How to replace fuel injectors and reinstall the fuel rail on Mazda 3?

Disconnect the cable from the negative battery terminal. Remove the upper engine cover by pulling it up from each side and lifting it off the mounting posts in the center. Relieve the fuel system pressure. Disconnect the fuel supply line quick-connect fitting from the fuel rail. Disconnect the electrical connectors for all wiring that shares the harness with the fuel injectors, then disconnect the four fuel injector electrical connectors. Remove the fuel rail mounting fasteners, then take out the fuel rail and injectors as an assembly. Use needle-nose pliers to remove each fuel injector retaining clip and take the injector out of its bore in the fuel rail, discarding the upper and lower injector O-rings. It is advisable to replace all O-rings even if only one injector is being replaced. Coat the new upper O-rings with clean engine oil and slide them into place on each injector, then do the same for the lower O-rings. Coat the outside surface of each upper O-ring with clean engine oil and insert each injector into its bore in the fuel rail. Install the injectors and fuel rail assembly on the intake manifold, tightening the fuel rail mounting fasteners securely. The remainder of the installation follows the reverse order of removal. Reconnect the cable to the negative battery terminal. Turn the ignition switch to ON without operating the starter to activate the fuel pump for about two seconds, building up fuel pressure in the lines and rail. Repeat this step two or three times, then check for fuel leaks in the lines, rails, and injectors.

Genuine Mazda 3 Fuel Injector

Gas Injector

Select Vehicle by Model
Select Vehicle by VIN

Select Vehicle by Model

Make

Model

Year

Select Vehicle by VIN

For the most accurate results, select vehicle by your VIN (Vehicle Identification Number).

10 Fuel Injectors found

View related parts
Mazda 3 Injector Part Number: L501-13-250
$66.39 MSRP: $88.53
You Save: $22.14 (26%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Injector, Fuel
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2010-2013 Mazda 3 | S | 4 Cyl 2.5 L GAS
View related parts
Mazda 3 Injector Part Number: PYFA-13-250A
$145.80 MSRP: $194.44
You Save: $48.64 (26%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Fuel Injector; Injector
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2019-2023 Mazda 3 | 2.5 S, Base, Carbon Edition, Preferred, Premium, Select | 4 Cyl 2.5 L GAS
View related parts
Mazda 3 Injector Part Number: PE27-13-250
$152.41 MSRP: $203.25
You Save: $50.84 (26%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Injector, Fuel; Injector
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2021-2022 Mazda 3 | 2.0 | 4 Cyl 2.0 L GAS
View related parts
Mazda 3 Injector Part Number: LF64-13-250
$165.48 MSRP: $220.68
You Save: $55.20 (26%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Injection, Fuel-Multi-Point Electrical
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2004-2005 Mazda 3 | i | 4 Cyl 2.0 L GAS
View related parts
Mazda 3 Injector Part Number: L3G5-13-250
$170.04 MSRP: $226.77
You Save: $56.73 (26%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Injector, Fuel
- Replaces: L3Y2-13-250, L3G2-13-250, L3G2-13-250A
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2006-2013 Mazda 3 | i, Mazdaspeed, S | 4 Cyl 2.0 L GAS, 4 Cyl 2.3 L GAS
View related parts
Mazda 3 Injector Part Number: PE01-13-250D
$198.11 MSRP: $264.20
You Save: $66.09 (26%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Injector, Fuel; Injector
- Replaces: PE01-13-250B, PE01-13-250C
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2012-2018 Mazda 3 | i, i Grand Touring, I Sport, i SV, I Touring, Sport, Touring | 4 Cyl 2.0 L GAS
View related parts
Mazda 3 Injector Part Number: PY01-13-250
$232.49 MSRP: $310.04
You Save: $77.55 (26%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Injector, Fuel
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2021-2023, 2014-2018 Mazda 3 | 2.5 Turbo, 2.5 Turbo Premium Plus, Grand Touring, s Grand Touring, s Touring, Touring | 4 Cyl 2.5 L GAS
View related parts
Mazda 3 Injector Part Number: L3K9-13-250A
$329.10 MSRP: $438.89
You Save: $109.79 (26%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Injection, Fuel-Multi-Point Electrical
- Replaces: L3K9-13-250
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2007-2013 Mazda 3 | Mazdaspeed, S | 4 Cyl 2.3 L GAS
View related parts
Mazda 3 Injector Part Number: LF62-13-250
Product Specifications
- Other Name: Injection, Fuel-Multi-Point Electrical
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2004-2009 Mazda 3 | i, Mazdaspeed, S | 4 Cyl 2.0 L GAS, 4 Cyl 2.3 L GAS
View related parts
Mazda 3 Injector Part Number: L361-13-250
Product Specifications
- Other Name: Injection, Fuel-Multi-Point Electrical
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2004-2005 Mazda 3 | S, SP23 | 4 Cyl 2.3 L GAS

