Vauxhall Astra Twintop problems, reliability and years to avoid
If you are considering buying a used Vauxhall Astra Twintop, these are the common problems worth knowing about first. Our garage database tracks 2 known faults for this model, 1 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 Vauxhall Astra Twintop reliable?
The Vauxhall Astra Twintop has 2 known faults in our database, 1 of them rated high severity. The most serious are engine (on the 1.9 CDTi the timing belt drives the water pump) and electrics (the three-piece electro-hydraulic folding roof gives trouble with its electronics). 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 Vauxhall Astra Twintop 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
2006 to 2011, 1.9 CDTi diesel (150PS): on the 1.9 CDTi the timing belt drives the water pump
Each one is set out in full below, with the symptoms, the typical mileage and a rough repair cost.
Generation 1 of 12 known faults · 1 owner report · 5 good notes
Vauxhall Astra Twintop Astra H (2006 to 2011) problems
ElectricalMedium severity📝 Editorial
The three-piece electro-hydraulic folding roof gives trouble with its electronics, hydraulics and motors. By September 2007 two serious roof and window failures had been reported, Vauxhall issued a service bulletin for roof mechanism work in February 2008, and roof faults have been traced to faulty wiring harnesses, cured by replacing the harness. A 38,000 mile 2007 car needed two new roof motors in June 2013 for £807 (the motors alone are £299 each), and a June 2017 report describes the rear windows stopping about three inches short of closed.
Rough guide
£300-1500
Typical symptoms
roof stops part way through opening or closing
trim strips sticking or catching as the roof moves
rear side windows not closing fully
creaks and rattles from the roof
Affected vehicles
Engines:
All
🔍 We have a specific pre-purchase check for this faultCheck an advert →
Engine/EmissionsHigh severity📝 Editorial
On the 1.9 CDTi the timing belt drives the water pump, and a pump that seizes can fling the belt off in as little as 40,000 miles and wreck the engine. Failed timing belts, often because the water pump seized, are listed among this diesel's common problems, so the belt, tensioner, pulleys and water pump need replacing together every 40,000 miles.
Rough guide
£400-2000
Typical symptoms
whine or grinding from the belt end of the engine
coolant weeping from behind the timing cover
engine cuts out and will not restart
Affected vehicles
Engines:
1.9 CDTi diesel (150PS)
Typical mileage:
40000+ miles
🔍 We have a specific pre-purchase check for this faultCheck an advert →
What owners report on the Astra H
1 single report, 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.
Bodywork · June 2013The roof trim strips on a 2007 Astra Twin Top with 38,000 miles were sticking, requiring two new motors for a repair cost of £807.
What owners like about the Astra H
5 notes
The Astra TwinTop is a good-looking coupe cabriolet, available with various petrol and diesel engines, and was sensibly priced.
The 2.0 Turbo engine variant of the Astra TwinTop offers a very good driving experience.
The three-piece electro-hydraulic roof can be raised or lowered in under 30 seconds, even when the car is moving up to 18mph.
Exclusiv and Exclusiv XP models feature heated leather front seats and keyless entry as standard equipment.
The Astra Twintop offers a range of engines, including 1.8VVT (140PS) and 2.0-litre Turbo (200PS) petrol units, plus a 1.9CDTi (150PS) diesel.
Sellers rarely admit these faults outright
We track 6 specific phrases sellers use in adverts to soft-pedal these exact issues. Paste any Vauxhall Astra Twintop advert and we check it in seconds.
On the 1.9 CDTI the timing belt drives the water pump, and a seized pump can throw the belt in as little as 40,000 miles and wreck the engine; by December 2008 this was increasingly common at about four years old and 50,000 to 60,000 miles. Belt, tensioner, pulleys and water pump every 40,000 miles, and never a belt without the pump: a 2013 owner explains that a new belt's tension wears an old pump bearing very quickly. The same engine is in the Zafira, Vectra, Signum, Saab 9-3 and 9-5 and Suzuki SX4.
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: October 2026
Vauxhall Astra Twintop buying questions
Which Vauxhall Astra Twintop years should I avoid?
No Vauxhall Astra Twintop year is a write-off, but the Astra H (2006 to 2011) carries the most serious faults: engine. 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 Vauxhall Astra Twintop?
Ask the seller about the engine and electrics faults on this page and whether they have been fixed, with invoices. On the test drive watch for whine or grinding from the belt end of the engine and roof stops part way through opening or closing. Read the MOT history for repeat advisories, then paste the advert into the free check, which reads it against its known faults before you travel. Check a Vauxhall Astra Twintop advert →
What is the real MPG of a Vauxhall Astra Twintop?
Owners report 36.8 mpg on average across the Vauxhall Astra Twintop engines with data, about 88% 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 160 owner submissions. Vauxhall Astra Twintop Real MPG by engine →
Where this Vauxhall Astra Twintop fault data comes from
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 Vauxhall Astra Twintop 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.
Knowing what a Vauxhall Astra Twintop goes wrong with is half of it. The rest is reading the advert and checking the car's history before you hand any money over.