BDFHYK
BDFHYK Iridium Spark Plugs 3199 for BMW (Set of 6)
Editor’s scorecard
Editorial scores from 0 to 10, comparable across products in this category.
Full specifications
Fit
| Subcategory | Iridium spark plug set (6-cylinder) |
| Material | Iridium center electrode, ceramic insulator |
| Vehicle compatibility | BMW 3-Series/5-Series/X3/X5/Z3/Z4 (325i/328i/330i/525i/528i/530i and Ci/xi variants) — replaces 12120037607, 12129071003, 12120141871; confirm exact trim/year on the listing |
Other details
| Style | 3199 / ILZFR6D11 cross-reference |
| Set size | 6 plugs |
Where does this part go?
Engine bay — threaded into each cylinder head
Highlighted in orange on the diagram — this is roughly where you'll find or install this part.
The review
Iridium electrodes hold their gap longer than standard plugs, which is the main reason to reach for this set on a BMW inline-6 rather than a copper equivalent. It cross-references directly to three OEM BMW part numbers, so fitment is straightforward if your model is on the list.
Pros
- Iridium for longer service life than copper
- Direct OEM part-number cross-reference
- Well reviewed at a low price per plug
Cons
- BMW-specific — confirm your exact chassis/engine code before ordering
- Small review sample relative to catalog leaders
Ideal for: BMW owners doing a scheduled spark plug replacement on a compatible inline-6 or V8.
What buyers say
Buyers report a clean idle after install; several confirm fitment on 325i/328i and X3/X5 models.
Summary based on reviews visible on Amazon at capture time.
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