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This product was last offered at the strikethrough price on
06-14-2026
This product was last offered at the strikethrough price on
06-14-2026
If you're experiencing hard starting, flaky charging, or other electrical issues, your engine ground strap may be the culprit. On E9X BMWs, the engine ground strap is a thin, non-insulated cable that spans from the left engine mount arm to the frame horn. Despite the seemingly simple nature of this part, on older cars, it is known to cause massive headaches. Due to its non-insulated design, years of exposure to water, dirt, and road salt will cause the wire to corrode, ultimately leading to complete failure. A break in this cable will cause an open circuit, resulting in issues with the vehicle's electrical system and potentially leading to a no-start condition.
To solve this issue, ECS has engineered an exact-fit, upgraded ground strap for your E9X BMW! Unlike its OEM counterpart, this design features insulated, large-gauge copper wire for dependable conductivity and long-lasting durability. Additionally, factory-style lugs are zinc-coated, crimped, and soldered, ensuring protection against corrosion and oxidation.
Whether you're replacing a visibly corroded strap or proactively preventing failure, this solution from ECS is sure to provide lasting performance and protection.
FEATURES
Direct-fit replacement and upgrade for RWD E82/E88, E84, and E9X applications Solves intermittent grounding issues caused by aging OEM straps Clean, stealthy design that fits seamlessly in factory engine bays Factory length and lug orientation for drop-in fitment 2 AWG tinned copper cable for excellent conductivity and corrosion resistance Zinc-coated lugs, crimped and soldered to resist moisture and oxidation Black UL1015-grade insulation withstands oil, heat, and abrasion Discreet ECS label for a clean, OEM+ look Replaces OEM part numbers 12427549393, 12427795404, and 12427790559.
This product was last offered at the strikethrough price on
06-13-2026
This product was last offered at the strikethrough price on
06-13-2026
This product was last offered at the strikethrough price on
06-14-2026
This product was last offered at the strikethrough price on
06-14-2026
If you're experiencing hard starting, flaky charging, or other electrical issues, your engine ground strap may be the culprit. On E9X BMWs, the engine ground strap is a thin, non-insulated cable that spans from the left engine mount arm to the frame horn. Despite the seemingly simple nature of this part, on older cars, it is known to cause massive headaches. Due to its non-insulated design, years of exposure to water, dirt, and road salt will cause the wire to corrode, ultimately leading to complete failure. A break in this cable will cause an open circuit, resulting in issues with the vehicle's electrical system and potentially leading to a no-start condition.
To solve this issue, ECS has engineered an exact-fit, upgraded ground strap for your E9X BMW! Unlike its OEM counterpart, this design features insulated, large-gauge copper wire for dependable conductivity and long-lasting durability. Additionally, factory-style lugs are zinc-coated, crimped, and soldered, ensuring protection against corrosion and oxidation.
Whether you're replacing a visibly corroded strap or proactively preventing failure, this solution from ECS is sure to provide lasting performance and protection.
FEATURES
Direct-fit replacement and upgrade for RWD E82/E88, E84, and E9X applications Solves intermittent grounding issues caused by aging OEM straps Clean, stealthy design that fits seamlessly in factory engine bays Factory length and lug orientation for drop-in fitment 2 AWG tinned copper cable for excellent conductivity and corrosion resistance Zinc-coated lugs, crimped and soldered to resist moisture and oxidation Black UL1015-grade insulation withstands oil, heat, and abrasion Discreet ECS label for a clean, OEM+ look Replaces OEM part number 12427549396.
Featuring silver fine wire center electrode - Superior ignition ability increases engine power!
Although these come pre-gapped we highly recommend double checking the plug gap upon receiving them and adjusting to your vehicle's individual needs.
For the N55/S55, these plugs are 2 Steps Colder, while for the N54 they are 3 Steps Colder.
Note that BMW Spark plugs require a special 12 point 14mm thin walled socket. We have several options available in our catalog that will help you get your spark plugs changed. The BMW part number for the tool is 83300495560, but we recommend the Schwaben brand T#373727 that won't cost you an arm and a leg.
Brisk Silver Racing Spark Plugs are the best solution for high performance and racing engines. Silver Spark Plugs provide many unique and beneficial characteristics, Silver is taking spark plug technology to a whole new level, here are many reasons why our Brisk Silver Racing Spark Plugs are beneficial for your engines performance. Silver is the best conductor of any metal! It conducts 560% more electricity & 481% more heat than Platinum, and 276% more electricity & 177% more heat than Iridium.
