Toyota RAV4 Spark Plugs: Intervals, Fitment & Warning Signs
On the RAV4, a genuinely valuable diagnostic technique: swapping a coil to a different cylinder reveals whether it's genuinely faulty.
Illustration for editorial purposes
Opens live listings in a new tab.
OEM Part Number: confirm via engine code — aftermarket NGK 6283 / Bosch 0 242 129 529
| Petrol engines in this generation | 2.0 (ZSA42) 143/146 HP; 2.0 4WD (ZSA44) 143/146/151 HP; 2.5 (ASA42) 178/180 HP; 2.5 4WD (ASA44) 178/180 HP; 2.5 Hybrid (AVA42 / AVA44) 197 HP |
|---|---|
| Spark plugs (aftermarket) | NGK 6283 (iridium, M12x1.25, hex 14, 5 kOhm); NGK 4912 (iridium, M12x1.25, hex 14); NGK 96779 (iridium, M14x1.25, hex 16); Denso SC16HR11 (iridium, platinum earth, M12x1.25, alt. IXEH20TT / VCH16); Denso IXEH22TT (iridium TT, M12x1.25); Denso SK16HR11 (iridium, M14x1.25, alt. IKH16TT); Denso IKH16TT (iridium TT, M14x1.25); Bosch 0 242 129 529 (gap 1.1 mm, M12x1.25, hex 14) |
| Genuine (OE) numbers quoted | None quoted in catalogue listings — order genuine plugs against your VIN / engine code |
| Fitment notes | Two families are listed: M12x1.25 14 mm hex iridium plugs (NGK 4912/6283, Denso IXEH20TT/SC16HR11) and M14x1.25 16 mm hex plugs (NGK 96779, Denso SK16HR11/IKH16TT, Champion CET14P platinum, Beru UPT14P); the 2.0 and 2.5 engines are not matched to a family, so confirm by engine code. No copper or laser plugs listed |
A Genuinely Valuable Diagnostic Technique Worth Knowing — Toyota RAV4 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 RAV4 Spark Plugs: A Cheap Part That Causes Expensive-Feeling Problems
The Toyota RAV4's spark plugs rarely fail dramatically; they just quietly degrade, showing up as a rougher idle or slightly blunted acceleration that gets blamed on other things. The part costs next to nothing, which paradoxically makes it one of the most commonly neglected items under the bonnet.
Toyota RAV4 Spark Plugs: Watch: Replacing It
XA40 petrol; 2.5 engine in title.
Toyota RAV4 Spark Plugs: What They Do
On the Toyota RAV4, the compressed fuel-air mixture in each cylinder is ignited by the spark plugs, and their condition feeds directly into combustion efficiency, fuel economy and how smoothly the engine runs. Only petrol engines use them; diesels rely on compression alone.
Toyota RAV4 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 |
Opens live listings in a new tab.
Toyota RAV4 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.