Spark plugs Subaru Impreza GD EJ20 (2.0) — NGK, Bosch, Denso
Spark plugs for Subaru Impreza GD EJ20 (2.0L, 2000–2007) — OEM-spec NGK, Bosch, Denso and Champion part numbers with replacement interval.
Engine Specifications
| Parameter | Value |
|---|---|
| Make / Model | Subaru Impreza GD |
| Engine Code | EJ20 |
| Displacement / Fuel | 2.0L petrol |
| Production Years | 2000–2007 |
| Plug type | iridium |
| Thread | M14x1.25 |
| Reach | 19 mm |
| Hex size | 16 mm |
| Electrode gap | 0.8 mm |
| Heat range | 6 |
Compatible Spark Plugs
| Brand | Part Number | Type |
|---|---|---|
| NGK | NGK BKR6EIX | OE supplier |
| Bosch | Bosch 0242229656 | OE supplier |
| Denso | Denso IK20TT | OE supplier |
| Champion | Champion OE022/T10 | aftermarket |
Replacement Interval
| Parameter | Value |
|---|---|
| Mileage | 30 000 km |
| Time | 2 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 EJ20
- Use the correct plug type — the EJ20 requires iridium plugs. Upgrading from standard to iridium is acceptable.
- Check the electrode gap — verify the gap is 0.8 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 Subaru Impreza GD EJ20?
NGK NGK BKR6EIX, Bosch Bosch 0242229656, Denso Denso IK20TT. All three are OE suppliers and guarantee compatibility with this engine.
How often should spark plugs be replaced on Subaru Impreza GD?
Every 30 000 km or 2 years, whichever comes first. Iridium plugs (NGK BKR6EIX) have a longer service life compared to standard nickel plugs.
Can I fit a different type of spark plug in the EJ20?
Upgrading to iridium or platinum is acceptable and gives a slight improvement in cold starts. Do not change the heat range (6) — an incorrect heat range can cause pre-ignition or fouling.
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