Vauxhall Signum (2003 – 2008) Review

Vauxhall Signum (2003 – 2008) At A Glance


+Plushly equipped alternative to an executive saloon. Versatile rear seating, stacks of room and some decent engines. Cheap to buy.

-Lacks the driver satisfaction and image of a proper executive saloon. V6 TDI is oddly tardy. ESP is too intrusive.

On average it achieves 93% of the official MPG figure

Car seat chooser

Child seats that fit a Vauxhall Signum (2003 – 2008)

Our unique Car Seat Chooser shows you which child car seats will fit this car and which seat positions that they will fit, so that you don't have to check every car seat manufacturer's website for compatibility.

Which car seat will suit you?

Real MPG average for a Vauxhall Signum (2003 – 2008)


Real MPG was created following thousands of readers telling us that their cars could not match the official figures.

Real MPG gives real world data from drivers like you to show how much fuel a vehicle really uses.

Average performance


Real MPG

22–56 mpg

MPGs submitted


Diesel or petrol? If you're unsure whether to go for a petrol or diesel (or even an electric model if it's available), then you need our Petrol or Diesel? calculator. It does the maths on petrols, diesels and electric cars to show which is best suited to you.

Satisfaction Index

Satisfaction Index What is your car like to live with?

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Ask Honest John

Do we have to accept our car being written off?
"Someone ran into the back of our 2004 Vauxhall Signum. The insurers have written it off as it's going to cost £1800 to fix. Can we put our foot down and tell them we want it repaired? They are also taking the courtesy car back which leaves us with nothing."
As this incident is not your fault, your lawful entitlement is here: As long as the repair cost are less than the market value, you can insist on the vehicle being repaired. With repair costs at £1800, it will be a total loss as I doubt your car is worth more unless it's high spec and low miles. Your insurance covers you "up to" the market value of your car. If the repair cost are more, then unfortunately your car is a total loss and you will have to accept that fact. What you do not have to accept is the market value offered, check in the marketplace to make sure the settlement is reasonable. You're also entitled to an alternative vehicle until which point settlement is agreed. A reasonable time should be given in the interim to source another vehicle.
Answered by Tim Kelly
Vauxhall Signum fault codes - what do they mean?
"I own a Vauxhall Signum diesel 2006 plate. The engine management lights keeps coming on when I floor it or press down quick on the accelerator. The car/spanner light comes on at other times but not together. I've taken it to a local garage and the fault codes P0023 and P0400 and P0235 come up. I have paid out money for the codes to reset and the problem hasn't gone away. I took it to a diesel specialist and they can't pinpoint what's wrong. Changed mass air flow sensor and new diesel filter and air filter. Cleaned with EGR valve cleaner about four times. Not much change. Taken EGR valve out and cleaned. Not much change ether. Any ideas? "
This engine was also fitted to SAAB 9-5s and they are infamous for EGR related problems:
Answered by Honest John
Is my car legal without a DPF?
"I've removed the DPF and EGR from my Vauxhall Signum, due to constant engine problems. Is the car legal if the model is pre-2008?"
No. If the vehicle was originally fitted with DPF and EGR it is illegal to remove them. Dates have nothing to do with it.
Answered by Honest John
What do you think of the Vauxhall Signum?
"What are your opinions of a Vauxhall Signum as an alternative to an estate? I am 6-feet 5-inches so am concerned that in a small estate, the person/child behind me will have zero legroom."
Horrible handling, intrusive ESP and a sort of plastic tower thing between the front seats that rattled even when the cars were new. Best avoided, especially the dire 1.9-litre diesel. A Skoda Superb Mk 1 or Mk II makes more sense.
Answered by Honest John

What does a Vauxhall Signum (2003 – 2008) cost?