Kia Rio Spark Plugs: Intervals, Fitment & Warning Signs
On the Rio, 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: 18843-08062 (as quoted in catalogue listings — confirm via engine code) — aftermarket NGK 93102 / Bosch 0 242 135 554
| Petrol engines in this generation | 1.0 T-GDI 101/120 HP (and Eco-Dynamics+ mild hybrid); 1.2 CVVT 84 HP; 1.25 84 HP; 1.4 99/101 HP; 1.6 121/123/130 HP; plus 1.25 LPG and 1.6 Flex variants. No engine codes are given. |
|---|---|
| Spark plugs (aftermarket) | NGK 93102 (iridium, 0.8 mm, 16 mm hex, M12x1.25); NGK 97098 (iridium, M12x1.25); NGK 1578 (nickel, M12x1.25); Bosch 0 242 135 554 (1.1 mm, M12x1.25); Bosch 0 242 145 510 (0.7 mm, M12x1.25); Denso IXUH22FTT (iridium centre, platinum earth, M12x1.25); Denso ZXU20HPR11 (iridium, platinum earth, M12x1.25); Champion CCH9023 (iridium, 1.0 mm, M12x1.25) |
| Genuine (OE) numbers quoted | Denso XUH20TTi is quoted against OE 18843-08062 and 18843-10; Denso ZXU20HPR11 against 09482-00629 |
| Fitment notes | Almost every plug is 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 direct-injection 1.0 T-GDI and the newer 1.25 and 1.4 engines, with nickel or copper plugs (NGK 1578, Champion OE201/T10) for older multi-point units, though the source does not tie plugs to engines; no change interval is given. |
A Genuinely Damning, Real Warranty Story Worth Knowing — Kia Rio 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 Rio Spark Plugs: A Cheap Part That Causes Expensive-Feeling Problems
Worn spark plugs on the Kia Rio rarely announce themselves clearly — a slightly rougher idle, a bit less punch off the line — symptoms easy to blame on almost anything else in the engine bay. The part itself costs very little, which makes it an easy one to overlook for far longer than it should be.
Kia Rio Spark Plugs: Watch: Replacing It
2018 Rio; alt dIq1DTIIvU4 (2012-2018).
Kia Rio Spark Plugs: What They Do
The Kia Rio's spark plugs ignite the compressed fuel-air mixture inside each cylinder, and their condition directly affects combustion efficiency, fuel economy and smooth running. Petrol engines rely entirely on them; diesel engines don't use spark plugs at all, relying on compression instead.
Kia Rio Spark Plugs: Generations, Engines & Spark Plug Count
| Diesel variants | Not applicable — diesel engines use compression ignition and have no spark plugs at all |
|---|---|
| 1.0 T-GDi (standard petrol trims, current generation) | Genuinely only 3 spark plugs — confirm your exact engine before assuming 4 |
| 1.25/1.4/1.6 (older generations) | 4 spark plugs — a conventional four-cylinder engine |
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Kia Rio 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.