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Spark plug for car

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Replacement of Spark plug: Video repair guide
How to change spark plug on BMW X5 E53 TUTORIAL | AUTODOC

How to change spark plug on BMW X5 E53 TUTORIAL | AUTODOC Top brands that produce Spark Plug: BOSCH, STARK, SACHS, SKF, VAN WEZEL, VALEO, LuK,...

Step by Step Video Tutorial for Do-it-yourself Auto Repair. Become an amateur mechanic with Autodoc.

Engine spark plug for Top car maker
Spark plug set in brand quality: Top manufacturers
  • Original NGK Spark plug
  • Original BOSCH Spark plug
  • Original RIDEX Spark plug
  • Original DENSO Spark plug
  • Original CHAMPION Spark plug
  • Original BERU Spark plug
  • STARK
  • FEBI BILSTEIN
  • HELLA
  • KAMOKA
  • MAGNETI MARELLI
  • VALEO
  • VEMO
  • TOPRAN
  • MASTER-SPORT
  • JP GROUP
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Best-selling products:
The best-selling replacement parts from the Spark plug section. We have a large selection of spare parts from different brands for Spark plug and further low-price offers in our range of parts
-28%
Buy Engine spark plug NGK 95770
Spark Plug
Article number: 95770
£ 13,05

(Price per item)

incl. 20% VAT , excl. delivery costs,
  • Spanner Size: 14 mm
  • Outer thread [mm]: 12,0
  • Thread Length [mm]: 26,5
  • Spark Position [mm]: 5,0
  • Spark Plug: Iridium Middle Electrode, 1 - Earthed Electrode, interference Suppression 5 kOhm, with gasket seat
  • Version: Bi-Hex
  • NGKSpark Plug
  • Item number95770
  • Manufacturer's suggested retail price£ 18,13
  • Our price £ 13,05
  • Condition  New
Details
-28%
Buy Spark plug set DENSO K20TT
Spark Plug
Article number: K20TT
£ 2,92

(Price per item)

incl. 20% VAT , excl. delivery costs,
  • Spanner Size: 16
  • Thread Length [mm]: 19
  • Spark Plug: 1 - Earthed Electrode
  • Product line: Nickel TT
  • Tightening Torque [Nm]: 22
  • Diameter [mm]: 14
  • Weight [g]: 43
  • DENSOSpark Plug
  • Item numberK20TT
  • Manufacturer's suggested retail price£ 4,06
  • Our price £ 2,92
  • Condition  New
Details
-28%
Buy Spark plug DENSO IKH24
Spark Plug
Article number: IKH24
£ 10,61

(Price per item)

incl. 20% VAT , excl. delivery costs,
  • Spanner Size: 16
  • Thread Length [mm]: 26,5
  • Spark Plug: 1 - Earthed Electrode
  • Product line: Iridium Power
  • Tightening Torque [Nm]: 22
  • Diameter [mm]: 14
  • Weight [g]: 48
  • DENSOSpark Plug
  • Item numberIKH24
  • Manufacturer's suggested retail price£ 14,73
  • Our price £ 10,61
  • Condition  New
Details
-28%
Buy Engine spark plug DENSO ITV22
Spark Plug
Article number: ITV22
£ 10,63

(Price per item)

incl. 20% VAT , excl. delivery costs,
  • Spanner Size: 16
  • Thread Length [mm]: 25
  • Spark Plug: 1 - Earthed Electrode
  • Product line: Iridium Power
  • Tightening Torque [Nm]: 22
  • Diameter [mm]: 14
  • Weight [g]: 47
  • DENSOSpark Plug
  • Item numberITV22
  • Manufacturer's suggested retail price£ 14,76
  • Our price £ 10,63
  • Condition  New
Details
-28%
Buy Spark plug set NGK 91970
Spark Plug
Article number: 91970
£ 14,51

(Price per item)

incl. 20% VAT , excl. delivery costs,
  • Spanner Size: 14 mm
  • Outer thread [mm]: 12,0
  • Thread Length [mm]: 25,0
  • Spark Position [mm]: 3,5
  • Spark Plug: Fixed SAE connector, Iridium Middle Electrode, 1 - Earthed Electrode, interference Suppression 5 kOhm, with taper gasket seat
  • NGKSpark Plug
  • Item number91970
  • Manufacturer's suggested retail price£ 20,15
  • Our price £ 14,51
  • Condition  New
Details
-28%
Buy Spark plug NGK 2001
Spark Plug
Article number: 2001
£ 54,32

(Price per item)

incl. 20% VAT , excl. delivery costs,
  • Spanner Size: 16 mm
  • Outer thread [mm]: 14,0
  • Thread Length [mm]: 19,0
  • Spark Position [mm]: 0,3
  • Spark Plug: with lock tab, Iridium Middle Electrode, 1 - Earthed Electrode, interference Suppression 5 kOhm, with gasket seat
  • NGKSpark Plug
  • Item number2001
  • Manufacturer's suggested retail price£ 75,45
  • Our price £ 54,32
  • Condition  New
Details
-28%
Buy Engine spark plug DENSO SK16HR11
Spark Plug
Article number: SK16HR11
£ 10,43

