Spark plugs BMW 3 Series F30 B48B20 (2.0) — NGK, Bosch, Denso
Spark plugs for BMW 3 Series F30 B48B20 (2.0L, 2015–2019) — OEM-spec NGK, Bosch, Denso and Champion part numbers with replacement interval.
Engine Specifications
| Parameter | Value |
|---|---|
| Make / Model | BMW 3 Series F30 |
| Engine Code | B48B20 |
| Displacement / Fuel | 2.0L petrol |
| Production Years | 2015–2019 |
| Plug type | iridium |
| Thread | M12x1.25 |
| Reach | 26.5 mm |
| Hex size | 16 mm |
| Electrode gap | 0.7 mm |
| Heat range | 8 |
Compatible Spark Plugs
| Brand | Part Number | Type |
|---|---|---|
| NGK | ILZFR6D11 | OE supplier |
| Bosch | 0 242 236 573 | OE supplier |
| Denso | IWF20 | OE supplier |
| Champion | 9003 | 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 B48B20
- Use the correct plug type — the B48B20 requires iridium plugs. Upgrading from standard to iridium is acceptable.
- Check the electrode gap — verify the gap is 0.7 mm before installation.
- Torque correctly — for M12x1.25 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 BMW 3 Series F30 B48B20?
NGK ILZFR6D11, Bosch 0 242 236 573, Denso IWF20. All three are OE suppliers and guarantee compatibility with this engine.
How often should spark plugs be replaced on BMW 3 Series F30?
Every 60 000 km or 4 years, whichever comes first. Iridium plugs (ILZFR6D11) have a longer service life compared to standard nickel plugs.
Can I fit a different type of spark plug in the B48B20?
Upgrading to iridium or platinum is acceptable and gives a slight improvement in cold starts. Do not change the heat range (8) — an incorrect heat range can cause pre-ignition or fouling.
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