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 Rail

Engine Fuel Rail

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 Rails found

View related parts
Mazda 3 Fuel Rail Part Number: L3K9-13-150E
$790.15 MSRP: $1079.64
You Save: $289.49 (27%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Distributor, Fuel
- Replaces: L3K9-13-150D, L3K9-13-150, L3K9-13-150B, L3K9-13-150A, L3K9-13-150C
- 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 Fuel Rail Part Number: L506-13-150
$165.81 MSRP: $221.13
You Save: $55.32 (26%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Distributor, Fuel
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2012-2013 Mazda 3 | S | 4 Cyl 2.5 L GAS
View related parts
Mazda 3 Fuel Rail Part Number: PE27-13-15Z
$182.10 MSRP: $242.85
You Save: $60.75 (26%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Distributor, Fuel; Fuel Rail
- 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 Fuel Rail Part Number: PYFA-13-15Z
$182.10 MSRP: $242.85
You Save: $60.75 (26%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Distributor, Fuel; Fuel Rail
- 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 Fuel Rail Part Number: PE01-13-150
$185.75 MSRP: $247.72
You Save: $61.97 (26%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Distributor, Fuel
- Replaces: PE22-13-150
- 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 Fuel Rail Part Number: PY8V-13-150
$236.46 MSRP: $315.35
You Save: $78.89 (26%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Distributor, Fuel
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2021-2023 Mazda 3 | 2.5 Turbo, 2.5 Turbo Premium Plus | 4 Cyl 2.5 L GAS
View related parts
Mazda 3 Fuel Rail Part Number: PY01-13-150A
$284.85 MSRP: $379.87
You Save: $95.02 (26%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Distributor, Fuel
- Replaces: PY01-13-150
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2014-2018 Mazda 3 | Grand Touring, s Grand Touring, s Touring, Touring | 4 Cyl 2.5 L GAS
View related parts
Mazda 3 Fuel Rail Part Number: L3G3-13-150
Product Specifications
- Other Name: Distributor, Fuel
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2004-2009 Mazda 3 | i, Mazdaspeed, S, SP23 | 4 Cyl 2.0 L GAS, 4 Cyl 2.3 L GAS
View related parts
Mazda 3 Fuel Rail Part Number: L5061315XB
Product Specifications
- Other Name: Distributor, Fuel
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2010-2011 Mazda 3 | S | 4 Cyl 2.5 L GAS
View related parts
Mazda 3 Fuel Rail Part Number: LF4J-13-15XB
Product Specifications
- Other Name: Distributor, Fuel
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2010-2013 Mazda 3 | i | 4 Cyl 2.0 L GAS

Mazda 3 Fuel Rail

The pressure pathway is made up of a Mazda 3 Fuel Rail that supplies each injector with the precise quantity of gasoline required to power cleanly and produce low emissions. In the simple injection system described, throttle body injection is mounted above the intake in the location of an ancient carburetor, and has injectors and a regulator of its own, thus does not require a separate rail. Mazda 3 models which transitioned to multiport systems took a dedicated Fuel Rail which is attached to the intake runners, where constant fuel pressure and a regulator permit the powertrain computer to adjust injector pulse width, shortening the spray at idle and lengthening it under load. Subsequently, the common rail idea and gasoline direct injection use pressure that is more than 2,000 bar, allowing finer droplets to pass directly into the combustion chamber. This high-pressure Fuel Rail enhances vaporization and combines fuel with air in a much better manner that improves performance with a consumption cut. At these phases Mazda's objective remains the same, namely to provide fuel in the correct and reliable manner for all phases, but the arrangement will change from low pressure integrated units to separated rails applied in port injection and lastly incredibly strong steel rails constructed to inject directly. Depending on the version that is found on a particular Mazda 3, a replacement cost can range, and the appropriate fit must reflect the engine generation. The drivers will thus experience the highly improved rail to date with its high efficiency and powerfulness.

Looking for Fuel Rail with proven quality? Choose OEM Fuel Rail. 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 Rail Parts and Q&A

Fuel Rail
LF4J-13-15XB
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.