Silver spark plug electrodes transfer electricity & heat better than any other spark plug material resulting in the most powerful spark! This is beneficial for a full complete combustion of the available fuel and air in the combustion chamber, combustion efficiency creates horsepower gains.
Key Benefits and Applications of Brisk Silver Racing Spark Plugs:
Silver is the best Electric and Heat Conductor - the best material for performance and racing spark plugs
Superior Ignition Ability Increases Engine Power Lower Required Supplied Ignition Voltage
Good Resistance to Fouling and Easier Starts
Race Engines and Engines with Hard to Ignite Fuels
Supercharged / Turbocharged / Nitrous engines
Excellent for Total Loss Ignition Systems
Excellent Spark Plug Choice for any Vehicle, Stock or Modified, even for High Mileage Vehicles and Vehicles With Oil Consumption Problems
Spark Plug Specs:
12mm thread
1.05"(26.1mm) reach
14mm Bi-Hex
gasket seat
non-projection tip
resistor
Silver center el.
cut-back ground electrode
* Replacement for NGK SILZKBR9F8S (BMW# 12120042724)
* One heat range colder than NGK 97506 SILZKBR8D8S
When it comes time to change your spark plugs, you may wonder about colder stepped spark plugs as many others have. Colder spark plugs work by pulling more heat out of the engine's cylinders (making them "colder") and dissipating it into the engine's head, which is then cooled by the cooling system. Depending on how you have your engine built, these could be a great addition! Colder plugs can help prevent engine knock and prevent the tip of the spark plug from melting or misfiring.
There are two rules that most people tend to go by when deciding on which spark plugs to buy:
The first rule of thumb is that with every 100 horsepower added, you should run spark plugs that are a step colder than your stock plugs. This is generally accepted across the motorsports community but unfortunately isn't always the most accurate measurement of when you will need colder plugs.
The second rule is to go a step colder any time you massively alter cylinder temperatures by adding forced induction to an NA engine, by increasing compression ratio, after altering timing in a major way, or by changing fuel types to something with a higher octane rating such as racing fuel.
Adding spark plugs that are a step colder outside of these conditions, with no real change to the engine, can actually hurt more than help by leading to spark plugs fouling quicker than normal and by making the car harder to start in cold weather conditions.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
The GENIUS5 is an exceptional addition to our lineup boasting incredible power, top-notch performance, energy efficiency, and a compact design. The GENIUS5 is a versatile 6-volt and 12-volt charger, maintainer, and desulfator with a 5-amp rating. It's engineered for use with lead-acid batteries in automotive, marine, and deep-cycle applications, covering flooded, gel, AGM, maintenance-free variants, and even lithium-ion batteries.
Features:
WARNING: This product contains chemicals known to the state of California to cause cancer, birth defects, and/or reproductive harm. See above warning label as well as http://www.p65warnings.ca.gov for further information on Proposition 65 warnings.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
The GB40 is a compact lithium-ion battery jump starter pack capable of delivering 1,000 amps, allowing you to jump-start a dead battery within seconds. Equipped with patented safety technology, it ensures spark-proof connections and reverse polarity protection, making it user-friendly and safe for everyone. Not only does it serve as a powerful battery booster, but it also functions as a portable power source for charging USB devices such as smartphones and tablets. Designed to support vehicles like cars, boats, RVs, trucks, and more, it can handle gas engines up to 6 liters and diesel engines up to 3 liters.
Features:
WARNING: This product contains chemicals known to the state of California to cause cancer, birth defects, and/or reproductive harm. See above warning label as well as http://www.p65warnings.ca.gov for further information on Proposition 65 warnings.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
The NOCO Boost X GBX75 is a portable lithium jump starter crafted for 12-volt batteries in vehicles with gasoline engines up to 8.5 liters and diesel engines up to 6.5 liters. This versatile tool is suitable for a wide array of vehicles, including cars, motorcycles, trucks, ATVs, boats, RVs, vans, SUVs, tractors, and more. Featuring an all-new design, the GBX75 offers extreme jump-starting power, ensuring robust engine starts with ease. With a rating of 2500 amps, this portable lithium car battery jump starter delivers maximum energy with each start. It's not just an upgrade; it's part of our new Extreme Series, delivering exceptional performance and reliability.
Features:
WARNING: This product contains chemicals known to the state of California to cause cancer, birth defects, and/or reproductive harm. See above warning label as well as http://www.p65warnings.ca.gov for further information on Proposition 65 warnings.
