Introducing the Bosch Ignition Coils

Bosch Ignition Coils are high-quality, reliable ignition coils designed for a wide range of vehicles. They are built to last, with a robust design that ensures consistent performance and long service life. The estimated price of Bosch Ignition Coils is around $30 to $60, depending on the model and quantity purchased. They are available for purchase through various online retailers and automotive parts suppliers.

Bosch Detailed Specifications

Here are the detailed specifications of Bosch Ignition Coils:

Primary voltage: 12V
Secondary voltage: Up to 45,000V
Resistance: 0.4-1.5 Ohms
Insulation: Class H (180°C)
Mounting style: Distributed or centralized
Operating temperature: -40°C to +150°C
Dimensions: Varies by model
Weight: Varies by model
Color: Black
Warranty: Up to 2 years

Bosch ignition coils

Bosch is the only global supplier providing its partners with a complete range of ignition components from a single source. It’s no coincidence that Bosch stands for high quality, comprehensive expertise, state-of-the-art technology and pioneering developments.

The cornerstone of Bosch competence
In the early days of automobile history, ignition was
“the problem of problems,” as Carl Benz, who played a key role in the development of the gasoline engine, stated at that time. That is, until Bosch patented a groundbreaking ignition system, the Bosch high-voltage magneto, in 1902. And with the simultaneous development of the Bosch spark plug, it paved the way for over 116 years of ignition-system expertise – which Bosch continues to broaden and deepen today.

Advantages Bosch Ignition Coils

Comprehensive product range
Original Equipment (OE) parts
100% self-developed by Bosch
Geared to vehicle manufacturers’ specifications for improved engine performance
Ignition voltage as required
Long spark duration
High dielectric strength
High temperature and vibration resistance
Reduced fuel consumption and less harmful emissions
Long service life

Bosch ignition coils offer improved driving dynamics and environmental sustainability.

Customer satisfaction Innovative technology and OE quality

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New sales potential about Bosch Ignition Coils

Comprehensive coverage: the right ignition coil for any application
Availability guarantee: ignition coils for vehicles of different ages
Superior performance, functionality and quality f High reliability and long service life
Good cold-start performance
Corrosion-resistant connections
Top-quality manufacturing
Well-matched system components from a single source: from ignition coils to ignition leads and spark plugs – including ignition distributors for older vehicles and ignition modules

Simply efficient

Supplies the spark plug electrodes with the required ignition voltage
Transforms the battery voltage (12 volts) to a voltage reaching from 15,000 to more than 30,000 volts f Keeps the spark until the air/fuel mixture ignites

How coils work

Opening the ignition coil’s primary circuit, a high- voltage pulse generates at the secondary circuit
This high voltage transfers to the spark plug either directly or by means of ignition leads
A spark produces between the spark plug electrodes, igniting the air/fuel mixture
This explosion moves down the piston and starts

From classic to state-of-the-art Ignition coils for any application
Direct and safe Single-spark ignition coils:

One coil for each spark plug
Independent high-voltage source for each cylinder
No ignition leads required, since the ignition coil is mounted directly onto the spark plugs
Advantage: the lack of high-voltage cables (ignition leads) reduces the potential for engine misfire

There are two types of single-spark ignition coils:

Compact ignition coils the high-voltage transformer is in the coil head
Pencil ignition coils the high-voltage transformer is in the cylindrical coil body

Bosch Ignition Coils

Compact Coil

Spark plug cap (silicone rubber)
Secondary winding
Primary winding
Plug
Core
Interference-suppression resistor
Spark plug contact (spring)

Pencil Coil

Primary coil body
Primary winding
Silicone housing
Plug
Secondary winding
Secondary coil body
Core
Spark-plug contact

Multi-spark Coil

One for all Multi-spark ignition coil:

Supplies ignition voltage to multiple spark plugs
Voltage is distributed to the spark plugs through the ignition wires
Robust and reliable design

Housing
Inner core
Primary winding (wire)
Primary coil body
High voltage out
High voltage pin
Outer core
Secondary wire
Secondary coil body

Cassette Coil

All-inclusive Cassette ignition coil:

One ignition coil for several spark plugs
Some models include integrated ignition module
No ignition wires required; the ignition coil is mounted directly onto the spark plugs
Advantages: reduced risk of failure or defects; easy to replace, if required

Asphalt Coil

Still going strong Asphalt ignition coil:

Contact-controlled single-spark ignition coil
Current flowing through the coil is switched on and off by a contact in the distributor
The right spare part for classic vehicles with well-known Bosch quality

Description

Bosch Ignition Coils are designed to provide reliable ignition performance and long service life. They feature a robust design that is resistant to heat, vibration, and other environmental factors that can cause damage. The coils are made with high-quality materials, including Class H insulation, which provides excellent electrical resistance and protection against high temperatures. The primary and secondary windings of the coils are designed to deliver optimal spark energy and consistent voltage output, ensuring reliable ignition and smooth engine performance.

