Essential Ignition and Tune-Up Products for 2021 Audi A4 Quattros

from

$205.49

Spark Plug Wire Set

from

$16.79

NGK Coil on Plug Boots are built to stringent OEM tolerances, combining original equipment fit, design and outstanding durability. NGK Coil on Plug Boots are manufactured using only premium silicone and always include any required internal springs and ferrite resistors for superior performance and RFI noise suppression. Bridging the important link between ignition coil and spark plug, COP boots should always be replaced with NGK Coil on Plug Boots at the time as changing spark plugs to prevent ignition problems such as flashover.

Product Features:

PREMIUM GRADE SILICONE: Designed to withstand harsh environments
OEM MATCHED: Includes all required internal springs and ferrite resistors for superior performance and RFI noise suppression

from

$184.99

NGK tinned copper core wire sets provide excellent OE fit, performance and durability. High-temp premium silicone outer jacket and inner EPDM/silicone insulation contain high voltage currents for excellent dielectric strength. As required on certain Europ

Product Features:

PERFECT FIT FOR YOUR VEHICLE: Built to OEM tolerances with OE quality or better materials
BUILT TO LAST: Outer Jacket built to withstand temperatures greater than 250 degrees C, inner insulation EPDM or silicone for best dielectric strength
STAINLESS STEEL TERMINALS: Provide the highest possible retention to ensure positive connections through the life of the set
CYLINDER LEAD ID: Cylinder lead identification tags where possible make installation easier

from

$9.49

Coil On Plug Insulator Boot: Spring included, Designed for direct fit

from

$182.51

The Karlyn Ignition Wire Set incorporates two layers of high grade silicone for superior heat and voltage protection. The double extruded Silicone-over-Silicone wire contains 19 strands of tinned copper core which provides super conductivity and corrosion resistance.

Product Features:

OE-Equivalent.
OEM style connectors for easy Installation.
Resistant to high temperatures, corrosion and vibration.
Ignition noise suppressed.
Includes O.E. Type Connectors, Looms, Sensors and Harness Clips when required

from

$11.14

Prenco Spark Plug Connectors are constructed in our Canadian facility using only premium quality components. All connectors are designed and constructed to match OE fitment and performance. Complete import/domestic coverage, OE quality, OE performance, and OE reliability.

Product Features:

OE-Equivalent and a direct fit application
High profile insulation to prevent arching.
Engineered to withstand extremes in temperatures

from

$152.92

OE-Equivalent.
OEM style connectors for easy Installation.
Resistant to high temperatures, corrosion and vibration.
Ignition noise suppressed.
Includes O.E. Type Connectors, Looms, Sensors and Harness Clips when required

from

$25.99

CARQUEST premium engine management products provide the right products for a wide range of domestic and import applications. Delivering the highest performance and durability under demanding conditions.

Product Features:

Premium quality materials for longer service life
Sealed connections (where applicable) to prevent environmental corrosion and performance issues
Global coverage for import and/or domestic applications
OE specified wire gauge to ensure a reliable electrical connection
Designed to meet or exceed OE specifications in form, fit and function

from

$31.49

WVE is a leading source of advanced vehicle electronics components for replacement applications in the automotive aftermarket and original equipment applications. WVE offers high-technology manufacturing along with innovative solutions and improvements to

from

$37.64

Kit Contains: 4) High Temperature Leads and Terminal – Pre-Assembled in an OE Type Connector. 4) Heat Shrink Butt Connectors. 1) Terminal Extractor Tool. Failed or Burned Up V with Audi Coils are Most Commonly Caused By Poor Electrical Connections, Wire Harness Breaks or Fouled Spark Plugs. Ignition Coil Harness/Connector Repair Kit Contains: 4) High Temperature Leads and Terminal – Pre-Assembled in an OE Type Connector. 4) Heat Shrink Butt Connectors. 1) Terminal Extractor Tool. Failed or Burned Up V with Audi Coils are Most Commonly Caused By Poor Electrical Connections, Wire Harness Breaks or Fouled Spark Plugs.

from

$60.99

from

$46.52

Ign. Coil Connector

from

$19.99

Premium quality materials for longer service life
Sealed connections (where applicable) to prevent environmental corrosion and performance issues
Global coverage for import and/or domestic applications
OE specified wire gauge to ensure a reliable electrical connection
Designed to meet or exceed OE specifications in form, fit and function

from

$32.99

Intermotor® is a complete engine management import line that includes ignition and electrical relays, switches and sensors with a concentration on high technology categories such as computerized engine controls, fuel injection, and emission controls with coverage for every part number with an import nameplate. Intermotor® parts are unrivalled for quality, original fit, form, function, and coverage providing a genuine import part in every box. Intermotor® is the import leader by design.

