps and body-colored roof-rails.

Today in 2025, data from Autotempest shows that the lowest-mileage Tribeca units you’re likely to come across are likely tickling the 100,000 mark on their odometers, with asking prices for the lowest-mileage machines coming in between $7,000 and $12,000, depending on the model year and equipment level. There were almost no pre-facelift models on the second-hand market as of this writing.

If you’re not afraid of some DIY repairs or maintenance, or a heavy odometer reading, you can pick up a used Tribeca approaching 200,000 miles for as little as $4,000. Data from Repairpal says that 2014 Tribeca owners are spending about $548 annually on maintenance and repairs, with most common repairs listed at under $200 for things like AC system leaks, brake system diagnosis and servicing, and Check Engine Light (CEL) diagnosis.

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What To Know Before You Buy

If you’re set on buying a used Subaru Tribeca, there are a few pointers and considerations to bear in mind, many of which have to do with the model’s age. The newest second-hand Tribeca you’ll find on the used market today is 11 years old, running safety equipment, connectivity tech, and a lighting system that are all several generations old. In its day, the Tribeca was highly recognized for safety, though things have advanced considerably since then. If your budget is flexible, a newer 3-row SUV on a more modern platform from even a few years later can represent a good opportunity to upgrade into something safer.

The flat-six engine is a bit special, which is exactly why some shoppers are keen to own one. If you’re not so concerned about the type of engine under the hood of your SUV, other alternatives in this price range are easier on fuel and more powerful, making better use of your fuel dollars. Though the Tribeca’s driveline is known to be solid and its AWD system knows what it’s doing, the flat-six engine’s performance wasn’t particularly thrilling, and it was a little on the thirsty side. Thankfully, it ran on regular-grade gas.

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On the maintenance side, the Tribeca’s warranty and service guide specifies various inspections and maintenance routines that may be applicable as the unit you’re considering approaches the 100,000-mile mark, including an inspection of the brakes, all fluid levels, axle boots, and the performance of the engine coolant. If in doubt, check with your owner’s manual and confirm against all available maintenance records to ensure the Tribeca you’re considering isn’t overdue for any important work. Staying on top of regular maintenance, whether in a dealer or private setting, will help your used Tribeca keep ticking reliably for the long haul.

If you’ll use your Tribeca regularly in winter climates, and especially in areas that use road salt, having the unit you’re considering oil-sprayed or corrision-treated is a great way to help preserve the Tribeca’s underside by protecting it from rust. It’ll likely improve down-the-line resale value, too. On the same token, be sure to budget in a set of quality winter tires if you’ll be out and about in frigid weather. The Tribeca’s AWD system is highly effective, but works much better on snow and ice with proper tires installed.

With a 3,500-pound towing capacity, your used Tribeca is up for plenty of towing-related tasks. If you’ll frequently tow with yours, be sure to overchange fluids and filters to help extend the life of your machine. Especially if you’ll be towing regularly, a full on-the-hoist health check of the model you’re considering, as well as a full fluid change and tune-up, can go a long way towards reliable ownership.

Sources: Subaru, AutoTempest