Yes. On the 2016 Honda Fit with the 1.5L engine, spark plugs are accessed via coil-on-plug assemblies on the cylinder head, and you can change them at home with common tools. The typical replacement interval is around 105,000 miles under normal driving; use OEM iridium plugs or equivalent, and follow the procedure below for proper torque and seating.
Tools and supplies
The following tools and parts will help you perform a clean, reliable plug change without damaging the engine.
- 4 new iridium or factory-recommended spark plugs (correct heat range for the 1.5L engine)
- Spark plug socket (usually 5/8 inch / 16 mm) with a 3–6 inch extension
- Ratchet wrench and, if needed, a short-adapter/ratchet extension
- Torque wrench capable of delivering the manufacturer's spec
- Dielectric grease for coil boots (optional but helpful)
- Flat-head or Phillips screwdriver (for loosening hoses or ducts if required)
- Compressed air or a clean shop rag to clear debris around spark plug holes
- Anti-seize compound (optional; many OEM plugs come pre-sealed and do not require anti-seize)
- Gloves and safety glasses
Having the right tools and parts on hand helps ensure the plugs install cleanly and reduce the risk of cross-threading or damaged coil boots.
Safety and preparation
Prepare the vehicle and workspace to minimize risk and damage during the procedure.
- Park on a level surface and engage the parking brake.
- Allow the engine to cool completely before starting to prevent burns.
- Disconnect the negative terminal of the battery to prevent accidental electrical shorts.
- If your engine has a plastic engine cover, remove it to access the coils and plugs; remove any air intake ducts or hoses blocking access if needed.
- Keep debris away from the spark plug wells; a quick blast of compressed air is helpful before removing coils.
With safety steps in place, you’re ready to access the ignition coils and spark plugs.
Step-by-step replacement procedure
Below is the typical sequence for replacing the spark plugs on a 2016 Honda Fit. Follow each step carefully to avoid damaging the threads or coil boots.
- Ensure the engine is cool, then remove the engine cover if equipped.
- Identify the four ignition coils sitting on top of each spark plug. Each coil is connected to a wiring harness.
- Detach the electrical connector from each ignition coil. Use a small flat-blade screwdriver if the clip is stubborn, and gently pry the connector free.
- Remove the mounting bolt(s) or retaining hardware for each coil (common on this engine is a single small bolt or snap-fit). Carefully lift the coil straight up to expose the spark plug.
- Clear the spark plug well around the hole with compressed air or a clean rag to prevent debris from falling into the cylinder.
- Install the new spark plug by hand, turning clockwise until the threads engage smoothly. Do not force the plug if you feel resistance; back out and start again to avoid cross-threading.
- Once hand-tight, tighten the spark plug to the OEM specification using a torque wrench. For most 1.5L Honda plugs, the target is typically in the low-to-mid range (often around 18–22 N·m or 13–16 ft-lbs). Always consult the owner’s manual or service manual for the exact spec for your plug type.
- Reinstall the coil onto the plug. Reinsert and tighten the coil mounting bolt (if applicable), and reconnect the electrical connector securely. Repeat for the remaining cylinders.
- When all plugs and coils are reinstalled, reattach any ducts or covers you removed. Reconnect the negative battery terminal if it was disconnected.
- Start the engine and listen for a smooth idle. Look for misfires or rough running. If the engine runs poorly after a plug change, recheck the plug seating and electrical connections.
With the plugs installed and everything reassembled, you’ve completed the replacement. A careful recheck of all connections helps prevent post-service issues.
Post-install tips and notes
After finishing the replacement, consider these tips to ensure lasting performance and reliable ignition:
- Use plugs that match the OEM specification and heat range recommended for the 1.5L engine.
- Most OEM plugs come pre-gapped; verify the gap with a feeler gauge if you’re using non-OEM plugs.
- A small amount of dielectric grease on the inside of coil boots can help prevent moisture intrusion and ease future disassembly.
- Keep the ignition coil boots clean and free of oil or coolant residues; oil contamination can lead to misfires.
Following these practices helps ensure the new plugs perform as intended and reduces the likelihood of future ignition issues.
Maintenance notes and plug selection
Choosing the right spark plugs
For the 2016 Honda Fit, use iridium or platinum plugs that match Honda’s recommended heat range and reach. Many owners opt for OEM-equivalent plugs from NGK or Denso. If you’re unsure, ask a parts specialist for the exact OEM plug number for your trim and VIN.
When to service again
Honda generally recommends replacing spark plugs around 105,000 miles (169,000 km) under normal driving conditions. If you drive under severe conditions—short trips, heavy traffic, or frequent towing—the interval may be sooner. Always verify with your owner’s manual or your dealership’s service schedule.
Summary
Changing the spark plugs on a 2016 Honda Fit is a manageable DIY task that preserves engine efficiency and fuel economy. Access the coils on top of the cylinder head, replace each plug with the correct type, torque them to spec, and reassemble carefully. Use the right tools, verify gap if needed, and adhere to the manufacturer’s replacement interval for optimal performance.