For superior lifetime performance
OEM quality with a lifetime guarantee.
Bosch supplied the world's first high-voltage ignition system in 1902 and has continued to supply superior wire sets. State-of-the-art manufacturing technology and quality control systems ensure that Bosch Premium Wire Sets meet, and often exceed, the performance of the original equipment wire sets that they replace. That's true for all of the components, including the wire set boots and connectors. Bosch provides premium quality, pre-assembled spark plug wire sets for virtually all American, Asian, and European cars, vans, and light truck applications. And all Bosch Premium Wire Sets are backed by a "no hassle" lifetime guarantee.
Delivers maximum voltage to the spark plug for a hotter, more powerful, and longer spark resulting in optimum engine performance while reducing the chance for misfire, and eliminating radio static
Totally resistant to oil penetration, for lifetime protection against wire set failure
Stops power-robbing voltage leaks
Ensure proper fit, function and appearance while providing extreme durability for long life
Wires are tightly crimped to the connectors to exceed OEM standards, providing worry-free installation and re-installation
Spark Plug Wire Set Installation Instructions
Damage from improper installation
Any time a wire exhibits physical damage either to the wire or the boots, such as a cut, grooves or marks from chafing or scorch marks from burning, the wire should be replaced as preventative maintenance.
Additionally, some wires fail from the inside, due to a breakdown of their insulation materials. Wires should always be inspected and tested whenever a rough or erratic idle is present, poor acceleration is noticed, a decrease in fuel mileage is experienced or a vehicle fails an emissions test due to high hydrocarbon emissions or cylinder misfire fault code.
Wires should be replaced if their resistance exceeds the OEM specification for their specific application. Wires should always be replaced as a set due to the unpredictablility of the internal condition of each individual wire.
Improperly designed wire sets can cause dangerous problems including interference with the throttle cable linkage, causing the gas pedal to stay open, or resting on the exhaust manifold, which would cause the wire to burn. In addition, if wire sets are not installed correctly problems can occur. When installing wire sets, make sure the connection between the spark plug and the cap is secure to avoid ignition problems.
See the Technical Info tab to see damage caused from improper installation of wire sets.
Bosch duplicates the outside diameter of the original equipment wire for safe and secure fit in factory retainers and looms. Bosch closely follows the length of the original equipment for safe routing. Bosch always uses snug fitting original equipment style boots and connectors to ensure proper fit, function, and appearance while providing extreme durability and long life. All Bosch boots and connectors meet or exceed the high temperature requirements of the original equipment set.
MAG core wire sets emply a sprial wound, magnetic firing core design. The Bosch MAG core is upgraded to premium by replacing standard metallic wire with a tightly wound low resistance stainless steel wire.
The benefits of the Bosch MAG core includes a hotter, more powerful and longer* spark resulting in optimum engine performance while reducing the chance for misfire and eliminating radio frequency static. There is no better core available.
That's why Original Equipment Manufacturers continue to switch from conventional core construction to MAG core Bosch wire sets for all domestic and Asian cars, trucks, and SUVs are constructed using our premium MAG core technology.*Laboratory testing has shown 16% longer spark duration over standard suppression construction.
See the Technical Info tab for downloadable instructions.
Because we use only premium components, all Bosch Spark Plug Wire Sets are covered by a limited lifetime warranty. A detailed copy of this warranty is included inside every wire set box.
Spark plug wires are designed to carry the electrical voltage from the ignition system to the spark plug. They are designed to have very low resistance so the maximum amount of the energy is transferred. This transfer of energy can be interrrupted by several factors:
Not with Bosch Premium Wire Sets. Electromagnetic interference (EMI), also called radio frequency interference (RFI) is caused whenever a current flows through a wire. This current creates a magnetic field that can disrupt other sensitive electronic components such as the engines electronic control unit or radio. For Japanese and domestic applications, Bosch wire sets have a RFI absorbent shielding material to eliminate interference. In European applications, a solid copper core wire is used with OEM-style resistor connectors that absorb unwanted EMI.
© Robert Bosch GmbH