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Ignition coil for car

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Replacement of Ignition coil: Video repair guide
How to change ignition coils and spark plugs LEXUS GS 2 TUTORIAL | AUTODOC

How to change / change / install / replacement ignition coils and spark plugs on LEXUS GS 2 TUTORIAL | AUTODOC Top brands that produce ignition...

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

Coil pack for Top car maker

Ignition coil pack in brand quality: Top manufacturers

  • RIDEX
  • BOSCH
  • NGK
  • DELPHI
  • BERU
  • HELLA
  • STARK
  • ABAKUS
  • MEAT & DORIA
  • FEBI BILSTEIN
  • HITACHI
  • DENSO
  • CHAMPION
  • DENCKERMANN
  • MAGNETI MARELLI
  • BREMI
  • METZGER
  • ERA
  • VALEO
  • MEYLE
  • ELRING
  • ASHIKA
  • HERTH+BUSS ELPARTS
  • BLUE PRINT
More

Best-selling products:

The best-selling replacement parts from the Ignition coil section. We have a large selection of spare parts from different brands for Ignition coil and further low-price offers in our range of parts
-22%
Coil pack 48041 in original quality
Ignition Coil
Article number: 48041
£ 28,94
incl. 20% VAT , excl. delivery costs,
  • Number of Poles: 4
  • Ignition Coil: Connector Type SAE
  • Number of inlets / outlets: 1
  • NGK  Ignition Coil
  • Item number  48041
  • Manufacturer's suggested retail price   £ 37,10
  • Our price   £ 28,94
  • Condition  New
Details
-22%
Ignition coil pack ZSE032 in original quality
Ignition Coil
Article number: ZSE032
£ 31,04
incl. 20% VAT , excl. delivery costs,
  • Number of Poles: 4
  • Voltage [V]: 12
  • Number of connectors: 1
  • Ignition Coil: Connector Type SAE, incl. spark plug connector
  • Connector type: Spark Spring
  • Length incl. plug [cm]: 18
  • BERU  Ignition Coil
  • Item number  ZSE032
  • Manufacturer's suggested retail price   £ 39,80
  • Our price   £ 31,04
  • Condition  New
Details
-22%
Engine coil 245025 in original quality
Ignition Coil
Article number: 245025
£ 26,03
incl. 20% VAT , excl. delivery costs,
  • Number of Poles: 2
  • Ignition Coil: Connector Type DIN
  • Coil Ignition System: Transistor Ignition (TI)
  • Weight [kg]: 0,79
  • VALEO  Ignition Coil
  • Item number  245025
  • Manufacturer's suggested retail price   £ 33,37
  • Our price   £ 26,03
  • Condition  New
Details
-22%
Engine coil pack 0 221 503 485 in original quality
Ignition Coil
Article number: 0 221 503 485
£ 38,71
incl. 20% VAT , excl. delivery costs,
  • Rated Voltage [V]: 14
  • BOSCH  Ignition Coil
  • Item number  0 221 503 485
  • Manufacturer's suggested retail price   £ 49,63
  • Our price   £ 38,71
  • Condition  New
Details
-22%
Ignition coil GN10475-12B1 in original quality
Ignition Coil
Article number: GN10475-12B1
£ 24,80
incl. 20% VAT , excl. delivery costs,
  • Number of Poles: 3
  • Voltage [V]: 12
  • Version: OEM Std
  • Trim Level: Pencil Coil
  • Plug Type: Female
  • DELPHI  Ignition Coil
  • Item number  GN10475-12B1
  • Manufacturer's suggested retail price   £ 31,80
  • Our price   £ 24,80
  • Condition  New
Details
-22%
Coil pack CE20030-12B1 in original quality
Ignition Coil
Article number: CE20030-12B1
£ 22,43
incl. 20% VAT , excl. delivery costs,
  • Number of Poles: 4
  • Voltage [V]: 12
  • Version: OEM Std
  • Trim Level: Pencil Coil
  • Plug Type: Female
  • DELPHI  Ignition Coil
  • Item number  CE20030-12B1
  • Manufacturer's suggested retail price   £ 28,75
  • Our price   £ 22,43
  • Condition  New
Details
-22%
Ignition coil pack 48408 in original quality
Ignition Coil
Article number: 48408
£ 29,69
incl. 20% VAT , excl. delivery costs,
  • Number of Poles: 4
  • Ignition Coil: Connector Type SAE
  • Number of inlets / outlets: 1
  • NGK  Ignition Coil
  • Item number  48408
  • Manufacturer's suggested retail price   £ 38,07
  • Our price   £ 29,69
  • Condition  New
Details
-22%
Engine coil ZS177 in original quality
Ignition Coil
Article number: ZS177
£ 52,76
incl. 20% VAT , excl. delivery costs,
  • Number of Poles: 3
  • Voltage [V]: 12
  • Number of connectors: 1
  • Required quantity: 6
  • Connector type: Spark Spring
  • BERU  Ignition Coil
  • Item number  ZS177
  • Manufacturer's suggested retail price   £ 67,64
  • Our price   £ 52,76
  • Condition  New
Details
Ignition coil: choose from 16990 options on AUTODOC

Ignition coil from 85 manufacturers at prices from 2,63£ to 487,02£

The bestselling products:
245104 11893 CE20030-12B1 48206 245058 245025
From popular manufacturers:
RIDEX BOSCH NGK DELPHI BERU HELLA
For popular car brands:
BMW VW MERCEDES-BENZ FORD AUDI VAUXHALL
Ignition coil – technical details:
Ignition Coil: Number of Poles: Connector type:
Flush-Fitting Pencil Ignition Coils Connector Type SAE 2 3 Spark Spring Rasthuelse
Distributer Coil Connector Type DIN 4 7 DIN+Bracket -
incl. spark plug connector Connector Type, saw teeth 6 - - -

Learn more about Ignition coil - operation method, diagnosis, causes of faults and replacement intervals.

