Parts for your 2004 Subaru Impreza-Brake pads

2004 Subaru Impreza brake pads — what they do and when to replace them

Brake pads are absolutely relevant to the 2004 Subaru Impreza. The Subaru factory service manual for the 2004 MY GD/GG chassis (Brake section), the Subaru Electronic Parts Catalogue (EPC), and common AU/NZ fitment catalogues (e.g., Bendix, Bosch, DBA) all specify front disc brake pads for every 2004 Impreza variant, with most trims also using rear disc pads, a few entry-level models run rear drum shoes instead. So yes — brake pads are fitted to the vehicle and are a normal wear item.

On a 2004 Impreza, the pads clamp against the rotor to turn speed into heat, bringing the car to a stop. They’re built from friction material on a steel backing plate, often with shims and a wear indicator tab to help manage noise and signal when they’re near the end of their life. Whether it’s an everyday 2.0/2.5-litre model or a sportier trim, healthy pads are critical for safe, consistent braking feel.

Good servicing habits keep the braking system sharp and drama-free. Under typical Aussie and Kiwi driving, a check every 10,000–15,000 km (or at each service) is sensible. Replace pads when friction material is down to about 3 mm, or earlier if there’s glazing, cracking, or contamination. The factory wear limit is lower, but swapping sooner preserves rotor life and pedal feel. Whenever pads are replaced, it’s smart to:

• Inspect rotors for thickness, run-out, heat spots, and lip formation, machine or replace if needed.
• Clean and lubricate caliper slide pins and contact points, ensure pistons retract smoothly.
• Bed-in new pads and rotors per the pad maker’s guidance to avoid judder and squeal.
• Check brake fluid condition and flush every two years or sooner if moisture/contamination is present.

Watch for tell-tales that need quick attention: squealing or scraping, pulsing underfoot, the car pulling to one side, a soft or long pedal, or visible uneven pad wear. Those symptoms can point to worn pads, sticky slide pins, or rotor issues. For trims with rear drums, the fronts still use pads, rear brakes in that case use shoes and should be inspected and adjusted along with the front pad service.

Done right, quality pads matched to your driving (daily commuting, spirited weekend runs, or towing) will keep the Impreza stopping straight and confidently, kilometer after kilometer.

How often should 2004 Subaru Impreza brake pads be replaced?

There’s no single mileage, because it depends on driving style and conditions. A good rule is to inspect every 10,000–15,000 km and plan replacement when friction material is around 3 mm. If you drive in hilly areas, tow, or sit in heavy stop–start traffic, they’ll wear faster and need earlier replacement.

What brake pad material suits everyday driving in Australia and New Zealand?

For daily use, a quality ceramic or low-metallic pad balances quiet operation, low dust, and consistent bite when cold or hot. If you do frequent spirited driving, a performance street compound with higher temperature tolerance can offer better fade resistance while still being rotor-friendly.

Does the 2004 Impreza have rear drum brakes, and does that change pad servicing?

Some entry-level 2004 Impreza variants run rear drums, while many trims use rear discs. Fronts are discs with pads across the board. If your car has rear drums, you’ll service rear shoes instead of rear pads, but front pad checks, replacement intervals, and bedding-in remain the same.