Spark plugs Alfa Romeo 147 AR32104 (1.6 16V Twin Spark) — NGK, Bosch, Denso
Spark plugs for Alfa Romeo 147 AR32104 (1.6 16V Twin SparkL, 2001–2010) — OEM-spec NGK, Bosch, Denso and Champion part numbers with replacement interval.
Engine Specifications
| Parameter | Value |
|---|---|
| Make / Model | Alfa Romeo 147 |
| Engine Code | AR32104 |
| Displacement / Fuel | 1.6 16V Twin SparkL petrol |
| Production Years | 2001–2010 |
| Plug type | standard |
| Thread | M12x1.25 |
| Reach | 19 mm |
| Hex size | 14 mm |
| Electrode gap | 0.9 mm |
| Heat range | 6 |
Compatible Spark Plugs
| Brand | Part Number | Type |
|---|---|---|
| NGK | NGK BKR5EYA | OE supplier |
| Bosch | Bosch 0241135803 | OE supplier |
| Denso | Denso K16PR-U | OE supplier |
| Champion | Champion OE016 | aftermarket |
Replacement Interval
| Parameter | Value |
|---|---|
| Mileage | 30 000 km |
| Time | 2 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 AR32104
- Use the correct plug type — the AR32104 requires standard plugs. Upgrading from standard to iridium is acceptable.
- Check the electrode gap — verify the gap is 0.9 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 Alfa Romeo 147 AR32104?
NGK NGK BKR5EYA, Bosch Bosch 0241135803, Denso Denso K16PR-U. All three are OE suppliers and guarantee compatibility with this engine.
How often should spark plugs be replaced on Alfa Romeo 147?
Every 30 000 km or 2 years, whichever comes first. Iridium plugs (NGK BKR5EYA) have a longer service life compared to standard nickel plugs.
Can I fit a different type of spark plug in the AR32104?
Upgrading to iridium or platinum is acceptable and gives a slight improvement in cold starts. Do not change the heat range (6) — an incorrect heat range can cause pre-ignition or fouling.
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