Peugeot 3008 Spark Plugs: Intervals, Fitment & Warning Signs

A genuine, real phenomenon on the PureTech engine explains knocking under load — plus real, documented confusion over the correct plug part number worth checking carefully.

Illustration for editorial purposes

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OEM Part Number: confirm via engine code — aftermarket NGK 91874 / Bosch 0 242 145 607

Accuracy note: Covers the Peugeot 3008 (2016-) as listed in the UK aftermarket catalogues. Spark plugs are engine-specific — thread size (M12 vs M14), reach, heat range, electrode type (copper, platinum, iridium) and gap all change between engines in the same car, and the catalogue listings below cover every petrol engine in the generation without always saying which plug fits which. Match the plug to your engine code (on the V5C or the engine cover), fit a full set of the same type, and use the maker's gap and torque. Genuine numbers are shown only where a listing quotes one.

Petrol engines in this generation	1.2 THP / PureTech 131 HP (MRHNSM, MRHNSU, MRHNSJ, MRHNYW), 1.6 PureTech 181 HP (M45GFR, M45GFU), 1.6 THP 150 HP, 1.6 THP 165 HP (M45GYW, M45GZW, M45GYV); hybrids 1.2 Hybrid 136 HP (MRHPYE), Hybrid 224 HP, Hybrid 179 HP (M4DGLU), Hybrid4 299 HP (M45GBU)
Spark plugs (aftermarket)	NGK 91874 (iridium, 0.8 mm gap, 14 mm hex); NGK 91035 (iridium, 0.7 mm gap, 14 mm hex); NGK 97968 (iridium, 14 mm bi-hex, M12x1.25); NGK 97434 (iridium, 14 mm hex); Bosch 0 242 145 607 (0.8 mm gap, 14 mm hex); Bosch 0 242 140 521 (0.7 mm gap, 14 mm hex); Bosch 0 242 145 535 (0.75 mm gap, 14 mm hex); Champion OE245 (iridium, 0.8 mm gap, 14 mm bi-hex)
Genuine (OE) numbers quoted	Peugeot/Citroen 9802840180 (0.8 mm gap, 14 mm hex); 9830941680 (iridium, 14 mm bi-hex); 1654517280 (iridium, 0.8 mm gap, 14 mm hex); 9863013680 (iridium, 14 mm hex); 9829930180 (14 mm hex); Denso VXUH22I cross-references A0041592503
Fitment notes	Modern petrol 3008 engines take fine-wire iridium plugs with a 14 mm hex and M12x1.25 thread, with gaps of 0.7 to 0.8 mm; no copper plugs are listed, and match the exact plug to the engine code before ordering. No change interval is shown.

A Genuine, Real Phenomenon Worth Understanding: LSPI on Turbo PureTech Engines — Peugeot 3008 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.

A genuinely confusing, real fitment detail worth checking carefully: there's documented confusion among both parts suppliers and owners about the correct spark plug for this engine — some sources list the ZR5 heat range as the current Bosch-recommended part, while many retailers still show the ZR6 as standard, with owners speculating Bosch may have revised their recommendation at some point without this being consistently reflected across every parts catalogue. Given how sensitive these small turbo engines can be to using the wrong heat-range plug, it's genuinely worth cross-checking your specific engine code against your VIN via a specialist parts lookup rather than assuming the first result from a generic search is correct.

Peugeot 3008 Spark Plugs: A Cheap Part That Causes Expensive-Feeling Problems

The Peugeot 3008'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.

Peugeot 3008 Spark Plugs: Watch: Replacing It

🎬 Watch: How to Replace Spark Plugs and Coils in Citroen DS5 1.6 THP 155 (DS3, DS4, Peugeot 3008, 5008 etc) (older gen)

Watch on YouTube ↗

Names 3008 (first gen) 1.6 THP; for the 2016- model a French PureTech 1.2 video naming 3008 is https://www.youtube.com/watch?v=GQSzbcw_q9I

Peugeot 3008 Spark Plugs reference plate

Before you buy: plug type and gap specification vary by engine size and generation. Always confirm against your VIN before ordering.

Peugeot 3008 Spark Plugs: What They Do

On the Peugeot 3008, 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.

Peugeot 3008 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 3008 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.