Hyundai ix35 Spark Plugs: Intervals, Fitment & Warning Signs
On the ix35, a documented case on a related model saw ceramic plug cracking and coil failures recur four separate times on the same car.
Illustration for editorial purposes
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OEM Part Number: confirm via engine code — aftermarket NGK 1640 / Bosch 0 242 236 577
| Petrol engines in this generation | 1.6 (135 HP), 2.0 CVVT (150 HP), 2.4 GDi (185 HP) |
|---|---|
| Spark plugs (aftermarket) | NGK 1640 (iridium, 16 mm hex, M14x1.25, 60,000 km interval); NGK 93815 (iridium, M12x1.25); NGK 9723 (iridium, M12x1.25); NGK 4469 (iridium, M14x1.25); Bosch 0 242 236 577 (0.7 mm gap, M14x1.25); Bosch 0 242 135 548 (1.0 mm gap, M12x1.25); Denso IXUH22FTT (iridium centre, platinum earth, M12x1.25); Denso K16HPR-U11 (nickel, M14x1.25) |
| Genuine (OE) numbers quoted | Denso K16HPR-U11 (OE 5960F3) |
| Fitment notes | Both M12x1.25 and M14x1.25 plugs are listed, which suggests different engines in the range take different threads; check the exact engine before ordering. Iridium is the main choice (NGK 1640, Champion CCH9006), with copper and nickel alternatives. Febi bilstein 13432 lists a 30,000 km interval. |
A Genuinely Distinctive, Real Case Worth Knowing About — Hyundai ix35 Spark Plugs
This is genuinely worth knowing if you're facing a recurring plug or coil fault that seems to keep coming back: one documented case on a related model saw ceramic spark plugs cracking and causing misfires, alongside ignition coil failures, recur four separate times on the same car, with each instance replaced under warranty only for the fault to return.
It's also worth knowing a genuinely useful distinction: unlike spark plugs, which are a genuine, expected consumable, ignition coils are not considered a standard wear-and-tear part — worth pushing back if a dealer tries to dismiss a coil failure as simply expected wear.
Hyundai ix35 Spark Plugs: A Cheap Part That Causes Expensive-Feeling Problems
On the Hyundai ix35, spark plug wear tends to creep in quietly — idle gets a little rougher, throttle response softens slightly — the kind of symptoms that get blamed on almost anything else under the bonnet. Given how cheap the part itself is, it's an easy one to put off for longer than makes sense.
Hyundai ix35 Spark Plugs: Watch: Replacing It
ix35 1.6 GDI.
Hyundai ix35 Spark Plugs: What They Do
Inside each cylinder of the Hyundai ix35, spark plugs ignite the compressed fuel-air mixture, and their condition has a direct effect on combustion efficiency, fuel economy and how smoothly the engine runs. Petrol engines can't function without them; diesels don't use spark plugs, relying on compression alone to ignite fuel.
Hyundai ix35 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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Hyundai ix35 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 Hyundai Spark Plugs
The same part, covered across other Hyundai models.