Toyota C-HR Spark Plugs: Intervals, Fitment & Warning Signs
On the C-HR, a genuinely valuable diagnostic technique: swapping a coil to a different cylinder reveals whether it's genuinely faulty.
Illustration for editorial purposes
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OEM Part Number: confirm via engine code — aftermarket NGK 96210 / Bosch 0 242 140 565
| Petrol engines in this generation | 1.2 (NGX10) 116 HP; 1.2 4WD (NGX50) 131 HP and 116 HP; 1.8 (ZGX11) 140 HP; 2.0 (ZGX10) 144, 148 and 150 HP. Hybrids: 1.8 Hybrid (ZYX10, ZYX11) 122 HP; 2.0 Hybrid (MAXH10) 184 HP |
|---|---|
| Spark plugs (aftermarket) | NGK 96210 (iridium, gap 0.8 mm, M12x1.25, hex 14, 5 kOhm suppression); NGK 5989 (iridium, M12x1.25, hex 14); NGK 95029 (iridium, gap 0.9 mm, M12x1.25, hex 14); Bosch 0 242 140 565 (gap 0.7 mm, M12x1.25, hex 14); Bosch 0 242 140 572 (gap 0.65 mm, hex 14); Denso FC16HR-Q8 (iridium centre, platinum earth); Denso EC22HPR-D7 (iridium, platinum earth); Beru Z543 (iridium, gap 0.8 mm, M12x1.25, hex 14) |
| Genuine (OE) numbers quoted | Denso FC16HR-Q8 = 90919-01289 (alt. IXEH20TT); Denso EC22HPR-D7 = 90919-01295 (alt. IXEH24FTT); Kamoka 7100010 quotes 1611548180 |
| Fitment notes | All plugs listed are iridium M12x1.25 with 14 mm hex; the engine-specific split is not stated for individual plugs, so confirm by engine code (Denso FC16HR-Q8 and EC22HPR-D7 are the Toyota OE references). No copper or laser plugs listed |
A Genuinely Valuable Diagnostic Technique Worth Knowing — Toyota C-HR Spark Plugs
If you're getting a persistent misfire fault code pointing to a specific cylinder and want to confirm whether the coil itself is genuinely at fault, this is worth trying: physically swap the coil from the suspect cylinder with a coil from a different cylinder position, then clear the codes and drive again. If the fault code now follows the coil to its new position, the coil itself is genuinely faulty. If the fault code stays with the original cylinder position, the coil isn't the problem.
It's also worth knowing about a genuinely real, somewhat distinctive pattern: an intermittent misfire that seems to worsen specifically in wet weather, and settles down after sitting in a dry garage overnight, often points toward moisture affecting a connector rather than a genuine fault with the coil or plug itself.
Toyota C-HR Spark Plugs: A Cheap Part That Causes Expensive-Feeling Problems
A worn set of spark plugs in the Toyota C-HR doesn't make itself obvious: idle roughens slightly, acceleration loses a bit of urgency, and both symptoms are easy to blame on something else entirely. Given how inexpensive the part is, it often gets neglected for far longer than it should.
Toyota C-HR Spark Plugs: Watch: Replacing It
Straight plug change on a 2018 C-HR.
Toyota C-HR Spark Plugs: What They Do
Every combustion cycle in the Toyota C-HR's petrol engine starts with a spark plug igniting the compressed fuel-air mixture, and their condition shapes efficiency, economy and smoothness directly. Diesel versions don't need them at all, relying purely on compression to ignite fuel.
Toyota C-HR Spark Plugs: Generations & Spark Plug Count
| Diesel variants | Not applicable — diesel engines use compression ignition and have no spark plugs at all |
|---|---|
| Petrol variants (all trims) | 4 spark plugs — one per cylinder |
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Toyota C-HR Spark Plugs: Warning Signs, DIY Difficulty & Aftermarket Advice
These are the same regardless of make or model — see our full Spark Plugs Guide for symptoms of worn plugs, why matching your exact plug specification matters, and trusted brands to buy from.
More Toyota Spark Plugs
The same part, covered across other Toyota models.