Toyota Verso Spark Plugs: Intervals, Fitment & Warning Signs
On the Verso, 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 1654 / Bosch 0 242 129 529
| Petrol engines in this generation | 1.6 (ZGR20) 110 HP; 1.6 (ZGR20) 132 HP; 1.8 (ZGR21) 129 HP; 1.8 (ZGR21) 147 HP |
|---|---|
| Spark plugs (aftermarket) | NGK 1654 (iridium, M12x1.25, hex 14, 5 kOhm); NGK 4912 (iridium, M12x1.25, hex 14); NGK 5989 (iridium, M12x1.25, hex 14); NGK 6283 (iridium, M12x1.25, hex 14); Denso SC16HR11 (iridium, platinum earth, M12x1.25); Denso IXEH20TT and IXEH22TT (iridium TT, M12x1.25); Bosch 0 242 129 529 (gap 1.1 mm, hex 14); Beru Z538 (iridium, gap 1.1 mm) |
| Genuine (OE) numbers quoted | None quoted in catalogue listings — order genuine plugs against your VIN / engine code |
| Fitment notes | All the main plugs are 14 mm hex M12x1.25 iridium types with a 26.5 mm reach, gap about 1.0-1.1 mm; none is tied to the 1.6 (ZGR20) or 1.8 (ZGR21) engine specifically, so confirm by engine code. No copper or laser plugs listed |
A Genuinely Valuable Diagnostic Technique Worth Knowing — Toyota Verso 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 Verso Spark Plugs: A Cheap Part That Causes Expensive-Feeling Problems
On the Toyota Verso, symptoms of worn spark plugs are subtle by nature — a touch rougher at idle, a little less responsive off the line — and easy to attribute to almost any other engine gremlin. Because the part itself is so cheap, it's routinely overlooked well past when it should've been changed.
Toyota Verso Spark Plugs: Watch: Replacing It
Corolla Verso (pre-2009); no video found for the 2009-2018 Verso.
Toyota Verso Spark Plugs: What They Do
How well the Toyota Verso's engine runs, how efficiently it burns fuel, and how smooth it feels are all tied to spark plug condition, since these ignite the compressed fuel-air mixture in each cylinder. That's a petrol-engine job specifically — diesels ignite fuel through compression and have no spark plugs at all.
Toyota Verso 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 Verso 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.