(Price per item)

incl. 20% VAT , excl. delivery costs,
  • Spanner Size: 16
  • Thread Length [mm]: 26,5
  • Spark Plug: 1 - Earthed Electrode
  • Product line: Iridium
  • Tightening Torque [Nm]: 22
  • Diameter [mm]: 14
  • Weight [g]: 48
  • DENSOSpark Plug
  • Item numberSK16HR11
  • Manufacturer's suggested retail price£ 14,48
  • Our price £ 10,43
  • Condition  New
Details
-28%
Buy Spark plug set DENSO FK20HR11
Spark Plug
Article number: FK20HR11
£ 11,75

(Price per item)

incl. 20% VAT , excl. delivery costs,
  • Spanner Size: 16
  • Thread Length [mm]: 26,5
  • Spark Plug: 1 - Earthed Electrode
  • Product line: Super Ignition Plug
  • Tightening Torque [Nm]: 22
  • Diameter [mm]: 14
  • Weight [g]: 48
  • DENSOSpark Plug
  • Item numberFK20HR11
  • Manufacturer's suggested retail price£ 16,32
  • Our price £ 11,75
  • Condition  New
Details
Spark plug: choose from 6104 options on AUTODOC

Spark plug from 24 manufacturers at prices from 0,71£ to 159,71£

The bestselling products:
K20TT K16TT T20TT XU22TT 4339 2397
From popular manufacturers:
NGK BOSCH RIDEX DENSO CHAMPION BERU
For popular car brands:
FORD VW MERCEDES-BENZ BMW AUDI VAUXHALL
Spark plug – technical details:
Spark Plug: Spark Position [mm]: Spanner Size:
1 - Earthed Electrode Unscrewable SAE connector 3 5,2 16 14 mm Bi-Hex
Nickel Middle Electrode interference Suppression 5 kOhm 3,5 5 20.6 14
with gasket seat Fixed SAE connector 6 0,3 - -

Learn more about Spark plug - operation method, diagnosis, causes of faults and replacement intervals.

Spark plugs are parts which generate an electric discharge to ignite the fuel-and-air mixture inside the engine combustion chambers. Their key elements are electrodes; when connected to high voltage, they form an electric arc. The temperature of the spark can reach several thousand kelvins, which ensures instant combustion of the fuel-and-air mixture.

Types

Depending on the central electrode material:

  • Copper. They last for about 15.000 – 20.000 kilometres.
  • Nickel. These spark plugs can operate efficiently for 30.000 kilometres.
  • Silver. They have excellent thermal conductivity. Their working lifespan is about 30.000 kilometres.
  • Iridium. These plugs can serve for up to 60.000–120.000 kilometres. They help to reduce fuel consumption and the amount of harmful emissions.
  • Platinum. They are resistant to corrosion and erosion. Such plugs ensure the optimal combustion of the fuel-and-air mixture. They withstand up to 100.000 kilometres of mileage.

Depending on the heat range:

  • Hot. They are equipped with a long insulator. Such parts reach the self-cleaning temperature quickly, but they are also quick to reach the temperature which leads to dieseling. Such devices are suitable for engines running under moderate loads.
  • Cold. They have a short insulator. These spark plugs are resistant to overheating. But they require more time for reaching the self-cleaning temperature. They are recommended for use in highly-loaded engines.

Besides, the products may have different electrode design and quantity. For instance, their central electrode may feature a V-shaped notch, the side electrode – a U-shaped slot. Using 2 or 3 side electrodes allows freeing the area directly above the central one. This increases the lifespan of the parts and optimizes their operation.

Operating tips

Refuel your car only at proven petrol stations, if you want spark plugs to work efficiently for long. Poor-quality fuel contains many impurities. Change the motor oil in due time. Also, do not ignore air filter replacement intervals. Always make sure the engine and its components are working properly. Check and adjust the timing belt tension regularly, this helps to prevent failures in engine valve timing. Clean the fuel injectors from time to time. While installing the spark plugs, thoroughly clean the spark plug wells and tighten the parts with the torque specified in the owner’s manual for your engine.

Symptoms of malfunctions

In most cases, even if only one part is defective, the engine starts misfiring and its operation becomes unstable. Most clearly you could detect these symptoms during a cold start. Also, you can notice a significant increase in fuel consumption and engine power loss. As a result, the vehicle accelerates too slowly. The engine becomes harder to start when it’s cold outside. “Check Engine” warning light may come up on the dashboard. The most common causes of such engine malfunctions are soot and carbon deposits on the electrodes. They impede the flow of current and spark formation. Sometimes, problems are caused by molten electrodes, cracked insulator or damaged connectors.

Causes of malfunctions

Using poor-quality petrol may lead to deposit formation on spark plugs. The same thing happens if the cylinder head gasket is worn and lets some coolant enter the combustion chambers. Dieseling, plug overheating caused by cooling system malfunctions, too big timing advance also lead to deposit formation. Soot build-up occurs when oil enters the combustion chambers. This may be caused by worn-out piston rings and valve guides, dried out and shrinking valve stem seals, broken turbocharger.

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In our online shop, you can buy spark plugs from all popular brands. Apart from the wide product range, we offer affordable prices, numerous promotions, specialist advice and fast delivery.