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Subaru Impreza Hatchback (2017-2020) running costs and reliability

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Running costs rating: 3 out of 53.0

Written by James Dennison Updated: 2 June 2023

Miles per pound (mpp)

Low figures relate to the least economical version; high to the most economical. Based on WLTP combined fuel economy for versions of this car made since September 2017 only, and typical current fuel or electricity costs.
Petrol engines 5.3 mpp
What is miles per pound?

Fuel economy

Low figures relate to the least economical version; high to the most economical. Based on WLTP combined fuel economy for versions of this car made since September 2017 only.
Petrol engines 35.9 mpg
View mpg & specs for any version
  • Below-par claimed fuel economy
  • Extensive warranty
  • Residual values strong due to rarity

Habitual Subaru Impreza owners are used to relatively poor fuel economy, focusing more on the vehicle’s all-wheel drive capability and rugged reputation.

When changing from a familiar diesel hatchback, you’ll want to look at the claimed fuel consumption figures first. Lagging far behind the class leaders, the Impreza’s 1.6-litre engine claims 44.1mpg, with the 2.0-litre at 42.8mpg. In the real world the larger engine is the better choice, but expect both to average less than 40mpg in British traffic.

Excellent reliability should make running the Impreza a worry-free experience, plus servicing costs should not be excessive. The headline five-year/100,000-mile warranty is impressive, although it should be highlighted that only the powertrain (engine and gearbox – excluding clutch drive plate) is guaranteed for the full period.

When buying used, look for an extended warranty as the rest of the car is only good for three years and 60,000 miles – whichever comes first.

Both of the engines on offer in the Subaru Impreza emit far more CO2 than the class leaders. Even the smaller 1.6-litre engine – despite producing a relatively small power figure – emits 145g/km of CO2. Opt for the larger 2.0-litre engine and this increases to 152g/km of CO2.

Subaru Impreza servicing and reliability

  • Subarus are known for their toughness
  • Reliability should be sound
  • Cabin feels built to last

According to the Japanese manufacturer, 99.3% of Subarus registered in the UK are still on the road after ten years. And while it may not shift the largest volume of vehicles, such a record is impressive by any brand’s standards.

The five-year/100,000-mile warranty shows that Subaru is confident in its products, and we have no reliability concerns when it comes to the fifth-generation Impreza. The cabin feels sturdy and well made, meaning the usual family car trial by children and pets should be a walk in the park for the Subaru.