Spark plugs 300 + 260 M103, 200 + 230 M102 – Mercedes R107 R129 W124 W126 W201

Description

Spark plug – affordable alternative for Mercedes A0031590503 – M102 and M103 engines

This spark plug is a reliable and affordable alternative to the original Mercedes spark plug. A0031590503 / 0031590503. The original Mercedes and BOSCH Made in Germany version is no longer available, making a good alternative increasingly important for the maintenance of classic Mercedes models.

This spark plug is suitable for various Mercedes models with M102 and M103 engines and offers reliable ignition, smooth engine operation, and good cold and warm start characteristics. Thanks to the correct heat rating and electrode gap, this spark plug is an excellent choice for regular maintenance.

Suitable for Mercedes models

• Mercedes C123 230 CE

• Mercedes W123 200
• Mercedes W123 230 E

• Mercedes W124 200
• Mercedes W124 200 E
• Mercedes W124 230 E
• Mercedes W124 260 E
• Mercedes W124 300 E
• Mercedes C124 300 CE
• Mercedes S124 260 ET
• Mercedes S124 300 ET
• Mercedes S124 E300 T 4Matic

• Mercedes W126 300 SE
• Mercedes W126 300 SEL

• Mercedes W201 190 E 2.0
• Mercedes W201 190 E 2.3
• Mercedes W201 190 E 2.5-16
• Mercedes W201 190 E 2.6

• Mercedes R107 300 SL

• Mercedes R129 300 SL

• Mercedes W463 300 GE

Suitable for Mercedes engines

• M102
• M103

OEM references

• A0031590503
• 0031590503

Specifications

1. Part: spark plug.
2. Alternative to the 0031590503 / A0031590503 Bosch H8dc0 or H8dc+
3. External thread: M14 × 1.25.
4. Thread length: 17.5 mm.
5. Wrench size: 16 mm.
6. Electrode gap: 0.7 mm.
7. Affordable alternative to the original Mercedes/BOSCH spark plug.
8. Suitable for the Mercedes models mentioned above.

Important

Always check the electrode gap before installation. It must be 0.7 mm.

We recommend replacing the spark plugs preventively. every 30,000 kilometers to replace. Even when the engine is still running well, the ignition characteristics of the spark plug gradually decline, which can lead to rougher engine operation, higher fuel consumption, and reduced cold starting.

Always carefully inspect new spark plugs for damage from dropping them before installation. A dent or damage to the packaging may indicate a hairline crack in the ceramic. Damaged ceramic can come loose during use and cause serious engine damage.

Always check before purchase and installation whether the part is suitable and equivalent based on photos, description, and specifications; installed or used parts cannot be returned.