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 Honda Civic L4-1.8LFACTORY OEM SERVICE PROCEDURE
Parts Information
| Part | Manufacturer | OEM Part # | Price | Notes |
| ECM | ||||
| 2 Door | ||||
| Manual Trans | HON | 37820R1AA04 | 385.73 | |
| Auto Trans | ||||
| Federal | HON | 37820R1AA53 | 0.00 | Contact Dealer for most current part and price information. |
| California | HON | 37820R1YL72 | 427.73 | |
| 4 Door | ||||
| Manual Trans | HON | 37820R1AA04 | 385.73 | |
| Auto Trans | ||||
| DX | ||||
| Federal | ||||
| USA Built | HON | 37820R1AA53 | 0.00 | Contact Dealer for most current part and price information. |
| Canada Built | ||||
| CN1, CN2, CN3 | HON | 37820R1AA53 | 0.00 | Contact Dealer for most current part and price information. |
| CN4, CN5 | HON | 37820R1AA51 | 0.00 | |
| California | HON | 37820R1YL72 | 427.73 | |
| EX | ||||
| Federal | ||||
| USA Built | HON | 37820R1AA53 | 0.00 | Contact Dealer for most current part and price information. |
| Canada Built | ||||
| CN1, CN2, CN3 | HON | 37820R1AA53 | 0.00 | Contact Dealer for most current part and price information. |
| CN4 | HON | 37820R1AA51 | 0.00 | |
| Japan Built | HON | 37820R1AA54 | 426.90 | |
| California | ||||
| USA/Canada Built | HON | 37820R1YL72 | 427.73 | |
| Japan Built | HON | 37820R1YL54 | 434.49 | |
| LX | ||||
| Federal | ||||
| USA/Canada Built | HON | 37820R1AA53 | 0.00 | Contact Dealer for most current part and price information. |
| Japan Built | HON | 37820R1AA54 | 426.90 | |
| California | ||||
| USA/Canada Built | HON | 37820R1YL72 | 427.73 | |
| Japan Built | HON | 37820R1YL54 | 434.49 |
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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