Spark plugs Mazda Mazda 6 GG LF-DE (2.0) — NGK, Bosch, Denso
Spark plugs for Mazda Mazda 6 GG LF-DE (2.0L, 2002–2008) — OEM-spec NGK, Bosch, Denso and Champion part numbers with replacement interval.
Engine Specifications
| Parameter | Value |
|---|---|
| Make / Model | Mazda Mazda 6 GG |
| Engine Code | LF-DE |
| Displacement / Fuel | 2.0L petrol |
| Production Years | 2002–2008 |
| Plug type | iridium |
| Thread | M14x1.25 |
| Reach | 19 mm |
| Hex size | 16 mm |
| Electrode gap | 1.1 mm |
| Heat range | 5 |
Compatible Spark Plugs
| Brand | Part Number | Type |
|---|---|---|
| NGK | NGK LKR6AIX | OE supplier |
| Bosch | Bosch 0242236539 | OE supplier |
| Denso | Denso IKH20TT | OE supplier |
| Champion | Champion OE032/T10 | aftermarket |
Replacement Interval
| Parameter | Value |
|---|---|
| Mileage | 60 000 km |
| Time | 4 years |
Iridium and platinum plugs last 2–3× longer than standard copper plugs. Replace them on schedule — worn plugs increase fuel consumption by 3–5% and reduce power output.
Choosing Spark Plugs for LF-DE
- Use the correct plug type — the LF-DE requires iridium plugs. Upgrading from standard to iridium is acceptable.
- Check the electrode gap — verify the gap is 1.1 mm before installation.
- Torque correctly — for M14x1.25 thread: aluminium head 20–25 Nm, cast iron head 25–30 Nm.
- Replace as a full set — always replace all cylinders at once to ensure even combustion across all cylinders.
FAQ
Which spark plugs fit Mazda Mazda 6 GG LF-DE?
NGK NGK LKR6AIX, Bosch Bosch 0242236539, Denso Denso IKH20TT. All three are OE suppliers and guarantee compatibility with this engine.
How often should spark plugs be replaced on Mazda Mazda 6 GG?
Every 60 000 km or 4 years, whichever comes first. Iridium plugs (NGK LKR6AIX) have a longer service life compared to standard nickel plugs.
Can I fit a different type of spark plug in the LF-DE?
Upgrading to iridium or platinum is acceptable and gives a slight improvement in cold starts. Do not change the heat range (5) — an incorrect heat range can cause pre-ignition or fouling.
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