Dacia Logan MCV Spark Plugs: Intervals, Fitment & Warning Signs
On the Logan MCV, a genuine fitment trap: NGK replacement coils are rated 14V versus the original 12V units.
Illustration for editorial purposes
Opens live listings in a new tab.
OEM Part Number: confirm via engine code — aftermarket NGK 6418 / Bosch 0 242 135 517
| Petrol engines in this generation | 1.0 SCe 73 HP, 1.0 TCe 101 HP, 1.2 73/75 HP, 1.6 84 HP, TCe 90 HP (K8M1); LPG variants also listed |
|---|---|
| Spark plugs (aftermarket) | NGK 6418 (iridium, M14x1.25, 16 mm); NGK 91121 (iridium, M12x1.25, 14 mm); NGK 90061 (iridium, 14 mm); NGK 4388 (nickel, 16 mm); Bosch 0 242 135 517 (gap 0.7 mm, 14 mm, 23 Nm); Denso IXEH20TT (iridium, platinum earth, M12x1.25); Denso K20TT (nickel, M14x1.25, 16 mm); Denso XE20HR-U9 (nickel, 14 mm) |
| Genuine (OE) numbers quoted | Denso XE20HR-U9 = 8200662185; Denso K20TXR = 7700500168; Denso K20TT = 1WT318110 |
| Fitment notes | Two families appear: 14 mm M12x1.25 (TCe and newer engines) and 16 mm M14x1.25 (older 1.2 and 1.6 engines), with iridium and copper or nickel options in each. NGK 1496 (laser LPG) has a 60,000 km interval. Plugs are not mapped to engines. |
A Genuine Fitment Trap Worth Knowing Before Ordering Replacement Coils — Dacia Logan MCV Spark Plugs
If you're replacing ignition coils and considering NGK as an alternative to the original fitment, this is genuinely worth knowing: one documented case found NGK replacement coils specified as 14V, while the original factory-fitted Hitachi units were rated at 12V — a genuine voltage mismatch that may explain compatibility issues some owners have experienced when mixing brands.
It's also worth knowing why 3-cylinder engines often have a shorter plug replacement interval than you might expect on a low-mileage car: with fewer cylinders sharing the workload, each spark plug fires more frequently per crankshaft revolution, accelerating wear even at modest annual mileage.
Dacia Logan MCV Spark Plugs: A Cheap Part That Causes Expensive-Feeling Problems
A worn set of spark plugs in the Dacia Logan MCV 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.
Dacia Logan MCV Spark Plugs: Watch: Replacing It
Logan 0.9 TCe, the petrol turbo used in the 2013-2020 MCV
Dacia Logan MCV Spark Plugs: What They Do
Every combustion cycle in the Dacia Logan MCV'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.
Dacia Logan MCV Spark Plugs: Generations, Engines & Spark Plug Count
| Diesel variants (dCi) | Not applicable — diesel engines use compression ignition and have no spark plugs at all |
|---|---|
| 0.9/1.0 TCe/SCe (standard petrol trims) | Genuinely only 3 spark plugs — this small turbocharged engine (co-developed with Nissan) is shared across Renault, Dacia and even some Smart models, not a four-cylinder |
| 1.3 TCe (higher trims, RS Line and similar) | Genuinely 4 spark plugs — this larger engine (co-developed with Mercedes-Benz) is a completely different unit from the smaller 3-cylinder TCe, despite both sharing the "TCe" badge; confirm your exact engine before ordering |
Opens live listings in a new tab.
Dacia Logan MCV 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 Dacia Spark Plugs
The same part, covered across other Dacia models.