How to replace fuel injectors and reinstall the fuel rail on 2010 Mazda 3?

Disconnect the negative battery terminal cable. Take off the upper engine cover and de-pressurize the fuel system. Unscrew the fuel line and electrical connectors to the fuel injectors. Take out fuel rail and injectors together. Change all O-rings, grease new ones with engine oil and reassemble. Re-assemble the battery and turn on the fuel pump to look into any leakages.

Genuine 2010 Mazda 3 Fuel Injector

Gas Injector

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3 Fuel Injectors found

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2010 Mazda 3 Injector Part Number: L501-13-250
$66.39 MSRP: $88.53
You Save: $22.14 (26%)
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Product Specifications
- Other Name: Injector, Fuel
- Item Weight: 0.70 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: L501-13-250
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following 2010 Mazda 3 Submodels:
- S | 4 Cyl 2.5 L GAS
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2010 Mazda 3 Injector Part Number: L3G5-13-250
$170.04 MSRP: $226.77
You Save: $56.73 (26%)
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Product Specifications
- Other Name: Injector, Fuel
- Replaces: L3Y2-13-250, L3G2-13-250, L3G2-13-250A
- Item Weight: 0.70 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: L3G5-13-250
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
More Info
Fits the following 2010 Mazda 3 Submodels:
- i, Mazdaspeed, S | 4 Cyl 2.0 L GAS, 4 Cyl 2.3 L GAS
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2010 Mazda 3 Injector Part Number: L3K9-13-250A
$329.10 MSRP: $438.89
You Save: $109.79 (26%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Injection, Fuel-Multi-Point Electrical
- Replaces: L3K9-13-250
- Item Weight: 1.60 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: L3K9-13-250A
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
More Info
Fits the following 2010 Mazda 3 Submodels:
- Mazdaspeed, S | 4 Cyl 2.3 L GAS

2010 Mazda 3 Fuel Injector Parts and Q&A

Q: How to replace fuel injectors and reinstall the fuel rail on 2010 Mazda 3?
A: Disconnect the negative battery terminal cable. Take off the upper engine cover and de-pressurize the fuel system. Unscrew the fuel line and electrical connectors to the fuel injectors. Take out fuel rail and injectors together. Change all O-rings, grease new ones with engine oil and reassemble. Re-assemble the battery and turn on the fuel pump to look into any leakages.