Peugeot 2008 Spark Plugs: Intervals, Fitment & Warning Signs
On the 2008, a genuine, real phenomenon on the 1.2 PureTech engine explains knocking under load — plus real, documented plug part number confusion worth checking.
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OEM Part Number: confirm via engine code — aftermarket NGK 91874 / Bosch 0 242 140 543
| Petrol engines in this generation | 1.2 PureTech/VTi 82 HP; 1.2 THP/PureTech 110 HP and 130 HP; 1.6 VTi 116/120 HP; 1.6 THP 165 HP; 1.6 Flex 118/122 HP; 1.6 Griffe Flex 173 HP |
|---|---|
| Spark plugs (aftermarket) | NGK 91874 (iridium, gap 0.8 mm, M12x1.25, 14 mm hex); NGK 97968 (iridium, M12x1.25, 14 mm Bi-Hex); NGK 91530 (platinum, M12x1.25, 14 mm Bi-Hex); NGK 97999 (iridium, M12x1.25, 16 mm hex); Bosch 0 242 140 543 (gap 0.75 mm, M12x1.25, 14 mm hex); Bosch 0 242 135 518 (gap 0.7 mm, M12x1.25, 14 mm hex); Denso VXUH22I (iridium centre, platinum earth, M12x1.25) |
| Genuine (OE) numbers quoted | Denso VXUH22I is quoted against A0041592503 |
| Fitment notes | The 1.2 three-cylinder PureTech and the 1.6 VTi/THP engines draw on the same M12x1.25 family, mostly iridium at a 0.7-0.8 mm gap with platinum Champion OE205 and CET16P as alternatives; Bosch 0 242 229 797 is the only M14 item. no change interval is shown. |
A Genuine, Real Phenomenon Worth Understanding: LSPI on Turbo PureTech Engines — Peugeot 2008 Spark Plugs
If your car has a PureTech turbocharged petrol engine and you're experiencing a knocking or misfiring sensation specifically under load at low engine speed, it's worth knowing about Low Speed Pre-Ignition (LSPI) — a genuine, industry-recognised phenomenon affecting small, turbocharged direct-injection engines generally, not something unique to Peugeot. It occurs when the fuel-air mixture ignites prematurely, before the spark plug fires, causing a knock that can potentially damage the engine over time if it happens repeatedly. Genuinely useful to know: LSPI is understood to be exacerbated by certain oil additive packages, and switching to an oil that meets the correct, current specification for this engine — combined with using a higher-octane fuel, which some owners report noticeably reduces the frequency of the knock — are the cheapest, simplest first steps worth trying.
Peugeot 2008 Spark Plugs: A Cheap Part That Causes Expensive-Feeling Problems
A worn set of spark plugs in the Peugeot 2008 doesn't make itself obvious: idle roughens slightly, acceleration loses a bit of urgency, and both symptoms are easy to blame on something else entirely. Given how inexpensive the part is, it often gets neglected for far longer than it should.
Peugeot 2008 Spark Plugs: Watch: Replacing It
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Peugeot 2008 Spark Plugs: What They Do
Every combustion cycle in the Peugeot 2008's petrol engine starts with a spark plug igniting the compressed fuel-air mixture, and their condition shapes efficiency, economy and smoothness directly. Diesel versions don't need them at all, relying purely on compression to ignite fuel.
Peugeot 2008 Spark Plugs: Generations, Engines & Spark Plug Count
| Diesel variants (BlueHDi) | Not applicable — diesel engines use compression ignition and have no spark plugs at all |
|---|---|
| 1.2 PureTech/THP (standard petrol trims) | Genuinely only 3 spark plugs — this engine is shared across the wider PSA/Stellantis range (Peugeot, Citroen, DS), not a four-cylinder |
| GTI/GT (1.6 THP, where fitted) | 4 spark plugs — the performance derivative uses a genuinely different, larger four-cylinder engine from the standard car's 3-cylinder unit |
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Peugeot 2008 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 Peugeot Spark Plugs
The same part, covered across other Peugeot models.