The BMW E60 M5 Crank Case Test Cap is designed to facilitate accurate testing of crankcase pressure across a range of vehicle models. This versatile test cap is compatible with early and late model vehicles equipped with steel, aluminum, or plastic valve covers. Featuring a multi-diameter fitting, it connects directly to IMIBs, handheld manometers, and smoke machines, eliminating the need for adapters and ensuring precise readings without leaks.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
The GENIUS10 is a powerhouse among our chargers known for its exceptional performance, energy efficiency, and compact design. The GENIUS10 is a versatile 6-volt and 12-volt charger, maintainer, and desulfator with a robust 10-amp rating. It's engineered to handle lead-acid batteries used in automotive, marine, and deep-cycle applications, covering flooded, gel, AGM, maintenance-free types, as well as lithium-ion batteries.
Features:
WARNING: This product contains chemicals known to the state of California to cause cancer, birth defects, and/or reproductive harm. See above warning label as well as http://www.p65warnings.ca.gov for further information on Proposition 65 warnings.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
The NOCO Boost X GBX155 is a portable lithium jump starter designed for 12-volt batteries in vehicles with gasoline engines up to 10.0 liters and diesel engines up to 8.0 liters. This versatile device is suitable for cars, motorcycles, trucks, ATVs, boats, RVs, vans, SUVs, tractors, and more. Featuring an all-new design, the GBX155 delivers extreme jump-starting power, ensuring robust engine starts. With a rating of 4250 amps, this portable lithium car battery jump starter provides maximum energy with every start. It's not just an upgrade; it's part of the new Extreme Series, offering unparalleled performance and reliability.
Features:
WARNING: This product contains chemicals known to the state of California to cause cancer, birth defects, and/or reproductive harm. See above warning label as well as http://www.p65warnings.ca.gov for further information on Proposition 65 warnings.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
The GB50 is a highly portable, lightweight, and compact lithium-ion jump starter designed for 12-volt batteries. It allows you to safely jump-start a dead battery in seconds, offering up to 30 jump starts on a single charge. Featuring spark-proof technology and reverse polarity protection, the Boost XL is safe and easy for anyone to use.
In addition to its jump-starting capabilities, the GB50 lithium jump starter comes with a high-output 200 lumen LED flashlight with seven light modes. It can hold its charge for up to one year and includes a USB battery pack for recharging personal devices on the go, providing up to 6 smartphone recharges. The Hot and Cold LED indicators on the internal battery help determine when the Boost is outside operating temperatures, safeguarding your batteries and devices.
Rated at 1,500 Amps, the GB50 is suitable for use on gasoline engines up to 7 liters and diesel engines up to 4.5 liters, making it versatile for cars, vans, boats, SUVs, trucks, and more. The package includes the new HD Precision Boost Battery Clamps for easy connection to any 12V lead-acid battery, along with a USB charging cable, microfiber storage bag, a 1-year hassle-free limited warranty, and free lifetime customer support.
Features:
WARNING: This product contains chemicals known to the state of California to cause cancer, birth defects, and/or reproductive harm. See above warning label as well as http://www.p65warnings.ca.gov for further information on Proposition 65 warnings.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
The GENIUSPRO50 is an advanced 6-volt, 12-volt, and 24-volt fully-automatic professional smart charger, maintainer, power supply, and battery desulfator. With temperature compensation and a rating of 50 amps, it's suitable for all types of automotive, marine, and deep-cycle batteries.
Features:
WARNING: This product contains chemicals known to the state of California to cause cancer, birth defects, and/or reproductive harm. See above warning label as well as http://www.p65warnings.ca.gov for further information on Proposition 65 warnings.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
The GB70 is a compact and powerful lithium-ion battery jump starter pack capable of delivering 2,000 amps for jump-starting a dead battery within seconds. Equipped with patented safety technology, it ensures spark-proof connections and reverse polarity protection, making it safe and user-friendly for everyone. Not only does it serve as a robust battery booster, but it also functions as a portable power source for recharging USB devices like smartphones, tablets, and more, or for powering 12-volt devices such as tire inflators and power inverters. Designed to support a wide range of vehicles including cars, boats, RVs, trucks, and more, it's compatible with gas engines up to 8 liters and diesel engines up to 6 liters.
Features:
WARNING: This product contains chemicals known to the state of California to cause cancer, birth defects, and/or reproductive harm. See above warning label as well as http://www.p65warnings.ca.gov for further information on Proposition 65 warnings.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
The NOCO Boost X GBX55 is a portable lithium jump starter tailored for 12-volt batteries in vehicles with gasoline engines up to 7.5 liters and diesel engines up to 5.0 liters. This versatile tool is compatible with a wide range of vehicles, including cars, motorcycles, trucks, ATVs, boats, RVs, vans, SUVs, tractors, and more. Featuring an all-new design, the GBX55 boasts extreme jump-starting power, ensuring robust engine starts with ease. With a rating of 1750 amps, this portable lithium car battery jump starter delivers maximum energy with each start. It's not just an upgrade; it's part of our new Extreme Series, designed to offer exceptional performance and reliability.
