If you are considering buying a used Saab 9-5, these are the common problems worth knowing about first. Our garage database tracks 6 known faults for this model, 3 of them rated high severity. Every one below is a repair bill a seller has good reason not to mention.
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Is the Saab 9-5 reliable?
The Saab 9-5 has 6 known faults in our database, 3 of them rated high severity. The most serious are engine (the 2.0 and 2.3 four-cylinder turbo petrols (B205 and B235) are prone to oil sludge) and engine (the 1.9 diesel is delightful to drive but gives a lot of problems). None of them makes the car a bad buy on its own; the risk is a seller who knows and says nothing.
That is a count of the faults we hold, not a reliability score. Popular cars get written about more, and a newer generation has had less time to show its faults.
Which Saab 9-5 years should you avoid?
No year is a write-off on its own. What matters is which serious faults a given year and engine can have, and whether the car in front of you has had them fixed.
Years and engines with a serious known fault
1997 to 2009, 2.0 and 2.3 four-cylinder turbo petrol (B205 and B235): the 2.0 and 2.3 four-cylinder turbo petrols (B205
2006 to 2009, 1.9 TiD diesel (the Fiat/GM 1.9 JTD), manual and automatic: the 1.9 diesel is delightful to drive but gives a lot of problems
1997 to 2009, Aisin-Warner automatic gearbox: the 9-5's Aisin-Warner automatic gearbox is prone to failure
Each one is set out in full below, with the symptoms, the typical mileage and a rough repair cost.
Generation 1 of 16 known faults · 5 owner reports · 8 good notes
Saab 9-5 Mk1 (1997 to 2009) problems
Engine/EmissionsHigh severity📝 Editorial
The 2.0 and 2.3 four-cylinder turbo petrols (B205 and B235) are prone to oil sludge. The oil feed to the balancer shaft sprocket sludges up, and carbon from oil cooked by the exhaust running close to the sump can block the sump pick-up; the oil light only comes on once pressure is lost completely, which is usually too late. Sludge reports led Saab to issue an eight-year engine warranty in early 2005, and a breather update in 2004 addressed it, but the advice is still oil and filter every 5,000 to 6,000 miles, drained from the sump plug rather than siphoned, and a careful listen for timing chain rattle. Dealers cleared a blocked pick-up as a separate 150 pound job.
Rough guide
£150 for a dealer sump pick-up clean, 2000-4000 for an engine
Typical symptoms
rattle from the timing chain, especially from cold
black sludge under the oil filler cap
oil pressure warning that only comes on once pressure is lost, usually too late
sudden engine failure
Affected vehicles
Engines:
2.0 and 2.3 four-cylinder turbo petrol (B205 and B235)
Typical mileage:
60000+ miles
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Engine/EmissionsHigh severity📝 Editorial
The 1.9 diesel is delightful to drive but gives a lot of problems: inlet manifold swirl flaps that soot up and seize or break and are ingested by the engine, failed EGR valves, choked DPFs, timing belts thrown off by a seized water pump in as little as 40,000 miles (belt, tensioner, pulleys and pump every 40,000 miles), failed oil pumps, alternators, dual mass flywheels, turbos and throttle bodies. On automatics the heat exchanger in the radiator fails and lets coolant into the transmission fluid, wrecking the gearbox; on cars just out of warranty Saab usually contributed 40%. The ECU should have the later software developed for town driving, because DPF regenerations are triggered by the pressure drop across a clogging filter.
Rough guide
£500-4000
Typical symptoms
limp mode and loss of power, especially after short runs
DPF or engine warning light
smoke and a sudden loss of power when the swirl flaps soot up and seize
gearbox fluid looking milky or coolant looking oily on automatics
Affected vehicles
Engines:
1.9 TiD diesel (the Fiat/GM 1.9 JTD), manual and automatic
Typical mileage:
40000-100000 miles
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Transmission/ClutchHigh severity📝 Editorial
The 9-5's Aisin-Warner automatic gearbox is prone to failure. A friction-fitted metal bush that holds one of the gears can creep along its shaft, upsetting the fluid supply to the torque converter, and in reverse it can engage forward and reverse ratios at once, burning out the clutches inside.
Typical symptoms
harsh, delayed or juddering engagement of reverse
slipping or flaring gearchanges
gearbox failing to drive
Affected vehicles
Engines:
Aisin-Warner automatic gearbox
Typical mileage:
unknown miles
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ElectricalMedium severity📝 Editorial
Ignition coils failed on 2001 cars, and a failed coil can damage the catalytic converter, a bill of over £700. Saab's 1577 campaign in 2008 and 2009 replaced ignition discharge modules to head off a possible module fault, though a replacement module could itself be faulty. One more owner had the ignition cartridge fail.
Rough guide
£700
Typical symptoms
misfire or rough running
engine warning light
loss of power
Affected vehicles
Engines:
Petrol engines (ignition discharge module)
Typical mileage:
unknown miles
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OtherMedium severity📝 Editorial
Saab cut the price of a replacement air conditioning compressor from £700 to £180 after a spate of compressor failures on 2001 and 2002 cars, on both the 9-5 and the 9-3.
