The 2012 Nissan Sentra uses four ignition coils—one for each cylinder in its four-cylinder engine.
In more detail, the US‑spec 2012 Sentra is equipped with a 2.0-liter four-cylinder engine (MR20DE) that uses a coil-on-plug ignition system, delivering spark directly to each spark plug. That design results in four independent ignition coils in total, one per cylinder, providing precise ignition timing without a distributor.
Ignition system configuration
Key facts about how the ignition coils are arranged and why it matters:
- Coil-on-plug design means each cylinder has its own ignition coil mounted directly over the spark plug.
- There are four cylinders, so the system uses four coils in total.
- This setup improves spark timing accuracy and reduces maintenance compared to older distributor-based systems.
- Faults in a coil can cause misfires in the corresponding cylinder; diagnostic codes such as P0300–P0304 can indicate misfires.
Concluding: In the typical 2012 Sentra configuration, expect four ignition coils.
Maintenance and troubleshooting tips
Regular inspection of ignition coils, spark plugs, and associated wiring during routine maintenance can prevent mid-trip failures. If you experience symptoms like rough idling, reduced power, or an illuminated check engine light, a diagnostic scan can help identify whether a coil is at fault. Replacing only the faulty coil is common practice; coil packs of multiple coils are not typically used here since each coil is separate.
Regional variations and notes
While the primary configuration in the US-market 2012 Sentra is a four-coil setup for the 2.0-liter engine, some markets with different engine options or generations may vary. Always verify with your vehicle’s VIN or service manual if you have a non-US model or a different engine variant.
Summary
Bottom line: Four ignition coils, one per cylinder, in the standard 2012 Nissan Sentra with the 2.0L MR20DE engine. For troubleshooting, check the individual coils and spark plugs, and seek professional diagnostics if needed.