Ford Galaxy Spark Plugs: Intervals, Fitment & Warning Signs

A genuine technical warning about engine temperature before removing the Galaxy's plugs, plus why owners often change these ahead of Ford's official schedule.

Illustration for editorial purposes

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OEM Part Number: 1698597 (as quoted in catalogue listings — confirm via engine code) — aftermarket NGK 90607 / Bosch 0 242 230 612

Accuracy note: Covers the Ford Galaxy (2015-) 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	1.5 EcoBoost (160/165 HP), 2.0 EcoBoost (240 HP), 2.5 FHEV (190 HP)
Spark plugs (aftermarket)	NGK 90607 (iridium, 16 mm hex, M14x1.25); NGK 91924 (iridium, 14 mm hex, M12x1.25); NGK 96588 (iridium, 16 mm hex, M14x1.25); Bosch 0 242 230 612 (1.3 mm gap, M14x1.25); Bosch 0 242 236 678 (0.8 mm gap, M14x1.25); Champion CCH9901 (iridium, 1.2 mm gap, M14x1.25); Champion CCH9016 (iridium, 0.8 mm gap, M14x1.25); Champion OE251 (iridium, 0.7 mm gap, M12x1.25)
Genuine (OE) numbers quoted	Denso ITV22 (OE 1698597); Denso K20TT (OE 1WT318110); Ford 1802090 (genuine part)
Fitment notes	EcoBoost petrol engines use iridium plugs in either the 16 mm hex M14x1.25 family (NGK 90607, 96588) or the 14 mm hex M12x1.25 family (NGK 91924, Champion OE251). Brisk 1959 lists a 100,000 km interval. No plug is tied to an engine code.

A Genuine Technical Warning Before You Begin — Ford Galaxy Spark Plugs

Worth knowing before attempting this yourself on the Ford Galaxy: spark plugs should never be removed when the engine is either hot or fully cold-soaked (sat unused overnight) — the engine needs to be warm to the touch after cooling down for a period first. Removing plugs at the wrong temperature risks damaging the thread or the cylinder head itself, a considerably more expensive problem than the plug replacement you started with. On EcoBoost engines specifically, the aluminium cylinder head makes this more of a genuine risk than on some older, simpler engines — over-tightening or working at the wrong temperature can strip threads that are more delicate than cast iron.

On anti-seize compound: opinion is genuinely split even among experienced mechanics. Manufacturers including NGK generally advise against it on modern plugs, which come pre-coated with a corrosion-resistant plating designed to prevent seizing without it — adding anti-seize can alter the effective torque by up to 20%, risking thread damage or a stretched plug shell that changes its heat rating. That said, many long-term owners report using a small amount without issue, particularly on higher-mileage engines where thread corrosion is more of a concern. If in doubt, following the plug manufacturer's specific guidance for your exact plug is the safer default.

It's also worth knowing that Ford's official spark plug interval for the Galaxy (often around 100,000 miles on EcoBoost engines) is considerably longer than what many real-world owners actually do in practice — a meaningful number report changing plugs at 40,000-60,000 miles instead, citing noticeably improved throttle response and fuel economy, particularly on turbocharged engines that work the plugs harder than a naturally-aspirated equivalent. This isn't a hard rule, but if you're noticing a rough idle or slightly longer crank time on an EcoBoost with plugs approaching official end-of-life, fresh plugs are a cheap thing to try before assuming a more expensive fault.

Ford Galaxy Spark Plugs: A Cheap Part That Causes Expensive-Feeling Problems

The Ford Galaxy'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.

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

Ford Galaxy Spark Plugs: Watch: Replacing It

🎬 Watch: spark plugs- Ford 1.5 petrol mondeo - how to replace (gtdi engine) 2016 to 2018 (sister (Mondeo Mk5))

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Galaxy 2015- offered with the same 1.5 EcoBoost; no Galaxy plug video found.

Ford Galaxy Spark Plugs: What They Do

On the Ford Galaxy, 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.

Ford Galaxy 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 standard trims)	4 spark plugs — one per cylinder

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Ford Galaxy 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 Ford Spark Plugs

The same part, covered across other Ford models.