Rough guide
£180-700
Typical symptoms
air conditioning blowing warm
noise from the compressor, or its clutch not engaging
Affected vehicles
Engines:
All engines
Typical mileage:
unknown miles
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ElectricalMedium severity📝 Editorial
The 9-5's trip computer display (SID) can fail, and putting it right can cost £500, though a cheaper DIY repair is documented. Two owners had the display unit fail, one paying for it and one covered by warranty. On 3.0 V6 diesels Saab also replaced the display under a service bulletin because dots in it failed to light.
Rough guide
£500
Typical symptoms
missing dots or lines in the trip computer display
trip computer display blank or unreadable
Affected vehicles
Engines:
All engines
Typical mileage:
unknown miles
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What owners report on the Mk1
5 single reports, unconfirmed
One owner each, in their own words rewritten as a line, and not counted in our risk scoring. A fault joins the list above once a second report or an editorial source backs it.
Fuel system · June 2018A Saab 9-5 experienced a sticking fuel gauge when approximately a quarter full, caused by a loose fuel tank baffle jamming the sender unit float.
Brakes · May 2016A 2007 Saab 9-5 Aero estate at 60,000 miles had recurring ABS, brake, and warning lights, with occasional grinding or creaking from the brakes.
Bodywork · June 2012There was a reported shortage of replacement rear screens available for the Saab 9-5 model.
Engine · July 2011Poor performance in a 2.2 diesel engine can be attributed to a faulty solenoid within the EGR valve.
Engine · June 2011Failed throttle bodies were also identified as a problem affecting the vehicle's operation.
What owners like about the Mk1
8 notes
The seats in this model are widely regarded as being very comfortable by most users.
The model achieved a four-star 31-point NCAP crash test rating, ranking highly among executive cars.
The estate version, available from early 1999, was considered a highly safe estate car.
The year 2000 model achieved an impressive 91% overall score in NCAP crash safety tests.
The 'R' registration model ranked 14th from the top in a J.D. Power Customer Satisfaction Survey.
The make was joint third in a 2002 'Which?' reliability survey for cars from 2000 to 2002.
The model received a 5-star NCAP rating in the 2003 safety test, indicating high protection levels.
A 2004 'Which?' survey found 98% of cars up to two years old were breakdown-free over the preceding 12 months.
Other years0 known faults · 2 owner reports
Other Saab 9-5 years: owner reports
What owners report
2 single reports, unconfirmed
One owner each, in their own words rewritten as a line, and not counted in our risk scoring. A fault joins the list above once a second report or an editorial source backs it.
Electrics · June 2019A Saab 9-5 experienced a satellite navigation system failure, which was subsequently fixed by an independent specialist.
Electrics · January 2017A 2010 Saab 9-5 with 30,000 miles had its satellite navigation system repeatedly revert to Belgium and set its clock to Belgian time.
Sellers rarely admit these faults outright
We track 15 specific phrases sellers use in adverts to soft-pedal these exact issues. Paste any Saab 9-5 advert and we check it in seconds.
On the 1.9 TiD the belt drives the water pump, and a seized pump can throw the belt in as little as 40,000 miles and wreck the engine; the archive's rule is belt, tensioner, pulleys and water pump every 40,000 miles. A 2017 report describes a 9-3 convertible whose belt was changed at 69,000 miles without the pump, which seized seven months later and threw the belt; that report gives five years or 60,000 miles at most, so the row takes 40,000 miles or five years, whichever comes first.
Always confirm against the vehicle handbook. Intervals vary by engine, and several manufacturers revised theirs after failures in service.
Repair costs are typical UK ranges, not quotes. Actual cost depends on condition and garage.Data last verified: November 2026
Saab 9-5 buying questions
What are the most common Saab 9-5 problems?
Three stand out. Engine: the 2.0 and 2.3 four-cylinder turbo petrols (B205 and B235) are prone to oil sludge (typically 60000+ miles). Engine: the 1.9 diesel is delightful to drive but gives a lot of problems (typically 40000 to 100000 miles). Gearbox: the 9-5's Aisin-Warner automatic gearbox is prone to failure. The full list above is grouped by generation, with typical mileage and a rough repair cost for each.
Which Saab 9-5 years should I avoid?
No Saab 9-5 year is a write-off, but the Mk1 (1997 to 2009) carries the most serious faults: engine and gearbox. Year matters less than whether the specific car has had the known fixes, so check the history for them.
What should I check when viewing a used Saab 9-5?
Ask the seller about the engine and gearbox faults on this page and whether they have been fixed, with invoices. On the test drive watch for rattle from the timing chain, especially from cold, limp mode and loss of power, especially after short runs and harsh, delayed or juddering engagement of reverse. Read the MOT history for repeat advisories, then paste the advert into the free check, which reads it against all 6 known faults before you travel. Check a Saab 9-5 advert →
What is the real MPG of a Saab 9-5?
Owners report 33.1 mpg on average across the Saab 9-5 engines with data, about 93% of the official combined figure. The gap between official and real-world economy varies a lot by engine, so the Real MPG page lists every engine and generation separately, from 263 owner submissions. Saab 9-5 Real MPG by engine →
If you used to check the Honest John “Good & Bad” section before the site closed in 2026, this page is where that information now lives. We rebuilt the Saab 9-5 owner-report history from the archived Honest John dataset, added our own research, specialist and owner-club sources and DVSA recall data, and we keep it free. Each fault above is badged with its source. The same data feeds our free advert check, which reads a listing against every known fault for the exact engine and year.