Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2012 Mazda 3 L4-2.5LFACTORY OEM SERVICE PROCEDURE
Parts Information
| Part | Manufacturer | OEM Part # | Price | Notes |
| ECM | ||||
| Manual Trans | ||||
| Federal | ||||
| To 7/23/12 | MZD | L5F718881A | 695.69 | |
| From 7/23/12 | MZD | L5J218881 | 677.89 | |
| California | ||||
| To 3/1/12 | MZD | L5F918881A | 695.69 | |
| From 3/1/12 To 7/23/12 | MZD | L5H718881 | 0.00 | |
| From 7/23/12 | MZD | L5J418881 | 700.91 | |
| Auto Trans | ||||
| Federal | MZD | L5J318881 | 695.69 | |
| California | ||||
| To 3/1/12 | MZD | L5G118881A | 706.19 | |
| From 3/1/12 To 7/23/12 | MZD | L5H818881 | 0.00 | |
| From 7/23/12 | MZD | L5J518881 | 700.91 |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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