The right choice: Bosch original equipment Counterfeits can be hazardous

High-quality Bosch ignition coils provide

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Ample ignition voltage at all times
Top-quality manufacturing
Good cold-start performance
High-quality insulation materials
High dielectric strength
Precise, corrosion-resistant connections
Long service life
Reliability and freedom from defects
Compliance with all legal requirements and safety standards
Environmental compatibility

Counterfeits of Bosch Ignition Coils

Pose dire consequences
Unfortunately, pirates exist in today’s market. They threaten not only honest companies, but also safety. Cheap copies can have dire consequences. From the outside, they are often very hard to distinguish from originals, but a look inside will reveal serious defects.

Often include design flaws
Counterfeits can run hot and can even catch fire. Cheap copies can also deliver excessive voltage to the engine control unit (ECU), ultimately destroying it.

Low-quality ignition coils can result in:

Uneven or rough idle with misses and misfires
Considerable drop in performance
Increased fuel consumption
Danger to the oxygen sensor and catalytic converter
Excessive exhaust emissions
Damage to the ECU

Technology Comparison Seeing is believing

Interference-suppression
The Bosch Ignition Coil (shown on the left) provides high quality interference-suppression winding on the coil body. The counterfeit coil (shown on the right) displays contact problems.
Electrical contacts
The Bosch coil (shown on the left) exhibits clean and secure electrical contacts, whereas the contacts on the counterfeit coil (shown on the right) are poorly soldered and dangerous.

Workshop professionals Beware of counterfeits
Only genuine Bosch parts work properly and ensure optimum engine performance combined with low emission values – without any secondary failures affecting the catalytic converter, the oxygen sensor or the ECU.

Bosch Ignition Coils Setup Guide

Installing Bosch Ignition Coils is a relatively straightforward process that can be done at home with the right tools and a bit of know-how. Here are the basic steps for installing Bosch Ignition Coils:

Disconnect the negative battery cable.
Locate the ignition coil(s) and remove the electrical connector(s).
Unscrew the mounting bolt(s) and remove the old ignition coil(s).
Install the new ignition coil(s) and hand-tighten the mounting bolt(s).
Connect the electrical connector(s) to the new ignition coil(s).
Tighten the mounting bolt(s) to the recommended torque specification.
Reconnect the negative battery cable.
Start the engine and check for proper ignition performance.

Full range of ignition components

From a single source

Innovative ignition coil technology
Bosch state-of-the-art plastic ignition coils feature both high dielectric strength and superior temperature and vibration resistance. Bosch continues to break new ground with ignition systems, including pencil ignition coils that feature primary-current control and diagnostic function.
Bosch spark plugs the driving force
The comprehensive range of Bosch spark plugs provides the right fit for practically any application — from lawn mowers to SUVs and even industrial applications.

Why Bosch

Only supplier offering full range of ignition components f Original equipment quality
Comprehensive coverage
Leading innovator of original equipment technology

Bosch diagnostics for workshop professionals
The OTC Evolve, powered by Bosch, features more than 30 million repairs, diagnostic coverage and special tests for most OBD II and CAN vehicles. The wireless VCI allows technicians to walk around the vehicle cord-free to test, diagnose, confirm and repair vehicles. A new user interface makes finding information faster and easier, including full-system full-color wiring diagrams, direct access to Identifix and other repair databases.

What drives you, drives us
The Automotive Aftermarket division provides the aftermarket and repair shops worldwide with a complete range of diagnostic and repair shop equipment and a wide range of spare parts from new and exchange parts to repair solutions for passenger cars and commercial vehicles. Its product portfolio includes products made as Bosch original equipment, as well as aftermarket products and services developed and manufactured in-house.

Troubleshooting of Bosch Ignition Coils

Here are some common problems that can occur with Bosch Ignition Coils and their solutions:

Problem: No spark or weak spark
Solution: Check the ignition coil wiring and connections for tightness and corrosion. Check the spark plugs for fouling and replace if necessary. If the problem persists, test the ignition coil for electrical resistance and replace if faulty.
Problem: Rough idling or misfiring
Solution: Check the ignition coil wiring and connections for tightness and corrosion. Check the spark plugs for fouling and replace if necessary. If the problem persists, test the ignition coil for electrical resistance and replace if faulty.
Problem: Engine stalling or hard starting
Solution: Check the ignition coil wiring and connections for tightness and corrosion. Check the spark plugs for fouling and replace if necessary. If the problem persists, test the ignition coil for electrical resistance and replace if faulty.

Pros & Cons

Pros

High-quality materials and robust construction for long service life
Excellent electrical resistance and protection against high temperatures
Optimal spark energy and consistent voltage output for reliable ignition and smooth engine performance
Relatively straightforward installation process
Up to 2-year warranty for peace of mind

Cons

May be more expensive than some aftermarket ignition coil brands
Specific models may not be available for some older or less common vehicles

Bosch Ignition Coils Customer Reviews

Bosch Ignition Coils have received mostly positive reviews from customers. Many reviewers have praised the coils for their reliability, high-quality materials, and ease of installation. However, some reviewers have reported issues with fitment or electrical resistance. Overall, Bosch Ignition Coils have a rating of 4.5 out of 5 stars on Amazon, with 83% of reviewers giving them a rating of 5 stars.

Bosch Most Common Complaints

The most common complaints about Bosch Ignition Coils include:

Incorrect fitment for some vehicles
Lower than expected electrical resistance in some units
Difficulty in removing the old ignition coil from the vehicle

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