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Every drive starts with one critical element: fuel delivery. Without a strong, reliable gas tank assembly, your WRX STI’s performance can’t reach its true potential. The 15-21 WRXSTI GAS TANK FUEL CELL ASSEMBLY OEM is more than just a container for fuel—it’s the backbone of your Subaru’s power system, designed to feed your turbocharged engine the fuel it demands while maintaining safety, precision, and OEM reliability.
Whether you’re daily driving, carving through mountain roads, or pushing limits at the track, this genuine Subaru fuel assembly ensures you get the consistent performance and factory fitment your WRX STI deserves.
Fuel delivery is often overlooked until problems arise. A cracked tank, faulty connections, or clogged lines can leave you stranded—or worse, compromise safety. With the 15-21 WRXSTI GAS TANK FUEL CELL ASSEMBLY OEM, you don’t just replace a part—you restore your Subaru’s factory-engineered fuel system.
Here’s why this assembly is critical:
Engineered for Precision: Maintains the correct fuel pressure and delivery.
Durable OEM Construction: Built to handle daily use and aggressive driving conditions.
Safety First: OEM design prevents leaks, evaporation, and dangerous failures.
Perfect Fitment: No modifications required—direct bolt-on installation.
Long-Term Reliability: Designed by Subaru to endure years of performance driving.
When fuel delivery is consistent, everything else—from throttle response to horsepower output—falls into place.
Unlike aftermarket alternatives, this is a genuine Subaru OEM component designed specifically for WRX STI models from 2015 to 2021.
OEM factory-grade construction.
Designed to fit seamlessly with all factory fuel lines and sensors.
Maintains Subaru’s factory specifications for flow, safety, and efficiency.
Resistant to corrosion, impact, and long-term wear.
Optimized for both stock and performance-tuned WRX STIs.
With the 15-21 WRXSTI GAS TANK FUEL CELL ASSEMBLY OEM, you can be confident your Subaru is performing exactly as intended—no compromises, no shortcuts.
Even the strongest fuel systems wear over time. Here are key signs your WRX STI may need a new fuel cell assembly:
Strong smell of fuel around the rear of the vehicle.
Visible cracks, dents, or rust on your current tank.
Inconsistent fuel pressure affecting performance.
Check engine light linked to evaporative emissions.
Fuel leaks or poor fuel economy.
If any of these sound familiar, it’s time to restore reliability with a 15-21 WRXSTI GAS TANK FUEL CELL ASSEMBLY OEM.
Installing the 15-21 WRXSTI GAS TANK FUEL CELL ASSEMBLY OEM is a detailed but straightforward process when handled by a skilled mechanic or experienced DIYer.
Safely lift and secure the Subaru before beginning.
Disconnect fuel lines, electrical connections, and straps holding the old tank.
Lower and remove the old assembly.
Install the new OEM gas tank fuel cell assembly with correct torque specifications.
Reconnect lines and sensors, ensuring no leaks or misalignments.
Test the system for proper fuel delivery before driving.
Because fuel systems are sensitive, many owners choose professional installation for peace of mind.
The 15-21 WRXSTI GAS TANK FUEL CELL ASSEMBLY OEM isn’t just for broken tanks—it’s also essential for:
Performance Builds: Ensures consistent fueling at high power levels.
Restorations: Restores your WRX STI to factory condition.
Track Use: Withstands high demand during aggressive racing conditions.
Daily Drivers: Maintains OEM safety and reliability for long commutes.
Wouldn’t you want the peace of mind knowing that your Subaru’s fuel system is operating at factory-engineered precision?
Q1: Does this fit both WRX and WRX STI models?
A: This part is designed specifically for WRX STI models from 2015–2021. If you have a standard WRX, check fitment details before ordering.
Q2: Why choose OEM over aftermarket fuel tanks?
A: OEM ensures perfect fitment, safety-tested durability, and compatibility with Subaru’s engineering. Aftermarket options often require modifications and may not meet factory safety standards.
100% Authentic Subaru OEM Parts – Never replicas, always genuine.
Subaru Enthusiast Experts – Our team lives and breathes Subarus.
Fast Shipping & Secure Packaging – Get back on the road faster.
Trusted by Subaru Owners Nationwide – Proven reliability and support.
At Genuine Subie Parts, we understand your WRX STI isn’t just a car—it’s a passion. That’s why every part we sell is backed by Subaru quality and enthusiast knowledge.
When upgrading your fuel system, it’s smart to inspect and consider:
Fuel Pumps – Keep consistent flow at all power levels.
Fuel Pressure Regulators – Maintain factory-correct fuel pressure.
Fuel Injectors – Optimize delivery for performance builds.
Fuel Lines and Fittings – Replace worn connections to prevent leaks.
Evap System Components – Ensure emissions compliance and safety.
Pairing these with your 15-21 WRXSTI GAS TANK FUEL CELL ASSEMBLY OEM gives you a fully refreshed and reliable fuel system.
The WRX STI is known for power, reliability, and performance—but none of that is possible without a fuel system that works flawlessly. By choosing the 15-21 WRXSTI GAS TANK FUEL CELL ASSEMBLY OEM, you’re ensuring:
Maximum reliability in daily and performance driving.
Confidence that your Subaru is operating to factory standards.
Safety, durability, and performance engineered by Subaru themselves.
For true Subaru enthusiasts, this isn’t just a replacement part—it’s peace of mind under every mile.
Your Subaru WRX STI deserves the best, and that starts with a solid foundation in its fuel system. The 15-21 WRXSTI GAS TANK FUEL CELL ASSEMBLY OEM restores confidence, eliminates leaks, and delivers consistent fuel supply so your turbocharged engine can perform the way Subaru intended.
Don’t gamble with aftermarket alternatives or risk safety with worn-out components. Choose the OEM solution trusted by Subaru engineers and enthusiasts alike. With Genuine Subie Parts, you’re not just buying a part—you’re investing in reliability, performance, and the driving experience you love.
The product might show a few cosmetic signs of usage, but it works perfectly and operates as expected.
Part Number: 42012FJ041
Supersession(s): 42012FJ040
