Parts for your 2020 Toyota C-hr-Ignition coils

2020 Toyota C-HR ignition coils — purpose, care and replacement

Ignition coils are absolutely relevant to the 2020 Toyota C-HR. Technical sources such as the Toyota C-HR Repair Manual (via Toyota TIS), Toyota Electronic Parts Catalogue, and Denso ignition system documentation identify a coil-on-plug setup across petrol and hybrid variants. Whether fitted with the 2.0L M20A-FKS, the 1.8L hybrid 2ZR-FXE, or the 1.2L turbo 8NR-FTS used in some markets, the C-HR runs one ignition coil per cylinder.

The ignition coil’s job is to step up battery voltage to a high-voltage spark that fires the spark plug at precisely the right moment. With coil-on-plug design, each cylinder gets its own compact coil for cleaner combustion, better efficiency, and tighter control of timing—ideal for the C-HR’s mix of city duties and open-road cruising across Australia and New Zealand.

As a service item, ignition coils generally aren’t scheduled for routine replacement. However, they should be inspected whenever spark plugs are serviced (typically around 120,000 km—check the owner’s handbook for the exact interval). A technician will check the coil boots for carbon tracking, cracking, or moisture, and make sure connectors are clean and secure.

• Common signs a coil is failing include: rough idle, hesitation under load, higher fuel use, hard starting, or the check engine light on with misfire codes (e.g., P0300–P0304) or coil circuit codes (P0351–P0354).

Replacement is straightforward when completed by a competent technician using quality parts (Toyota/Denso are the usual OE fit). It’s smart to replace the spark plugs at the same time if they’re due, and to fix any oil in the plug wells (often a cam cover gasket) that can damage new coils.

1. Allow the engine to cool and remove the engine cover.
2. Unclip the coil connectors, remove the 10 mm retaining bolts, and pull the coils straight up.
3. Inspect boots and plug wells, clean and dry as needed.
4. Lightly apply dielectric grease to the inside of the boot, refit coils, and tighten to the repair manual torque spec.
5. Refit connectors and engine cover, clear any codes and road test.

Keeping the intake area clean, using the correct iridium plugs, and avoiding over-torque on coils and plugs all help the C-HR’s ignition system stay reliable for the long haul.

How many ignition coils does a 2020 Toyota C-HR have?
The C-HR uses a coil-on-plug setup with one coil per cylinder. All 2020 models are four-cylinder, so there are four ignition coils. This applies to petrol and hybrid variants alike.

Should all coils be replaced at once?
If one coil fails, it’s fine to replace just that coil after confirming the fault. If multiple coils show age-related issues or misfires are creeping across cylinders, replacing the full set with new OE-quality coils can save repeat visits.

How long do C-HR ignition coils last?
It’s common for coils to last well beyond 150,000 km when plugs are serviced on time and plug wells stay dry. Heat, oil intrusion, and overdue spark plugs are the big coil killers, so timely maintenance really pays off.