Fault File
All models / All cars / Saloons & estates / Saab 9-3

Saab 9-3

All generations and engines together · 7,078 MOT tests in the 2025 data

Reliability verdict
DBy miles

Graded against its peers

Worse than most saloons and estates per mile driven. Watch suspension and brakes. A used buy worth some caution. Check the MOT history for repeating suspension advisories before you go.

First-time failure at 50-60k miles
22.5%
Across 311 tests. The average for saloons and estates is 16.8%.

Generation

Split by first-registration year. Cars registered in a changeover year can belong to either generation.

What owners report

Reported

Owner folklore from forums and the motoring press, with how well each report stands up. Most of it never shows up in an MOT, which is why this section exists at all.

Diesel timing belt, waterpump and swirl flap neglect

EmergingDiesel only (1.9 TiD/TTiD)

The 1.9 diesel needs its timing belt, tensioner, waterpump and auxiliary belt changed as a set, and owners who skip it are gambling: the waterpump can seize and take the belt with it, wrecking the engine. The same diesel is known for inlet manifold swirl flaps breaking up and getting ingested, plus EGR valves clogging and choking the DPF, both of which bring on a yellow engine light and a limp or smoky drive. Belt/pump work is due around every 5 years or 60,000 miles; a snapped belt job runs into four figures, an EGR valve replacement is more like £300-400.

Diesel engines only, check from 40-60k miles onward · sources: Honest John carbycar, MotorEasy Reliability Index

Automatic gearbox killed by a leaking heat exchanger

EmergingDiesel automatics only

On 1.9 diesel automatics, the transmission fluid heat exchanger sits in the radiator, and when it fails it lets engine coolant mix into the automatic transmission fluid. The result is contaminated ATF and a gearbox that can shift roughly or fail outright, with owners often finding out only once the damage is done. Replacing the heat exchanger is a moderate job, but a transmission that's already been run on coolant-contaminated fluid can mean a very expensive rebuild.

Diesel autos, any age once the heat exchanger corrodes · sources: Honest John carbycar

CIM steering column module failure knocking out ESP

Emerging

The steering column's electronic control module (CIM) houses the steering angle sensor, and when it fails it takes the ESP/traction control system down with it, which is enough to fail an MOT on its own. It's a repeatedly reported electrical fault across the range rather than something Saab (or GM, post-2010) ever issued a recall for. Watch for a permanently lit ESP or steering warning light; module replacement plus recoding isn't cheap, typically several hundred pounds at a specialist.

Reported across petrol and diesel models · sources: Honest John carbycar, Saab owner forums (SaabCentral, Saab Tech Talk)

2.0T petrol balance chain tensioner wear

Emerging2.0T petrol only

On the B207 2.0-litre turbo petrol, the plastic balance chain tensioner slipper is the part specialists point to first when a car develops a rattle from the timing cover, especially on cars that have had extended oil change intervals or the wrong oil grade. Left alone it can let the chain jump or shed debris into the sump. A cold start rattle that fades as revs rise is the classic tell; a full chain, guides and tensioner kit is a proper job, more than a day's labour plus parts.

2.0T petrol engines, more common past 80-100k miles on neglected examples · sources: Saab specialist forums (Trionic Tuning, SaabCentral)

Convertible roof hydraulics and switch failures

EmergingConvertible only

The 9-3 Convertible's folding roof relies on a hydraulic pump, ram and several micro-switches, and any one of them playing up can leave the roof stuck half open, half closed, or refusing to move at all. Owners report leaks from the hydraulic lines and pump wear as the roof ages, alongside sensor faults that stop the system completing its cycle. A full diagnosis and repair varies hugely depending on which part has failed, from a simple switch to a pump replacement running into four figures.

Convertible models, more common on higher-mileage or older cars · sources: Saab owner forums, convertible specialist parts suppliers

Rear suspension bush and mount wear

Partly in the MOT data

Owners have long complained about creaks and knocks from the rear suspension bushes, and about how hard genuine replacement bushes are to source once the car is older. The measured MOT data backs this up: suspension is the standout fault category for the 9-3, with claims data putting it well above other mechanical systems on this model. It's rarely a big single bill, more a steady trickle of bush and mount replacements as the car ages past 60-80k miles.

Reported from 60-80k miles · sources: Honest John carbycar, MotorEasy Reliability Index

What to check on this car

Ranked from this model’s own MOT record, then from what owners report.

Saveable checklist

From this model’s MOT record

The physical checks its own defect data says are worth your time, most telling first.

