What is the gas mileage on a 2003 Subaru Impreza?

In brief, a 2003 Subaru Impreza typically achieves mpg in the low- to mid-20s in combined driving, with highway figures often in the upper 20s to low 30s depending on trim and transmission. Exact EPA estimates vary by configuration.

Understanding the 2003 Impreza lineup

The 2003 Impreza was offered in several trims, all with all-wheel drive as standard. The main differences came from engine choice, body style, and transmission. The popular 2.5-liter four-cylinder models included the RS, with either a manual or automatic transmission, as well as 2.5i and Outback Sport variants. Transmission choice and drivetrain have the biggest impact on mileage, alongside general wear and driving conditions.

EPA ratings by trim and transmission

The following figures reflect EPA estimates for common configurations from that model year. They are intended as a guide; actual mileage depends on maintenance, conditions, and driving.

Before listing, this paragraph explains the forthcoming figures: The numbers below provide typical EPA ratings for select 2003 Impreza configurations, focusing on common engine and transmission options. Use these as baseline references when evaluating an older Impreza.

• 2.5 RS with 5-speed manual: about 20 mpg in the city and 26 mpg on the highway (combined around 22 mpg).


• 2.5 RS with automatic transmission: about 19 mpg city and 24 mpg highway (combined around 21 mpg).


• 2.5i (base/outback Sport variants) with manual transmission: around 23–25 mpg city and 28–30 mpg highway (combined about 25–27 mpg).


• Outback Sport and other 2.5i models with automatic transmission: around 22–23 mpg city and 28–29 mpg highway (combined about 25–26 mpg).

Concluding paragraph after the list: These figures reflect standard testing conditions; real-world mileage can be higher or lower depending on driving style, tire choice, and maintenance. AWD typically imposes a modest efficiency penalty relative to front-drive configurations, especially in city driving.

Factors that affect mileage on a 2003 Impreza

Understanding why mileage varies helps interpret the numbers above. The following factors commonly influence real-world mpg on an older Impreza:

• Engine wear and maintenance: Regular tune-ups, clean air filters, and proper oil changes help sustain efficiency.


• Transmission type and condition: Manual transmissions generally yield better mpg than automatics in this era, particularly when the automatic is older.


• Tire size and pressure: Underinflated tires or non-stock tires can raise rolling resistance and lower mpg.


• AWD operation: Subaru's AWD adds weight and mechanical drag, reducing mpg versus front-wheel-drive rivals.


• Driving conditions: City driving with frequent stops reduces mpg compared to steady highway cruising; luggage and roof racks add drag.


• Climate and fuel: Cold starts and fuel quality can influence early-mileage efficiency; engine oil viscosity matters too.

Concluding paragraph after the list: By keeping the car well-maintained and adopting efficient driving habits, owners of 2003 Imprezas can maximize fuel economy within the constraints of an older, AWD vehicle.

Summary

In sum, a 2003 Subaru Impreza typically delivers roughly 22–27 mpg in combined driving, with highway estimates commonly in the upper 20s to low 30s and city figures in the low 20s. Specific numbers depend on trim, transmission, and vehicle condition. For precise figures, consult the original window sticker or EPA database entries for the exact configuration you own, and consider real-world testing or a professional assessment to gauge current efficiency. Maintenance, tire choice, and driving style remain the biggest levers for improving or preserving mpg on an aging Impreza.

How many miles does a 2003 Subaru Impreza last?

Engine Lifespan: Subaru engines are known for their durability and longevity, with many drivers reporting engines that last well beyond 200,000 miles with proper maintenance. The key to extending the lifespan of your Subaru engine is regular maintenance, including oil changes, fluid checks, and tune-ups.

What year to stay away from a Subaru Impreza?

Years to avoid for the Subaru Impreza include 2012 and 2013, which had issues with the transmission and other reliability problems. The 2008 model is also often cited as a year to avoid, though specific reasons aren't as widely mentioned in the provided results. If considering an older model, be wary of models from 1996-2005 that may have used engines prone to head gasket failure. 
You can watch this video to learn about common problems with the 2012-2016 Impreza: 59sMaxTheCarGuyYouTube · Jan 11, 2023
Years to avoid

• 2012: This model had issues with the transmission, particularly the continuously variable transmission (CVT), with some units potentially experiencing sudden acceleration. 
• 2013: A bad year for the Impreza due to multiple issues, including engine and transmission problems and low owner satisfaction scores from Consumer Reports. 
• 2008: Often listed as a year to avoid, it was the first year of the third generation and may have had specific drawbacks. 
• 1996-2005: These years, especially with the EJ25 engine, had a known issue with head gasket failures, leading to costly repairs. 

What to look for instead

• Post-2013 models: Generally, newer models have improved reliability, with the 2022 model being a good example. 
• 2015 or later CVTs: If buying a model with a CVT, 2015 or newer models generally had better versions of the transmission. 

This video discusses common problems in the 2011-2017 Impreza: 1m1A Auto: Repair Tips & Secrets Only Mechanics KnowYouTube · Jul 5, 2023

What is the fuel economy of a 2003 Subaru Impreza?

Highlights of the Subaru Impreza 2003
It has a petrol engine with a fuel economy range from 9.2L/100km to 11.5L/100km, depending on the model badge.

What is the most common problem with a 2003 Impreza?

Top 2003 Subaru Impreza Problems

• Oil Pump Seal May Leak.
• Oil leak from rear of engine due to failed plastic oil baffle plate.
• Improved clutch parts to correct clutch chatter.
• Oil Pump Seal May Leak.
• Technical service bulletin for ABS control module.
• Improved Spark Plug Wires for Misfire Issues.