New Bosch Coil Design for BMWs

As part of the comprehensive Bosch strategy to help equip the automotive workforce of the future in the areas of science, technology, engineering and math (STEM) education, The Bosch Aftermarket Division and Automotive Service Solutions Division have built relationships with a variety of technical schools and provide advice and counsel on curricula, encourage mentorships and apprenticeships, and donate a variety of diagnostic tools and automotive aftermarket products to support schools in their various educational efforts.

Now, together with the Bosch Community Fund, these Divisions have established an endowment of $100,000 to the University of the Aftermarket Foundation.This endowment will provide scholarships each year to students enrolled in accredited automotive, heavy-duty or diesel programs, beginning in the 2015 school year.

According to Odd Joergenrud, regional president, Bosch Automotive Aftermarket North America, the endowment is an investment in the future: “The future of the automotive industry depends on equipping new talent to fill a wide array of positions, including automotive technicians. “As the number 1 global OEM and Aftermarket company, for both domestic and import vehicles, Bosch is actively involved in developing a variety of powertrains, including gasoline, diesel and hybrids. We naturally want to encourage students to pursue automotive technology careers,” Joergenrud said.

“As automotive technology becomes increasingly sophisticated, vehicles require more in-depth diagnostic techniques, tools, equipment and knowledge. The career opportunities for automotive technicians will continue to expand accordingly,” said Rich Wolf, president, Bosch Automotive Service Solutions.

Students can apply for the Bosch Automotive scholarship beginning Sept. 15, 2014, thru March 31, 2015, for the 2015 school year. Information and applications are available at or by contacting Michael Loth, project manager of training for Bosch Automotive Service Solutions, at [email protected].

New Bosch Coil Design for BMWs – Where’s the “Snap?”

Newly-redesigned Bosch coils for BMWs, part numbers 0 221 504 464/00124 and 0 221 504 470/00044 have had a number of technicians and field installers wondering what happened to the “snap.”

At the center of the concern over the new design connector is that the “snap” previously heard with the old design, giving an indication that the coil had been properly installed, is no longer present. The absence of that sound has raised some concern of a design fault that could cause the unit to fail prematurely causing engine misfire or other issues. Rest assured that this is not the case.

Some technicians believe that the coil was held in place by a connection between the contact bolt of the spark plug and contact inside the coil, and that this “snap” must always be heard. In reality the ignition coil is held in 2 places: 1) by the rubber boot that slips over the ceramic part of the spark plug, and 2) by the sealing lips at the upper end of the coil.

With the newly-designed coil, the customary “snap” is no longer heard nor is it an indication that the coil has been properly installed. This new design does, however, provide better coil performance at the spark plug connection point, which was the area that concerned some technicians. In other words, the original design actually gripped the spark plug tip and felt more secure; whereas the new design uses a contact spring on the spark plug tip and this design may not feel like the connector is gripping the spark plug, but in reality it does the job just as well or better than the old design.

Aesthetically the change of the collar/housing around the coil body from a metallic to a plastic housing, and the spark plug connector are obvious improvements for the appearance of this coil body and provides improvements in fit, form, and function as intended by BMW. Bosch and BMW have also used this newer connector design in hundreds of thousands of OE BMW coils in recent years with no performance problems or other issues.

Old design coil with catch mechanism producing “snap”
New design coil with HV bush in coil and contact spring