Mazda 3 Fuel Injector

The Mazda 3 Fuel Injector provides accurate fuel under computer control, which gives the small sedan and hatchback great performance and economy. Within every engine cycle, an electronic control module will time the spraying of the injector, the Fuel Injector, in such a way that the vaporized gasoline will enter the cylinder as the piston slides down, giving the optimum air-to-fuel mixture to generate a spark. The injector, or Fuel Injector, cuts down on emissions, improves responsiveness to throttle, and enhances cold starting capability by replacing the old carburetor design. A returnless design, in which the pressure is not regulated on the rail itself but on the pump, is applied in many modern Mazda engines to eliminate unnecessary fuel lines and weight. There are two main styles of injection that have been introduced in Mazda engines, which include indirect multipoint manifold delivery and direct in-cylinder delivery. In indirect systems, air and fuel are mixed directly before the intake valve, whereas in direct systems fuel is injected directly into the combustion chamber to enable higher compression ratios and more precise mixing. Fuel Injectors, despite their relatively long life, may have clogs, electrical problems, or sticking internals that steal power and may endanger engine health should they be left unattended. No matter the style, the mission of the component will never change; it meters and atomizes fuel in half a second so that every Mazda driver will have smooth acceleration and efficient mileage out of their 3. Even with varying throttle demand, altitude, and load, the Fuel Injector is always electronically aligned with throttle demand due to consistent electronic calibration, ensuring the balanced burn characteristic of signature engineering.

Looking for Fuel Injector with proven quality? Choose OEM Fuel Injector. Mazda designs and builds them to strict factory specs. Every piece goes through rigorous quality checks. You'll get parts that fit right and work like new. Shop our huge inventory of OEM Mazda 3 parts. Enjoy the highly competitive prices online. Our site is your one-stop shop. Each genuine 3 part includes a manufacturer's warranty. Buy with confidence. Our return policy is simple and hassle-free. In a rush? Choose expedited delivery at checkout. You'll love the streamlined experience from search to checkout to receiving your order.

Mazda 3 Fuel Injector Parts and Q&A

Injector
L3K9-13-250A
Q: How to replace fuel injectors and reinstall the fuel rail on Mazda 3?
A:
Disconnect the cable from the negative battery terminal. Remove the upper engine cover by pulling it up from each side and lifting it off the mounting posts in the center. Relieve the fuel system pressure. Disconnect the fuel supply line quick-connect fitting from the fuel rail. Disconnect the electrical connectors for all wiring that shares the harness with the fuel injectors, then disconnect the four fuel injector electrical connectors. Remove the fuel rail mounting fasteners, then take out the fuel rail and injectors as an assembly. Use needle-nose pliers to remove each fuel injector retaining clip and take the injector out of its bore in the fuel rail, discarding the upper and lower injector O-rings. It is advisable to replace all O-rings even if only one injector is being replaced. Coat the new upper O-rings with clean engine oil and slide them into place on each injector, then do the same for the lower O-rings. Coat the outside surface of each upper O-ring with clean engine oil and insert each injector into its bore in the fuel rail. Install the injectors and fuel rail assembly on the intake manifold, tightening the fuel rail mounting fasteners securely. The remainder of the installation follows the reverse order of removal. Reconnect the cable to the negative battery terminal. Turn the ignition switch to ON without operating the starter to activate the Fuel Pump for about two seconds, building up fuel pressure in the lines and rail. Repeat this step two or three times, then check for fuel leaks in the lines, rails, and injectors.