Dinan Iridium Spark Plug, Heat Range 9 (Single) - BMW B48/B58/S58
Ships from the brand or distributor, usually in 3–7 business days
Make sure this fits your car
Fits: BMW M240i (F22/F23), 340i (F30/F31), 440i (F32/F33/F36), 540i (G30), 740i (G11), X3 M40i (G01), M340i (G20), M440i (G22/G23/G26), M240i (G42), Z4 M40i (G29), GR Supra (B58), and BMW S58: M3 (G80/G81), M4 (G82/G83), M2 (G87), X3 M (F97), X4 M (F98). Confirm your exact model before ordering.
- Shipping at real carrier rates
- 30-day returns on unused parts
- Fitment help before you buy
Spark plugs wear faster once you add boost, and fresh plugs are one of the simplest ways to keep a tuned B58 or S58 running cleanly. This is Dinan's iridium plug in heat range 9, sold as a single plug.
What you get
- Iridium plug in heat range 9.
- 12 mm thread, 26.5 mm reach and 14 mm hex, with a flat seat.
- Sold one at a time, so you can buy exactly the count you need.
Good to know
- The B58 and S58 have six cylinders and the B48 has four, so order six or four plugs for a full set.
Brand: Dinan · Part #: D640-0001
Ships from the brand or distributor, usually in 3-7 business days.
BMW M240i (F22/F23), 340i (F30/F31), 440i (F32/F33/F36), 540i (G30), 740i (G11), X3 M40i (G01), M340i (G20), M440i (G22/G23/G26), M240i (G42), Z4 M40i (G29), GR Supra (B58), and BMW S58: M3 (G80/G81), M4 (G82/G83), M2 (G87), X3 M (F97), X4 M (F98). Confirm your exact model before ordering.
| Model | Chassis | Years | Engine | Fits |
|---|---|---|---|---|
| M140i | F20/F21 | 2016–2019 | Gen 1 B58 | |
| M240i | F22/F23 | 2016–2021 | Gen 1 B58 | |
| 340i | F30/F31/F34 | 2016–2019 | Gen 1 B58 | |
| 440i | F32/F33/F36 | 2017–2020 | Gen 1 B58 | |
| 540i | G30/G31 | 2017–2019 | Gen 1 B58 | |
| 740i | G11/G12 | 2016–2019 | Gen 1 B58 | |
| X3 M40i | G01 | 2018–2019 | Gen 1 B58 | |
| X4 M40i | G02 | 2019 | Gen 1 B58 | |
| 640i GT | G32 | 2018–2019 | Gen 1 B58 | |
| M340i | G20/G21 | 2019–2024 | Gen 2 B58 (TU) | |
| M440i | G22/G23/G26 | 2021–2024 | Gen 2 B58 (TU) | |
| M240i | G42 | 2022–2024 | Gen 2 B58 (TU) | |
| Z4 M40i | G29 | 2019+ | Gen 2 B58 (TU) | |
| GR Supra 3.0 | A90/A91 | 2020+ | Gen 2 B58 (TU) | |
| 540i | G30/G31 | 2020–2023 | Gen 2 B58 (TU) | |
| 740i | G11/G12 | 2020–2022 | Gen 2 B58 (TU) | |
| X3 M40i | G01 | 2020+ | Gen 2 B58 (TU) | |
| X4 M40i | G02 | 2020+ | Gen 2 B58 (TU) | |
| X5 xDrive40i | G05 | 2019–2023 | Gen 2 B58 (TU) | |
| X6 xDrive40i | G06 | 2020–2023 | Gen 2 B58 (TU) | |
| X7 xDrive40i | G07 | 2019–2022 | Gen 2 B58 (TU) | |
| 840i | G14/G15/G16 | 2019+ | Gen 2 B58 (TU) | |
| INEOS Grenadier | Station Wagon/Quartermaster | 2023+ | Gen 2 B58 (TU) | |
| M340i | G20/G21 | 2025+ | Gen 3 B58 (48V) | |
| M440i | G22/G23/G26 | 2025+ | Gen 3 B58 (48V) | |
| M240i | G42 | 2025+ | Gen 3 B58 (48V) | |
| M3 | G80/G81 | 2021+ | S58 (BMW M) | |
| M4 | G82/G83 | 2021+ | S58 (BMW M) | |
| M2 | G87 | 2023+ | S58 (BMW M) | |
| X3 M | F97 | 2020–2024 | S58 (BMW M) | |
| X4 M | F98 | 2020–2025 | S58 (BMW M) |
Not sure? Email sales@b58racing.com with your VIN.
- Ships from the brand or distributor, usually in 3–7 business days.
- Shipping is charged at the carrier's rate, shown at checkout. Orders over 70 lb ship by freight for a flat $99.
- Unused parts can be returned within 30 days. Some items are marked no-refund in their description.
Full details are on our shipping and returns page.
Guides for this part
B58 Spark Plugs and Coils: Interval, Gap for Tuned Cars and a DIY Swap
Gen 1 B58s (2016 to 2019 F-chassis cars) take BMW plug 12120040551, and NGK's version of that plug is the 94201 (SILZKGR8B8S). Gen 2 B58TU cars, including the GR Supra, take BMW 12122455258 (also listed as 12125A4EF60),
B58 Common Problems by Generation (Gen 1, Gen 2 and 2025+) and the Parts That Fix Them
The B58 is one of BMW's most reliable modern engines, and most of its problems are leaks, not failures. The ones that come up again and again are the oil filter housing gasket, coolant leaks (water pump, expansion tank,
S58 Common Problems (G80 M3, G82 M4, G87 M2, X3 M and X4 M) and the Parts That Fix Them
The S58 is still a young engine, and its public problem record is short. The most serious items we found are two BMW delivery stops on small groups of early engines: a 2019 X3 M and X4 M build window where BMW replaced t
Pairs well with
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