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Subaru · Full-Size SUV · 2006–2014 Custom Search

Subaru Tribeca B9

Weaknesses, engine ratings and buying advice

5.0 / 5.0 · Based on 1 engine variants · How we rate

The Tribeca is Subaru's foray into the big seven-seat SUV class — and it stayed a genuine niche model. The polarizing cockpit face of the early years, the heavy fuel appetite, and the low production numbers depress values to this day. If you want a rare, characterful flat-six boxer with permanent all-wheel drive and can look past the styling, you get a sturdy, comfortable family car in return.

Under the hood are two naturally-aspirated H6 units: the early EZ30 (3.0 litres, around 245 hp) and, from the 2008/2009 facelift, the EZ36 (3.6 litres, around 260 hp, 335 Nm). Both run silky-smooth, are timed by three chains, and are mated to a 5-speed torque-converter automatic. Clear recommendation: get the EZ36 from 2009 onward if you can — stronger and a touch more durable than the EZ30, even if the typical weaknesses stay similar.

The most important trouble spot is the power-steering belt drive: the serpentine belt wraps far around the idler pulleys, whose bearings seize under the high side-load. If the belt snaps, power steering and cooling fail instantly — on the test drive, listen hard for whining or squealing from the belt area. Add worn timing-chain tensioners (chain rattle), grinding wheel bearings whose drone rises with speed, and the 5-speed automatic's torque-converter shudder around 40 to 90 km/h. That last one is documented in a TSB, never a recall — a converter swap costs moderately and doesn't require a full transmission replacement. On top come rust at door pillars and rockers, a known fire concern at the step lighting, the Takata airbag recall (model years 2009-2013), and the usual weakening A/C.

Repair costs stay affordable thanks to mass-production hardware: belt tensioner and idler pulleys are cheap, wheel bearings sit in the mid-three-figure range. It only gets expensive if you ignore the symptoms.

2026 market price: in Germany the range runs roughly from 1,750 to 7,450 euros with an average around 4,700 euros. Real examples: nearly 300,000 km, first registered 2007 for 5,800 euros; 147,000 km, 2010 for 4,490 euros. The EZ30 lasts around 250,000 to 300,000 km when cared for, the EZ36 about 300,000.

Test-drive red flags: belt whine, chain rattle, droning wheel bearings, and above all the converter shudder — check deliberately at 40 and 80 km/h. The Takata recall, timing-chain tensioner, and a freshly replaced belt drive should be documented. Insider pick: a service-history EZ36 from 2009 onward with the Takata recall done and a fresh belt drive — the most sensible, most durable Tribeca.


Engine Overview

The Subaru Tribeca B9 is available with one engine variant at 258 hp.

3.6L H6 · Petrol· 258 PS
2008 2014

The 3.6-litre flat-six is one of Subaru's most reliable designs and is considered much more durable than the smaller H6 predecessor. Mileages beyond 300,000 km are not rare on cared-for examples. The timing chain is designed for engine life; only the plastic tensioner can develop play at high age. The most common issue is oil leaks: the timing-chain cover is sealed with liquid sealant rather than a gasket, which dries out after many years — a correct reseal is involved and often needs the engine out. The serpentine-belt tensioner also wears over time. Otherwise there are no design weak points. Regular oil changes and checking for damp seals low at the front are important.

  • !! Timing Chain Tensioner Worn from 150,000 km

    Plastic timing chain tensioner wears after 90,000+ miles and can no longer maintain adequate chain tension. Starts with cold-start rattle, can progress to timing chain jump. Expensive repair due to many bolts on the chain cover.

    Symptoms: Rattling on cold start, loud chain noise, misfires at high mileage
    1,500–3,200 $
  • !! Timing-cover oil leak from 160,000 km

    The aluminium timing-chain cover is sealed not with a gasket but with liquid sealant. Over time it dries out and the engine seeps oil at the seams, later dripping. A correct reseal often needs the engine out.

    Symptoms: Oil marks on the ground, an oil smell in the bay, seeping seams low on the timing cover, a slowly dropping oil level.
    1,200–2,500 $
  • ! Oil Leaks at High Mileage from 120,000 km

    Valve cover gaskets and timing chain cover become leaky at higher mileage. Typical for boxer engines with many sealing surfaces. Not a critical weakness, but noticeable cosmetically and by smell.

    Symptoms: Oil spots under engine, oil smell when engine is hot
    800–2,000 $

+ 1 more engine weaknesses + vehicle weaknesses

Vehicle Weaknesses

WeaknessCost
!Power Steering Failure (Belt/Idler Pulley)

Idler pulley or belt tensioner seizes — power steering fails, alternator stops charging. Metallic noise, burning rubber smell. Typically above 60,000 miles.

Symptoms: Heavy steering, battery warning light, burning smell, belt squealing
from 90,000 km
Medium
NHTSA Owner Complaints
Below average
185 complaints · 2006–2014
  1. 01 Airbags
    45 ⚠ 6
  2. 02 Body Structure
    42 ⚠ 2
  3. 03 Electrical
    30 ⚠ 2
  4. 04 Lighting
    20
  5. 05 Brakes
    17 ⚠ 4

Top Reported Issues

Airbags (45 complaints)
Body Structure (42 complaints)
Electrical (30 complaints)
Source: NHTSA (nhtsa.gov) · 2026-03

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Known Problems and Issues +

A total of 11 weaknesses have been documented for the Subaru Tribeca B9 (2006–2014) — 4 engine-related and 7 vehicle-related. Typical issues affect Steering, Suspension, Rust, Electronics. Considered reliable: EZ36 (3.6L H6).

What to watch out for with the Subaru Tribeca? See the detailed listing of all engine and vehicle weaknesses in the sections above.

Frequently Asked Questions

What problems and weaknesses does the Subaru Tribeca B9 have? +
The Subaru Tribeca B9 has 4 known engine weaknesses and 7 vehicle weaknesses.
What should I look for when buying a used Subaru Tribeca B9? +
faq.watch_a_solid
Which engine is recommended? +
Good choice: EZ36 (3.6L H6). The most reliable engine is the EZ36 (3.6L H6) with the lowest risk score. The most fun to drive is the EZ36 (3.6L H6).
Which Subaru Tribeca B9 engine is the most reliable? +
The {code} ({displacement}) is the most reliable engine in the Subaru Tribeca B9. It has the lowest risk score of all available engines and is rated "Good Choice". However, there are 4 known weaknesses to be aware of.
Which Subaru Tribeca B9 engine is the most fun? +
The {code} ({displacement}) offers the most driving fun in the Subaru Tribeca B9 — rated: "Not Really". {description} H6 boxer in SUV form: well-powered but too small for the class and too expensive for what it offered. Discontinued in the US in 2014, never caught on in Europe. Almost forgotten today.
Is the Subaru Tribeca B9 worth buying used? +
The Subaru Tribeca B9 is a good choice as a used car — 1 of 1 engine variants are rated 'Good Choice'.
What horsepower variants are available for the Subaru Tribeca B9? +
The Subaru Tribeca B9 is available with engine variants from 258 to 260 hp. Petrol: EZ36 (3.6L H6).

Last updated: February 2026 · All information without guarantee