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Spark Plug 06K-905-601-D
Available in stores 31 offers
Vehicle fitment 183 vehicles
Technical specifications
| Part Type | Spark Plug — Laser Platinum |
|---|---|
| OEM Part Number | 06K-905-601-D / 06K905601D |
| NGK Equivalent | PLFER7A8EG / NGK 94833 |
| Thread Size | M14 × 1.25 |
| Thread Reach | 26.5 mm |
| Hex / Spanner Size | 16 mm (5/8 inch) |
| Seat Type | Gasket seat |
| Heat Range | NGK 7 |
| Pre-set Gap | ~0.032 in / ~0.8 mm |
| Tightening Torque | ~25–30 Nm (verify with factory repair manual) |
| Brand Group | Volkswagen Group (VAG) — VW, Audi, Škoda, SEAT/Cupra, Porsche |
How to replace the Spark Plug
Replacing spark plugs on VW/Audi 1.8 TSI and 2.0 TSI engines is a straightforward DIY job. You will need a 16 mm (5/8") spark plug socket, a torque wrench, and an extension. Allow 30–60 minutes for all four plugs.
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Let the engine cool completely
Never work on a hot engine. Allow at least 30 minutes after shutdown. Installing plugs in a hot aluminum cylinder head risks cross-threading and seizing.
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Remove the ignition coil / coil-on-plug
Disconnect the coil electrical connector, then pull the coil straight out of the spark plug well. Inspect the rubber boot for cracks or carbon tracking — a damaged boot should be replaced at the same time.
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Blow out the spark plug well
Use compressed air to remove any debris from around the plug before removing it. This prevents dirt from falling into the cylinder when the plug is extracted.
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Remove the old spark plug
Insert the 16 mm spark plug socket with extension and turn counter-clockwise to loosen. Remove the plug and inspect the electrode condition — heavy deposits, melted electrodes or unusual colors can indicate engine issues worth investigating.
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Install the new plug — hand-tight first
Thread the new 06K-905-601-D in by hand until it seats. Do not re-gap fine-wire platinum plugs — the pre-set gap (~0.8 mm) is factory-set and bending the electrode risks damage.
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Torque to specification
Use a torque wrench to tighten to 25–30 Nm (verify exact value in the factory repair manual for your engine code). Overtightening damages threads in the aluminum head — undertightening allows blow-by gases past the gasket seat.
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Reinstall coils and verify
Push each coil-on-plug firmly back into its well until seated. Reconnect the electrical connector. Start the engine and check for smooth idle. Clear any stored misfire codes with a scan tool if present.
Signs of a worn part
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Misfire under load or boost
Stumbling or hesitation during acceleration — especially pronounced on turbocharged TSI engines under boost
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Rough or unstable idle
Engine shakes or vibrates at idle — typically caused by incomplete combustion in one or more cylinders
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Hard starting
Engine cranks longer than normal before firing — weak spark struggles to ignite the mixture reliably in cold conditions
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Poor fuel economy
Incomplete combustion from a weak spark wastes fuel — noticeable drop in MPG with no other obvious cause
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Check Engine Light (P0300–P0304)
Cylinder-specific or random misfire codes stored in the ECU — P0300 (random), P0301–P0304 (cylinder 1–4 specific)
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Strong fuel smell from exhaust
Unburned fuel passing through a misfiring cylinder produces a noticeable raw fuel odor at the tailpipe
Replacement intervals
Always follow the maintenance schedule in your owner's manual or VCDS/OBD service data. Engine code and market can affect the specified interval — verify for your specific application before ordering.
Frequently asked questions
What is the NGK equivalent for OEM spark plug 06K-905-601-D?
The direct NGK equivalent for 06K-905-601-D is NGK PLFER7A8EG (stock number 94833) — a Laser Platinum plug with a fine-wire platinum center electrode. NGK is the original equipment manufacturer for this part number across VAG applications. It is listed by ECS Tuning, Autodoc, and Spareto as a confirmed cross-reference for Volkswagen OE number 06K905601D.
How many spark plugs does my VW Golf / Audi A3 need?
Inline-4 engines (1.8 TSI, 2.0 TSI, 2.0 TFSI) require 4 spark plugs — one per cylinder. Always replace the full set at once rather than individual plugs. Uneven electrode wear across cylinders causes rough idle and inconsistent combustion even after replacing just one faulty plug.
What is the correct torque for 06K-905-601-D?
Most catalog sources and NGK's own guidance list approximately 25–30 Nm for gasket-seat spark plugs in aluminum cylinder heads. However, the factory repair manual for your specific engine code is the authoritative source — torque specs can vary slightly between engine variants. Using a calibrated torque wrench is strongly recommended; overtightening an aluminum head is a costly mistake.
Should I gap the 06K-905-601-D spark plug before installation?
No. The 06K-905-601-D and its NGK equivalent PLFER7A8EG are shipped with a factory pre-set gap of approximately 0.032 in (0.8 mm). Laser Platinum and iridium plugs use fine-wire center electrodes that can crack or deform if bent with a gapping tool. Install the plug as supplied — do not adjust the gap unless the manufacturer's procedure explicitly permits it for this specific part.
Can I use 06K-905-601-K instead of 06K-905-601-D?
Not necessarily. The 06K-905-601-K is a later iridium-type plug introduced for some newer VAG engine variants. While both share the same thread size and reach, heat range and electrode geometry differ between suffix revisions. Using the wrong suffix can affect combustion characteristics. Always confirm the correct part number using your full VIN and engine code before substituting one suffix for another.
Which VW and Audi models use spark plug 06K-905-601-D?
Catalog listings for 06K-905-601-D include Volkswagen Beetle, Golf, GTI, Golf SportWagen, Golf Alltrack, Jetta, Jetta GLI, Passat, and Tiguan — primarily with 1.8T and 2.0T engines from approximately 2013–2023. Audi applications include A3, A4, A5, A6, Q3, Q5, Q7 and TT on various TSI/TFSI engines. Some listings also cover SEAT Leon, Škoda Octavia and Porsche Macan 2.0L. Always verify against your specific VIN and engine code as fitment varies by production date and market.
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