Spark plugs BMW 3 Series G20 B48B20 (2.0T) — NGK, Bosch, Denso
Spark plugs for BMW 3 Series G20 B48B20 (2.0TL, 2018–2023) — OEM-spec NGK, Bosch, Denso and Champion part numbers with replacement interval.
Engine Specifications
| Parameter | Value |
|---|---|
| Make / Model | BMW 3 Series G20 |
| Engine Code | B48B20 |
| Displacement / Fuel | 2.0TL petrol |
| Production Years | 2018–2023 |
| Plug type | iridium |
| Thread | M14x1.25 |
| Reach | 26 mm |
| Hex size | 14 mm |
| Electrode gap | 0.8 mm |
| Heat range | 8 |
Compatible Spark Plugs
| Brand | Part Number | Type |
|---|---|---|
| NGK | NGK ILZKBR7B8DG | OE supplier |
| Bosch | Bosch 0242240656 | OE supplier |
| Denso | Denso IKH20TT | OE supplier |
| Champion | Champion RSB59YPP | 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 0.8 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 BMW 3 Series G20 B48B20?
NGK NGK ILZKBR7B8DG, Bosch Bosch 0242240656, Denso Denso IKH20TT. All three are OE suppliers and guarantee compatibility with this engine.
How often should spark plugs be replaced on BMW 3 Series G20?
Every 60 000 km or 4 years, whichever comes first. Iridium plugs (NGK ILZKBR7B8DG) 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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