Automotive spark plugs deliver dependable ignition and smoother engine running with Bosch Spark Plug Set N40. Drivers gain confidence as misfires are less likely and acceleration stays steady. Will these plugs suit your engine and routine maintenance needs?
⚡ At a Glance
- • Ignition Performance: Consistent sparks for steady acceleration and smoother combustion
- • Best for: Owners and mechanics seeking OEM-quality replacement spark plugs
- • Not ideal for: Vehicles requiring specialised electrode materials not listed in specifications
Four nickel alloy spark plugs include a pre-set 0.9 mm electrode gap. Thread sizes 14 mm and 19 mm, spark position 5 mm and recommended tightening torque 28 Nm.
Smooth engine performance – thanks to nickel alloy electrode with copper core
Ground electrodes are made from a nickel alloy with a copper core to enhance heat conduction and maintain stable spark conditions. The alloy and core combination supports consistent ignition under normal operating temperatures.
Steady combustion reduces misfires and keeps acceleration smooth, helping everyday driving feel more reliable and responsive.
Hassle-free installation – with pre-set electrode gap and clear torque guidance
Electrode gap is factory set to 0.9 mm, removing the need for adjustment before fitting. Thread length and size specifications (19 mm and 14 mm) and a prescribed tightening torque of 28 Nm guide correct installation.
Quick fitting during routine servicing reduces installation errors and saves time in the garage or at the roadside.
Durable service life – thanks to Bosch OEM quality and robust design
Manufactured to original equipment standards with a focus on robust construction and materials, backed by Bosch's extensive ignition expertise. The design emphasises longevity and consistent performance.
Reliable longevity helps avoid frequent replacements and supports long-term engine health and fewer unexpected maintenance visits.
✨ The 4 Key Reasons for Bosch Spark Plug Set N40
- Pre-set 0.9 mm gap - Eliminates adjustment during fitment, saving time and preventing errors
- Nickel alloy electrodes - High heat conduction reduces fouling and improves spark reliability
- OEM-quality manufacture - Trusted by manufacturers for consistent performance and long-term durability
- Clear installation guidance - Preset torque spec and thread info simplify workshop replacements
📋 Technical Details at a Glance
- Category: Automotive Parts and Accessories
- Brand: Bosch
- Model: N40
- Type: Spark Plug Set
- Number of plugs: 4 nickel alloy spark plugs
❓ Frequently Asked Questions
Q: How do I check if these spark plugs fit my car?
A: Use the parts' search function at the top of the page to find the correct spark plug for the vehicle; engine requirements define the spark plug design needed.
Q: Do the plugs need gap adjustment before fitting?
A: No adjustment is necessary because the electrode gap is pre-set to 0.9 mm; follow the recommended tightening torque during installation.
Q: Will these plugs help resolve misfires or rough running?
A: User reviews indicate resolved misfires and restored smooth engine performance, and the nickel alloy with copper core supports high heat conduction for steady operation.
🏆 Our Verdict
The Bosch Spark Plug Set N40 suits drivers and mechanics who need dependable, OEM-quality spark plugs for gasoline engines. Pre-set gap, nickel alloy electrodes with a copper core, and clear torque guidance make fitting straightforward and improve ignition reliability. A sensible choice for long-term maintenance that delivers durable performance and strong value over time.