Underneath, with a torchRuns high on this model Get down and look at the sills, the subframes and the rear suspension mounting points. Flaking scale and bubbling matter; light surface rust does not. On older cars this is the one check that finds the fault that scraps them.Recorded on 17.7% of tests at age 10-15 · class average 4.3%
Rubber boots and gaitersRuns high on this model On full steering lock, look in behind each front wheel at the concertina rubber boots on the driveshafts and steering rack. Splits, or grease flung around the arch, mean dirt is getting into a joint that costs far more than the boot protecting it.Recorded on 11.3% of tests at age 10-15 · class average 1.4%
Coil springsRuns high on this model Look through the wheel spokes at the bottom coil of each spring; when springs snap it is usually there, and the break is visible. Step back and check the car sits level too. A dropped corner is often a broken spring.Recorded on 10.7% of tests at age 10-15 · class average 3.2%
LeaksRuns high on this model Look at the ground where the car usually stands, then glance under the engine after your test drive. Fresh drips of oil or coolant are the cheapest warning you will ever get about a car.Recorded on 8.0% of tests at age 10-15 · class average 4.8%
Brake pipes underneathRuns high on this model Follow the metal brake lines with a torch where they run along the sills and over the rear axle. White crust or flaking metal means they are corroding, and the online MOT history usually shows the same advisory creeping up for years before the fail.Recorded on 7.2% of tests at age 10-15 · class average 1.6%
ExhaustRuns high on this model Listen along the exhaust at cold idle for blowing or chuffing, and give the tailpipe a push to check nothing hangs loose. Small blows only get louder.Recorded on 6.4% of tests at age 10-15 · class average 2.2%
Bushes and ball joints Drive slowly over broken tarmac with the windows down and listen for clonks from either end. Back at the car, have someone rock the steering wheel while you rest a hand on each front wheel; play you can feel through the tyre is a worn joint.Recorded on 7.5% of tests at age 10-15 · class average 9.0%

Worth doing on any used car

These judge the seller’s upkeep rather than the model, and they are where the haggling money is.

Tyres, all four Check the tread across the full width of each tyre, inner edge included, and look for cracking and mismatched brands. A set of decent tyres is £500 or more on most cars, which makes this the easiest money to take off a price. If the pressure warning light is on, budget for sensors too.Recorded on 24.4% of tests at age 10-15 · class average 20.9%
Pads and discsRuns high on this model Look through the wheel spokes at the brake disc. A pronounced lip on its outer edge, or a rusty and scored face, means discs and pads are due all round, a few hundred pounds on most cars. A haggling point rather than a reason to walk away.Recorded on 19.2% of tests at age 10-15 · class average 11.4%
Windscreen and wipers Scan the glass in daylight for chips, especially in the driver's line of sight where even a small one can fail the MOT. Run the washers and check the wipers clear without smearing.Recorded on 3.5% of tests at age 10-15 · class average 2.6%

Because of what owners report

Drawn from the reports above rather than the MOT data. These are the model-specific ones.

Ask for proof the diesel's timing belt, tensioner and waterpump have been changed as a set (every ~5 years/60k miles). No record or an overdue belt is a real risk of a seized waterpump wrecking the engine.
On diesel automatics, check the gearbox dipstick or ask for the fluid to be checked. Milky, pink-tinged or burnt-smelling ATF points to coolant leaking in from the heat exchanger.
Turn the wheel lock to lock with the engine running and watch the dash. An ESP or steering warning light that won't clear suggests a failing CIM steering module, and it'll fail the MOT.
On 2.0T petrol cars, listen closely on a cold start before the revs settle. A rattle from the timing cover that fades as it warms up points to a worn balance chain tensioner.
On a convertible, cycle the roof open and closed twice from a stop. Hesitation, warning lights, or a roof that won't fully latch means hydraulic or switch problems, potentially expensive.
Watch for the engine management or EGR light on a diesel test drive, especially under load. A lit light or a flat spot under acceleration suggests EGR or DPF trouble already brewing.
Bounce each corner and get underneath to check the rear bushes and mounts. Knocking, creaking or visibly perished rubber is the 9-3's most common wear item and shows up heavily in the MOT data.

Open the saveable checklist, tick it off at the car

The MOT data

Measured

Computed from DVSA MOT results, all of Great Britain, 2025. Nothing here is opinion.

How this model wears

Saab 9-3Class average, all tracked models

What testers flag

Share of tests where each item was recorded. The dark tick is the class average across all tracked models; bars are scaled within each group.

Faults with the car itself

The rows that judge the model rather than its keeper. 7,078 tests in this band.

A suspension component excessively damaged or corroded
Advisory
23.4%class 7.8%
A suspension joint dust cover severely deteriorated
Minor
11.3%class 1.4%
A spring or spring component fractured or seriously weakened
Fail
10.7%class 3.2%
A suspension pin, bush or joint excessively worn
Advisory
10.5%class 10.8%
Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users
Advisory
8.0%class 4.8%
A brake hose ferrule excessively corroded
Advisory
7.2%class 1.6%
A spring or spring component fractured or seriously weakened
Advisory
6.7%class 5.0%
Exhaust system leaking or insecure
Advisory
6.4%class 2.2%
Lamp emitted colour, position or intensity not in accordance with the requirements
Advisory
4.2%class 1.1%
Play in steering rack inner joint(s)
Advisory
2.8%class 1.7%

Wear, upkeep and luck

Tyres, pads and stone chips say more about how the car was driven and maintained than about how it was built.

Tyre tread depth not in accordance with the requirements
Advisory
27.2%class 23.4%
Brake disc or drum excessively weakened, insecure or fractured
Advisory
19.2%class 11.4%
A tyre seriously damaged
Advisory
11.5%class 9.7%
A brake lining or pad worn below 1.5mm
Advisory
7.0%class 7.3%
Number plate inscription missing or illegible
Advisory
5.4%class 2.3%
A rear registration plate lamp or light source missing or inoperative in the case of multiple lamps or light sources
Minor
4.6%class 3.3%
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
Minor
3.5%class 2.6%
Brake disc or drum significantly and obviously worn
Advisory
3.3%class 2.8%

Others in its class

Same segment (Saloons & estates), best MOT record first. Compare before you shortlist.

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