CARFIX

TRW Disc Brake Rotor DF4949S

TRW — TRW Disc Brake Rotor DF4949S — part number DF4949S

TRW · Part number DF4949S · NZ$322.00 incl. GST

For your high-performance Subaru Impreza WRX and STi, quality disc brake rotors are absolutely crucial, providing the vital surface for your brake pads to clamp onto, turning all that kinetic energy into heat and bringing your beast to a safe, controlled stop.

Price

NZ$322.00 including GST. Part number DF4949S.

Fits these vehicles

Description

Disc Brake Rotor Replacement Guide — Keepin' Your Impreza Sharp!
> Alright, let's talk rotors, because for a Subaru Impreza WRX or STi, these aren't just any old bits of metal — they're the unsung heroes of your braking system. When you're pushing your Subie hard, whether on the open road or a sneaky track day, those rotors take a serious hammering. They're designed to dissipate the massive heat generated during braking, but extreme thermal stress can lead to all sorts of grief — warping, cracking, or just plain wearing out. And when that happens, your braking efficiency and safety go right out the window, which is a big no-no for you and your prized Impreza.
Symptoms That Led You Here
• A bit of a shimmy or shake through the brake pedal or steering wheel when you hit the stoppers.
• Feeling like you need a bit more road to pull up, or a general drop in braking performance.
• Any squealing, grinding, or scraping noises — not the good kind of engine noise!
• You can actually see scoring, grooves, or even cracks on the rotor surface.
• That tell-tale burning smell after some enthusiastic braking.
Will it pass WOF?
No. Severely worn, warped, or cracked brake rotors will cause your vehicle to fail a Warrant of Fitness (WOF) inspection in New Zealand. Effective braking is a critical safety requirement.
DIY or Workshop?
Difficulty: 6/10 (Intermediate)
Estimated Time: 1-2 hours per axle
Tools Required: Jack and jack stands, wheel nut wrench, brake caliper compression tool, socket set, torque wrench, brake cleaner, wire brush, and potentially an impact wrench.
Expert Recommendation
Bob at CARFIX reckons you should swap out those brake rotors when they're looking a bit tired, showing wear beyond the manufacturer's specs, or if you're getting that tell-tale pulsing and noise that screams 'warped!' This is absolutely critical for performance beasts like the Subaru Impreza WRX and STi — your braking integrity isn't just about safety, it's about keeping that driving dynamic exactly where you want it. The TRW brake rotor is a fantastic choice, known for its quality and rugged performance, making it a reliable option for these demanding applications. Bob @ CARFIX is always on hand to help you work out exactly what part you need for your Subaru Impreza. Make sure you head over to Bob's Shop for a chat!
Fitment Notes
These rotors are specifically designed for various Subaru Impreza models, including the high-performance WRX and STi variants from 2001 through to current models. Always double-check the exact year, sub-model, and engine size to ensure correct fitment, as brake component specifications can vary significantly even within the same model range, particularly between standard Impreza and the more powerful WRX/STi versions.

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🛠️ Bob's Pro Tip: Do the Job Right!
> If you're swapping out these disc brake rotor, don't skimp on proper workshop preparation and safety products. Doing the job right the first time protects your investment, saves massive workshop labor fees, and guarantees a quiet, smooth ride!

🧰 What Else You'll Need:
• Safety First: Never work under a vehicle supported only by a jack. Always secure it on heavy-duty safety jack stands.
• Brake Dust Protection: Keep a pack of Nitrile Gloves handy to protect your hands from grease and dust.
• Clean and Prep: Use Brake Cleaner to clean the anti-corrosion shipping oil off the new rotors before mounting the calipers.
• Lubrication: Apply caliper grease to caliper slide pins and pad contact points to prevent squealing.