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Fomoco E7120171 fuel injector
Fomoco E7120171 · Serviced & Flow-Tested

Mazdaspeed 3 / 6 / CX-7 2.3L DISI Turbo Fuel Injector Cleaning & Flow Testing

The Fomoco E7120171 is a GDI Turbo (direct injection) fuel injector used in Mazda 3 2.3L MZR DISI Turbo (2007-2013), Mazda 6 2.3L Turbo (2006-2007), CX-7 2.3L Turbo (2007-2011); MazdaSpeed platform. We ultrasonic-clean and flow-test injectors like this one in our shop, then send back before-and-after data so you know exactly what you're getting.

ManufacturerFomoco
Part numberE7120171
TypeGDI Turbo (direct injection)

Our measured results

These are the actual before-and-after numbers from our flow bench for the Fomoco E7120171 — not published estimates.

Tested in our shop4 injector(s) @ 120.0 psi
Measured coil (avg)1.4 Ω
10s open flow (avg)59.5 → 63.75 ml (+7.1%)
60s pulsed flow (avg)89.0 → 91.0 ml
Leak test after cleaning4/4 PASS

Also known as / cross-references

The Fomoco E7120171 is interchangeable with or cross-references to these part numbers:

L3K9-13-250AE7T-20171E7T20171

What vehicles use the Fomoco E7120171?

Mazda 3 2.3L MZR DISI Turbo (2007-2013), Mazda 6 2.3L Turbo (2006-2007), CX-7 2.3L Turbo (2007-2011); MazdaSpeed platform

How we service it

Every injector gets ultrasonic cleaning, backflushing, before-and-after flow testing (static and dynamic), leak testing, spray-pattern inspection, and new O-rings and micro-filter baskets where available — plus a detailed Injector Performance Report. Round-trip USPS shipping is $15 flat.

Frequently asked questions

What vehicles use the Fomoco E7120171 injector?
The Fomoco E7120171 is used in Mazda 3 2.3L MZR DISI Turbo (2007-2013), Mazda 6 2.3L Turbo (2006-2007), CX-7 2.3L Turbo (2007-2011); MazdaSpeed platform.
Can you clean and test a E7120171 injector?
Yes. We ultrasonic-clean, backflush, and flow-test the Fomoco E7120171 on our bench, including before-and-after open and pulsed flow, leak testing, and spray-pattern inspection, with new O-rings where available.
What did the E7120171 flow at?
On our bench, 4 E7120171 injectors averaged 59.5 ml open flow before cleaning and 63.75 ml after, tested at 120.0 psi.
How much does it cost?
Standard MPFI top-feed injectors are $30 each; side-feed, GDI, TBI and specialty injectors are $35 each. Round-trip shipping is $15 flat, 4-injector minimum.
How do I send them in?
Start an order on our Get Started page, ship your injectors to our Weymouth, MA shop, and we return them cleaned, tested, and documented.

Send in your E7120171 injectors

Mail-in cleaning and flow testing with a full before/after report. 4-injector minimum, $15 flat round-trip shipping.

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