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Before you buy a used Opel Vectra C / Signum.

2002–2008 · Petrol / Diesel · 3 engines

Taken only from Testigo's sourced sheets. Use it to question the seller and on the test drive: it does not confirm that any particular car is affected.

Opel Vectra C / Signum, real photo of this generation
Rudolf Stricker · CC BY-SA 3.0 · Wikimedia Commons · Photo source

The essentials.

Typical faults by engine

The period and mileage are those mentioned by each sheet's sources. They are not a maintenance interval and do not predict that any particular car will fail.

All versions

Sheets the catalogue links to all 3 of its engines.

  • M32 manual gearbox bearingsGearbox
    Period mentioned
    2004–2019
    Mileage mentioned
    The sheet does not mention a mileage.

    Applies if: Only if fitted with the M32 six-speed manual (common on six-speed turbo and diesel versions); confirm by VIN.

1.8 / 2.2

Petrol

  • Vectra C ECC unit battery drainElectrical and electronic systems
    Period mentioned
    Bulletin-specific period and equipment stated in each assignment.
    Mileage mentioned
    The sheet does not mention a mileage.

    Applies if: Only Vectra C with ECC climate control, partial VIN range 21000015–21031422 described by HELLA, unit S3.10/S3.12. Not the Signum or units with different equipment; confirm the full VIN.

1.9 CDTI

Diesel

3.0 V6 CDTI

Diesel

  • Vectra C charge-air hose crackingPowertrain and engine management
    Period mentioned
    Bulletin-specific period and equipment stated in each assignment.
    Mileage mentioned
    The sheet does not mention a mileage.

    Applies if: Only Vectra C model year 2006–2008 with turbocharger/intercooler and the upper hose geometry described by HELLA; check the physical configuration. Not the Signum, for which this sheet does not prove application.

Which engine has the fewest documented faults?

Documented faults and recalls by engine for the Opel Vectra C / Signum
EngineDocumented faults
1.8 / 2.2Petrol22 with conditions
1.9 CDTIDiesel21 with conditions
3.0 V6 CDTIDiesel22 with conditions

According to the data we have, all its engines have the same number of documented faults.

By fuel type, the one with the fewest documented faults is: Petrol.

We only count the sourced sheets we have. An engine with fewer is not guaranteed to be more reliable: it may have been studied less or sold in smaller numbers.

Official recalls: ask before you pay

We have no official recalls on record for this model. Our list is not complete: ask anyway, with the chassis number.

  1. Ask the seller for the chassis number (VIN): it has 17 characters, appears in the car's documents and can usually also be seen at the base of the windscreen.
  2. Ask an official Opel dealer, or the brand's official website if it lets you check by chassis number, whether each recall has been done or is still outstanding for that VIN.
  3. Manufacturer recalls are normally carried out free of charge by the official service network. If one is outstanding, ask for it to be done before you close the sale.

On the test drive: what to look and listen for

Taken from each sheet's symptoms and checks. You can tick off what you have already looked at: it is saved only in this browser.

0 of 4 checked

Intake / EGR / flywheel

  • Look out for: Power loss, rough idle and an engine light with “swirl actuator malfunction”; soot around the intake manifold; vibration and knocks in low gears (dual-mass flywheel).

    Ask them to check: Check the rod and flap operation on top of the manifold, read actuator codes, inspect the EGR and listen to the flywheel when starting and stopping.

Electrical and electronic systems

  • Look out for: The source describes the risk stated under cause; it does not document DTCs or additional advance symptoms.

    Ask them to check: Confirm ECC and VIN; check S3.10/S3.12 software label and prior replacement before repair.

Gearbox

  • Look out for: A whine that rises with speed, mainly in 5th and 6th (also in 1st and 2nd), a loose gear lever that moves on and off the throttle and, when advanced, gears jumping out. Left unrepaired, the bearing can break through the casing.

    Ask them to check: In a garage test: confirm whether the noise depends on road speed (wheel bearing, tyre) or the gear engaged (gearbox), and whether the lever moves under load. Check the oil for metal debris. Repair early: replacing all bearings and fitting the revised end case costs far less than a new gearbox.

Powertrain and engine management

  • Look out for: The source describes the risk stated under cause; it does not document DTCs or additional advance symptoms.

    Ask them to check: Inspect the upper intercooler hose and routing; replace if damaged with an adequate bending radius.

Sources

Every fact on this page comes from these Testigo sheets and their original sources. Sources are not checked in real time.

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