4pcs Spark Plug Replacement for OE#12120046646,12122455258, 12mm x 1.25 Thread, 14mm Bi-Hex, Pre-Gap 0.030in (0.75mm), Resistor Type, Iridium Fine-Wire, Compatible with BMW i8 2014-2020
| Manufacturer Part Number | 12120046646-495-4 |
|---|
Spark Plug for ignition tune-up (High Power type). OE#12120046646. Specs (per manufacturer spec sheet): 12mm x 1.25 thread, gasket seat, 28.5mm reach (1.12in), 14mm bi-hex, cup terminal, heat range 8, pre-gap 0.030in/0.75mm, resistor type, iridium fine-wire center electrode. Helps support stable combustion and smooth idle when replaced on schedule. Catalog note: superseded by 12122455258 (exchangeable) and also listed as 12120055028—confirm by OE/vehicle manual before ordering.
Install location: engine cylinder head (spark plug wells), accessed from the top of the engine near the ignition coil(s). Replace on a fully cool engine; follow your service manual for any battery-disconnect steps. Clean around the well before removal; use a 14mm bi-hex spark plug socket; start threads by hand to avoid cross-threading; torque to the vehicle’s specification (do not guess). Verify plug gap per the service manual; do not apply anti-seize unless your manual explicitly calls for it. Reinstall coil/boot firmly and route connectors correctly.
Compatible with 2014 BMW i8 Engine Cylinder Head Spark Plug Compatible with 2015 BMW i8 Engine Cylinder Head Spark Plug Compatible with 2016 BMW i8 Engine Cylinder Head Spark Plug Compatible with 2017 BMW i8 Engine Cylinder Head Spark Plug Compatible with 2018 BMW i8 Engine Cylinder Head Spark Plug Compatible with 2019 BMW i8 Engine Cylinder Head Spark Plug Compatible with 2020 BMW i8 Engine Cylinder Head Spark Plug Confirm fitment by OE#12120046646 and your vehicle manual/service catalog (production changes possible; not a universal plug).
Troubleshooting&related parts: worn plugs can contribute to misfire, rough idle, hard starting, reduced fuel economy, or a flashing/steady check-engine light. If you see oil in the plug wells, inspect the valve cover gasket; if boots are cracked or coils show corrosion, consider servicing ignition coils/boots at the same time. For best results, replace the full set required by your engine and follow the maintenance interval in the service manual. Always match by OE number for compatibility.
OE#12120046646 Ignition Spark Plug
Replacement spark plug designed to match OE number 12120046646. Always confirm fitment by OE number and your vehicle manual/service catalog before purchase.
Key Specs (verify against your manual)
Thread: 12mm x 1.25; Seat: gasket; Reach: 28.5mm
Hex: 14mm bi-hex; Terminal: cup; Resistor type
Pre-gap: 0.030in (0.75mm); Heat range: 8; Iridium fine-wire center electrode
Function&benefits
Supports stable ignition and efficient combustion when replaced at the recommended interval.
Can help address symptoms caused by worn plugs (results depend on overall ignition/fuel condition).
Common symptoms of worn spark plugs
Rough idle, hesitation, hard starting, misfire codes, reduced fuel economy.
Install notes
Install location: engine cylinder head (spark plug wells). Replace only on a cool engine. Torque and gap must follow the vehicle service manual—do not guess. Start threads by hand to avoid cross-threading. Do not use anti-seize unless the manual instructs.
Common application example: Compatible with 2014-2020 BMW i8 (confirm by OE number; production changes possible).
Packing and shipping
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Packaging Regulation : |
Wooden Box / Carton |
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Delivery time : |
7~14 days(About) |
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Conditions : |
New and Genuine |
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