Features:
WARNING: This product contains chemicals known to the state of California to cause cancer, birth defects, and/or reproductive harm. See above warning label as well as http://www.p65warnings.ca.gov for further information on Proposition 65 warnings.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
The GB150 is a compact and high-powered lithium-ion battery jump starter pack, capable of delivering an impressive 3,000 amps for jump-starting a dead battery in seconds. Equipped with patented safety technology, it ensures spark-proof connections and reverse polarity protection, making it safe and user-friendly for everyone. Not only does it serve as a potent battery booster, but it also functions as a portable power source for recharging USB devices like smartphones, tablets, and more, or for powering 12-volt devices such as tire inflators and power inverters. Designed to support a wide range of vehicles including cars, boats, RVs, trucks, and more, it's compatible with gas engines up to 9.0 liters and diesel engines up to 7.0 liters.
Features:
WARNING: This product contains chemicals known to the state of California to cause cancer, birth defects, and/or reproductive harm. See above warning label as well as http://www.p65warnings.ca.gov for further information on Proposition 65 warnings.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
The NOCO Boost X GBX45 is a portable lithium jump starter designed for 12-volt batteries in vehicles with gasoline engines up to 6.5 liters and diesel engines up to 4.0 liters. This versatile tool is compatible with a wide range of vehicles, including cars, motorcycles, trucks, ATVs, boats, RVs, vans, SUVs, tractors, and more. Featuring an all-new design, the GBX45 delivers extreme jump-starting power for robust engine starts. With a rating of 1250 amps, this portable lithium car battery jump starter releases maximum energy with every start. It's not just an upgrade; it's part of our new Extreme Series, offering exceptional performance and reliability.
Features:
WARNING: This product contains chemicals known to the state of California to cause cancer, birth defects, and/or reproductive harm. See above warning label as well as http://www.p65warnings.ca.gov for further information on Proposition 65 warnings.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
The GEN5X3 is an upgraded version of NOCO's GENM3 with improved features. This model is 37% smaller yet delivers 43% more power, making it one of the most high-performing onboard marine battery chargers NOCO has ever produced. It's a three-bank onboard battery charger with a 15-amp rating (5 amps per bank) designed for 12-volt batteries, including marine, boat, starter, and deep-cycle batteries. You can independently charge and control each battery bank using selectable charging modes such as 12V, 12V AGM, 12V Lithium, and 12V Repair Mode, suitable for all types of lead-acid and lithium-ion batteries.
Features:
WARNING: This product contains chemicals known to the state of California to cause cancer, birth defects, and/or reproductive harm. See above warning label as well as http://www.p65warnings.ca.gov for further information on Proposition 65 warnings.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
The GB500+ is a powerful portable lithium jump starter delivering 6250 amps, designed to jump-start gasoline and diesel engines up to 45 liters. Its versatility extends to a wide range of vehicles and equipment, including semi-trucks up to class 8, motorhomes, coaches, buses, as well as mining, agricultural, construction, and vocational equipment with 6, 8, 12, and 16 cylinders, and beyond.
Features:
WARNING: This product contains chemicals known to the state of California to cause cancer, birth defects, and/or reproductive harm. See above warning label as well as http://www.p65warnings.ca.gov for further information on Proposition 65 warnings.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
The GENIUS2X2 represents a leap forward in power, performance, energy efficiency, and compactness. This advanced charger is a dual-bank system designed for both 6-volt and 12-volt batteries, serving as a charger, maintainer, trickle charger, and battery desulfator all in one. With a rating of 4 amps (2 amps per bank), it caters to all types of lead-acid and lithium-ion batteries, including flooded, gel, AGM, marine, and deep-cycle variants.
Features:
WARNING: This product contains chemicals known to the state of California to cause cancer, birth defects, and/or reproductive harm. See above warning label as well as http://www.p65warnings.ca.gov for further information on Proposition 65 warnings.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
The GENIUSPRO25 is a fully-automatic professional smart charger, maintainer, power supply, and battery desulfator designed for 6-volt, 12-volt, and 24-volt systems. With temperature compensation and a 25-amp rating, it's suitable for all types of automotive, marine, and deep-cycle batteries.
Features:
WARNING: This product contains chemicals known to the state of California to cause cancer, birth defects, and/or reproductive harm. See above warning label as well as http://www.p65warnings.ca.gov for further information on Proposition 65 warnings.