Kia Soul Spark Plugs: Intervals, Fitment & Warning Signs
On the Soul, a documented case on a related model saw a dealer refuse to fix a blocked catalytic converter caused by their own repair, arguing the warranty had lapsed while the car sat in their possession.
Illustration for editorial purposes
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OEM Part Number: confirm via engine code — aftermarket NGK 93815 / Bosch 0 242 135 548
| Petrol engines in this generation | 1.6 MPi 122 HP; 1.6 CVVT 124/129 HP; 1.6 GDI 132 HP; 1.6 T-GDI 204 HP; 2.0 CVVT 150/152/154/158 HP; 2.0 GDI 163/166 HP; plus 1.6 LPG and Flex variants. No engine codes are given. |
|---|---|
| Spark plugs (aftermarket) | NGK 93815 (iridium, 16 mm hex, M12x1.25); NGK 9723 (iridium, M12x1.25); NGK 91450 (nickel, M12x1.25); Bosch 0 242 135 548 (1.0 mm, M12x1.25); Bosch 0 242 129 524 (1.0 mm, M12x1.25); Denso IXUH22FTT (iridium centre, platinum earth, M12x1.25); Denso VXUH22I (iridium, platinum earth, M12x1.25); Champion OE249 (iridium, 0.9 mm, M12x1.25) |
| Genuine (OE) numbers quoted | Denso VXUH22I is quoted against OE A0041592503; Denso XUH22TT against 1WT518110; Denso XU22HDR9 against A1221590003 |
| Fitment notes | Nearly all listed plugs are 16 mm hex M12x1.25 (the Champion OE250 is M14x1.25 and should not be assumed to fit); iridium plugs are the usual fit for the GDI and T-GDI engines and the nickel plugs (NGK 91450, NGK 1643) for older multi-point engines, though the source does not tie plugs to engines; no change interval is given. |
A Genuinely Damning, Real Warranty Story Worth Knowing — Kia Soul Spark Plugs
This is genuinely worth knowing if you're relying on warranty timing to cover a repair: one documented case on a related model saw all of a car's coil packs fail simultaneously, replaced correctly under warranty, but this repair produced a resulting blocked catalytic converter that the dealer then refused to fix — arguing the warranty had since expired, despite the car having remained in the dealer's own possession throughout the entire process.
It's also genuinely worth knowing an honest parts-sourcing frustration on some newer engines: major spark plug manufacturers don't always list a compatible plug for certain specific engine variants, effectively forcing owners toward the genuine Kia part number at a correspondingly higher price.
Kia Soul Spark Plugs: A Cheap Part That Causes Expensive-Feeling Problems
The Kia Soul'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.
Kia Soul Spark Plugs: Watch: Replacing It
2nd-gen Soul 1.6.
Kia Soul Spark Plugs: What They Do
On the Kia Soul, 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.
Kia Soul 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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Kia Soul 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 Kia Spark Plugs
The same part, covered across other Kia models.