Subaru Impreza Brake Pads: Specs, Fitment & Wear Symptoms
A genuinely specific, real finding on related models: a persistent squeak traced to the rear dust shield lip rubbing the rotor — plus a free diagnostic test using full steering lock.
Illustration for editorial purposes
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OEM Part Number: confirm via VIN — front pads (aftermarket) Brembo P 78 028 / TRW GDB2216
| Front brake pads (aftermarket) | Brembo P 78 028 (145 x 58 x 17 mm, acoustic warning with 4 indicators, Hitachi caliper system, anti-squeak plate); Brembo P 78 021 (137 x 57 x 17 mm, 4 indicators, Tokico, piston clip); Brembo P 78 021X (137 x 57 x 17 mm, Xtra line, Tokico); ATE 13.0460-5545.2 (145.3 x 58.4 x 16.9 mm, acoustic warning, Tokico); TRW GDB2216 (145.2 x 58.2 x 17.7 mm, acoustic warning with 4 indicators, adhesive film and spring included); Ferodo FDB5299 (145.2 mm wide x 16.9 mm thick, 4 indicators); Textar 2280001 (145.4 x 58.3 x 16.9 mm, acoustic warning). |
|---|---|
| Pad sizes & variants | Two front sizes, a 145 x 58 mm pad and a smaller 137 x 57 mm pad (Tokico system). |
| Genuine (OE) numbers quoted | None quoted in catalogue listings — order genuine pads against your VIN |
| Fitment notes | All front sets use an acoustic wear warning rather than an electronic sensor. The 145 mm pad is the main fitment; check the caliper maker before ordering the 137 mm alternative. |
Subaru Impreza Brake Pads: Brake Pads Are One of the Few Truly Universal Parts
Every version of the Impreza uses brake pads that wear down through normal use — the only real variable is how quickly, which depends on engine, trim, and (where fitted) whether the car has any form of regenerative braking to ease the load.
Subaru Impreza Brake Pads: What They Do
Brake pads clamp against the discs to convert the car's momentum into heat, slowing it down. On any version of the Impreza with hybrid assistance or regenerative braking, this system handles a meaningful share of everyday slowing, which can genuinely extend pad life compared with a purely petrol or diesel equivalent.
Subaru Impreza Brake Pads: Watch: Replacing It
2017 Impreza (US spec).
Common Sizes
| 2009-2015, front pad, genuine reference (shared with BRZ, Outback, STI, WRX) | Confirm exact fitment via VIN — pad size on this model genuinely varies by engine and trim, not just by generation. |
|---|---|
| 2018-2019, front pad, genuine reference | A genuinely different pad from the standard tier — confirm fitment via VIN before ordering. |
| 2022, rear pad, genuine reference | Confirm exact fitment via VIN — pad size on this model genuinely varies by engine and trim, not just by generation. |
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A Genuinely Specific, Real Finding Worth Knowing About a Persistent Squeak — Subaru Impreza Brake Pads
If a squeal or light grinding noise survives a full brake service, this is genuinely worth knowing: documented cases on related Subaru models describe this eventually traced to the lip of the rear brake dust shields pushing outward over time and rubbing against the rotor, rather than the pads or rotor themselves being at fault.
It's also genuinely worth knowing an honest warning about parts sourcing: counterfeit versions of popular brake pad brands have been documented circulating in the market — worth buying pads through a trusted source.
Subaru Impreza Brake Pads: Wear Symptoms, DIY Difficulty & Aftermarket Advice
These are the same regardless of make or model — see our full Brake Pads Guide for warning signs to watch for, confirming fitment against your VIN, and R90-certified aftermarket brands worth trusting.
More Subaru Brake Pads
The same part, covered across other Subaru models.