An ignition coil is a unit designed for converting low-voltage current into high-voltage. High-voltage current is then supplied to a spark plug, which generates a spark between its electrodes and ignites the air-and-fuel mixture.

Types

  • Distributor and can-type coils. They form one spark per one crankshaft rotation. It is supplied to the spark plug in the corresponding cylinder with the help of an ignition distributor. These parts are inexpensive and reliable. They can feature a built-in output stage that can limit the current supplied by the coil, switch it off when it’s overheating, detect a short circuit, and perform computer diagnostics of the unit.
  • Dual-spark (distributorless). They generate two sparks for a pair of cylinders at once. But the air-and-fuel mixture is ignited only in one cylinder, another spark is “wasted”. Such devices are more compact. They work without a distributor and don’t require synchronization with a camshaft. However, they are only suitable for engines with an even number of cylinders.
  • Coil-on-plug (pencil). There is one coil per each spark plug, usually mounted directly on top of it. However, in some engines, they can be connected via high-voltage cables. They provide stable and powerful spark formation, which ensures complete and even fuel combustion. They allow shutting down one of the cylinders, if necessary, to avoid damaging sensors and other units. They require synchronization with the camshaft. Several coils can be combined in so-called coil packs. They guarantee the lowest ignition voltage loss.
  • Dual-coil. Such devices combine two ignition coils in one casing. They are connected directly to the corresponding spark plug. They allow reducing the ignition lag and adjusting the ignition timing more accurately.

Operating tips

Never hang an ignition coil by its wires during inspection or replacement of ignition system components. Do not attempt to disassemble it or detach the connector. Do not apply extra force when attaching the electrical connections. First, make sure that you’ve connected all the wires correctly. Never hit the ignition coil casing. Tighten the threaded joints with a torque specified by the car manufacturer. It is not recommended to apply oils and sprays onto electrical contacts: this may increase the connection resistance or cause a short circuit.

Before washing the engine compartment, cover all the electrical components with plastic bags. Remove leaks from the engine and expansion tanks for technical fluids.

Symptoms of malfunctions

You can usually notice the signs of ignition coil short circuit during visual inspection. As a rule, black spots, cracks and longitudinal streaks can be found on its surface. In this case, part of the current will be diverted to the casing, therefore spark formation in one of the cylinders will be failing. The engine starts misfiring, especially in rainy weather. When the part fails completely, misfiring occurs regardless of environmental humidity level. Vehicle dynamics becomes worse. In cars with a single can- or distributor-type coil, the engine might not start at all when it fails.

Causes of malfunctions

The ignition coil often breaks down due to overheating. This can be caused by cooling system malfunctions, improperly adjusted ignition timing, putting the vehicle under excessive loads. Extreme temperatures can melt the casing and cause the contacts to burn or short-circuit.

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faq
What are the symptoms of a broken ignition coil?

Typically, when the component breaks down, the following symptoms occur:

  • The engine works unstable, especially in cold weather.
  • A strong burnt smell comes from the component.
  • The “Check Engine” dashboard indicator is on.
  • Engine power significantly reduces after pressing the accelerator pedal.
  • Fuel consumption increases.
  • The engine starts heavily and stalls during driving.
  • The engine vibrates during idling.
  • Black smoke with a fuel smell comes from the exhaust pipe.

All these symptoms can also indicate malfunctioning of other parts, such as high-voltage cables and others. Examine the whole ignition system if you notice these symptoms.

How to check the condition of an ignition coil?

First, inspect the component. It shouldn’t have cracks, dents, black spots and other defects. After this, check the correctness of wires connection using a diagram from the vehicle’s service and repair manual.

Next, measure the winding resistance by connecting the probes of a multimeter to the respective terminals. Remember to refer to the car workshop manual, as nominal values for an ignition coil can be different for various car models. Typically, on most cars, the primary winding has standard resistance measurements within the range of 0,5–3,5 Ohm, and the secondary winding should have 5–16 kOhm.

For thorough diagnostics, an oscillograph is necessary. That is why it is better to visit a car workshop if you fail to detect the problem yourself.

How to install an ignition coil yourself?

Carefully read the vehicle’s service and repair manual before the replacement. You will need:

  • spanners of proper sizes to unscrew fasteners;
  • an ignition coil removal tool;
  • electrical contact grease;
  • a clean cloth to wipe dirt;
  • a torque wrench to tighten fasteners.

The replacement algorithm:

  1. Shut down the engine and wait till it cools down.
  2. Disconnect the negative terminal from the battery.
  3. Remove the plastic cover protecting the part.
  4. Take a photo or mark the cable connection.
  5. Disconnect the cables from the component.
  6. Unscrew the fasteners and remove the part.
  7. Clean its mounting location from dirt.
  8. Apply a special grease to the part’s connector.
  9. Install the new part and tighten its fasteners with a torque recommended by the vehicle manufacturer.
  10. Connect the cables using the photo you’ve taken earlier or follow the markings.
  11. Connect the battery negative terminal.
  12. Make sure that the part works properly.