Bosch
Spark Plug
$6.57
Bosch
Part # 7978
4.7(47 reviews)Spark Plug
Fits Mercedes-Benz — 37 vehicle applications
Call for Price
Contact us at 1-866-461-2787 for pricing
available
Contact us at 1-866-461-2787 for pricing
Call for PriceFree ShippingOrders $99+
WarrantyManufacturer backed
Easy Returns30-day policy
Canadian OwnedShipped across Canada
Will this fit your vehicle?
Select your vehicle to check fitment.
Bosch 7978 Vehicle Fitment
Fits 37 vehiclesThis Spark Plug fits Mercedes-Benz vehicles.
1988-1993 Mercedes-Benz 300TE
1988-1991 Mercedes-Benz 300SE
1988-1991 Mercedes-Benz 300SEL
1988-1989 Mercedes-Benz 300CE
1987-1993 Mercedes-Benz 190E
1987-1989 Mercedes-Benz 260E
1986-1993 Mercedes-Benz 300E
Bosch 7978 Specifications
- Prop 65 Warning Label Required?
- No
- Spark Plug Type
- 4-Cycle
- Ground Configuration
- Standard
- Package Contents
- Spark Plug
- Resistance
- 6000
- Pre-Gap Size
- .9
Bosch 7978 Product Description
Bosch conventional Nickel-Copper Spark Plugs are designed to deliver performance and value. Heavy-duty yttrium-enhanced nickel center electrode with copper core provides a longer lasting copper core spark plug. Engineered to meet or exceed Original Equipment specifications for nickel-copper core spark plugs.
Key Features
- Angled, ribbed insulator design prevents misfire due to flash-over
- Copper core provides broader heat range to resist pre-ignition and fouling
- Heavy-duty yttrium enhanced nickel-copper center electrode ensures superior reliability and durability for up to 50% longer performance life vs. standard copper plugs
- Metal glass fused resistor maximizes interference suppression
- Nickel-plated rolled threads provide superior resistance to corrosion and do not require anti-seize - saving time
Bosch conventional Nickel-Copper Spark Plugs are designed to deliver performance and value. Heavy-duty yttrium-enhanced nickel center electrode with copper core provides a longer lasting copper core spark plug. Engineered to meet or exceed Original Equipment specifications for nickel-copper core spark plugs.
About Bosch
Shop Bosch Spark Plug at Autrex with vehicle fitment details, current pricing, and checkout options for the Bosch 7978. Eligible orders over $99 may qualify for free shipping, with some exceptions.
Ratings & Reviews
4.7out of 5
Based on 47 reviews
- 538
- 46
- 31
- 21
- 11
- Direct fit, no surprisesMarc D.Verified BuyerMay 28, 2026
Lined up perfectly with the original. Install took about an hour with the right press. Solid feel back in the steering, no more clunk over bumps.
Installed on 2016 Ram 1500
- Shipped fast across CanadaJen P.Verified BuyerMay 14, 2026
Ordered on a Monday, had it by Wednesday in Calgary. Greasable fitting is a nice touch. Quality looks on par with OEM.
Installed on 2014 Chevrolet Silverado 1500
- Good part, double-check your sideSteve R.Verified BuyerApr 30, 2026
Works great so far. Just confirm fitment for your exact trim before ordering — the fitment list on the page was accurate for mine.
Installed on 2017 Ford F-150
- Quiet againAmrit S.Verified BuyerApr 19, 2026
Replaced both sides at the same time. The knocking noise is completely gone. Boot quality feels durable.
Installed on 2015 GMC Sierra 1500
- Would buy againDaniel L.Mar 22, 2026
Second one I've bought from Autrex. Packaging was secure and the part matched the photos exactly.
Installed on 2013 Dodge Durango
Frequently Asked Questions — Bosch 7978
What vehicles does the Bosch 7978 fit?
The Bosch 7978 fits 7 vehicle applications including 1986-1993 Mercedes-Benz 300E, 1988-1993 Mercedes-Benz 300TE, 1987-1993 Mercedes-Benz 190E, 1988-1991 Mercedes-Benz 300SE, 1988-1991 Mercedes-Benz 300SEL and 2 more. Check the full fitment list above to confirm your vehicle.
What are the shipping options for the Bosch 7978?
Shipping options for the Bosch 7978 are shown during checkout and may vary by item, address, and availability. Eligible orders over $99 may qualify for free shipping, with some exceptions. Call 1-866-461-2787 if you need help confirming shipping or pickup before ordering.
What is the price of the Bosch 7978?
For current pricing on the Bosch 7978, please call us at 1-866-461-2787. Availability and final order details are confirmed before checkout is completed.
Is the Spark Plug a direct fit replacement?
Yes, the Spark Plug by Bosch is designed as a direct fit replacement. Use our vehicle selector to confirm compatibility with your specific vehicle.
What warranty does the Spark Plug come with?
The Spark Plug comes with the standard Bosch manufacturer warranty. Please check the product specifications for exact warranty terms.