Product Features:

100% pure copper windings in primary and secondary bobbins improve durability and provide higher resistance to internal shorts and dielectric breakdown
Electronic ignition module profile and feedback signal ensures proper OE fit, form, and function
Thermoplastic housing withstands heat stress for enhanced durability
Internal core made from grain-oriented electrical steel limits loss factor within magnetic circuit to reduce heat that may reduce coil endurance
External core made from oriented silicon steel ensures durability and longevity
Neodymium magnet produces max high voltage output at all speeds
Stainless steel spring resists corrosion
Tin-plated brass terminals improve electrical contact and protect against corrosion

from

$44.49

NGK ignition coils are manufactured to meet or exceed OE standards for the highest durability and operational performance, so they can be installed with confidence. NGK and their family of automotive products have over 80 year’s experience and are driven by extreme dedication to innovation, performance and quality. Developed and rigorously tested in our ISO 17025 accredited test lab under the most extreme conditions, NGK’s coil designs will outperform all others – far beyond operational environments a vehicle would actually experience

Product Features:

OE QUALITY: Vacuum-sealed premium epoxy resin and thermoplastic coil housings provide superior dielectric strength, voltage insulation and durability
OPTIMAL PERFORMANCE: Precision coil windings and laminations maximize outputs, custom NGK ASIC chipset optimizes efficiency, prevents component damage
EASE OF INSTALLATION: NGK Ignition Coils include ignition control module, premium high temperature coil boot, and jumper harnesses where required
THE NGK DIFFERENCE: Featuring superior materials and design enhancements.
EXTENSIVE TESTING: NGK ignition coils must pass extreme testing during manufacturing to ensure the highest quality and durability standards are met
PRODUCT ENGINEERING: Advanced flow and stress modeling systems preemptively identify and avoid common failure points found in OE and competitor coils

from

$59.99

Ignition Coil

from

$36.05

100% pure copper windings in primary and secondary bobbins improve durability and provide higher resistance to internal shorts and dielectric breakdown
Electronic ignition module profile and feedback signal ensures proper OE fit, form, and function
Thermoplastic housing withstands heat stress for enhanced durability
Internal core made from grain-oriented electrical steel limits loss factor within magnetic circuit to reduce heat that may reduce coil endurance
External core made from oriented silicon steel ensures durability and longevity
Neodymium magnet produces max high voltage output at all speeds
Stainless steel spring resists corrosion
Tin-plated brass terminals improve electrical contact and protect against corrosion

from

$27.05

The Intermotor brand has built its reputation by engineering and distributing a full line of genuine import parts – parts that are unrivaled for quality, original look, fit, form & function, as well as coverage.

Product Features:

Our Coil-on-Plug assemblies are manufactured from the finest components for optimum performance and a long service life under all operating conditions
Neodymium in the core creates the strongest magnetic field and produces max high voltage output at all speeds
High dielectric epoxy is injected into the case and pulled into a vacuum to eliminate air pockets and prevent moisture intrusion or thermal breakdown
Our reinforced bobbins prevent voltage flashover for an extended service life
As a tier I manufacturer with engineering and design capabilities second to none, our ignition coils are made to the highest quality standards

from

$26.45

Every WSO ignition coil is developed and designed for its specific application, and engineered for maximum performance. WORLD SOURCEONE ignition coils are designed to operate reliably and dependably under all operating conditions and engine rpm ranges, providing the highest engine performance, low exhaust emissions, and fuel economy objectives. WSO Direct Ignition Coils are designed to adapt the required energy output to match engine-operating conditions and deliver the optimum energy level needed to ignite a diluted stratified charge.

Product Features:

OE-Equivalent and a direct fit application
Superior, reliable performance compared to competitive products
Lower cost alternative to original equipment
No additional time consuming steps needed for installation
Factory original equipment connectors
Improved coil efficiency reduces the need to generate excessive high voltage
Designed to provide durability and performance
Noise abatement technology to eliminate audible coil noise
Lower primary inductance provides high-speed performance
Maximum available voltage under all operating conditions
TS 16949 Certification

from

$42.83

BERU ignition coils are developed vehicle-specific according to OEM requirements with or without built-in electronic modules and are manufactured using the latest computer-controlled technology.

Product Features:

High-precision ignition component
Meets or exceeds the OE specifications for durability and performance
Extremely temperature resistant
Radio-Frequency Interference (RFI) Suppression
Rational computer-controlled manufacturing techniques
High-tech quality based on zero-defect program
With or without electronics module depending on the vehicle type

from

$9.49

Champion® Double Platinum Power™ spark plugs deliver more powerful performance. Featuring exclusive Heat-Active™ alloy, platinum fine wire center electrode and platinum pad ground electrode provide maximum life and sharper spark focus.

Product Features:

Double Platinum Power – Premium Spark Plug. More Powerful Performance.
Platinum center and ground electrode for greater wear resistance
Maintains stable operating temperature under all engine loads
Fine-wire center electrode for greater ignitability
V-trimmed ground electrode promotes sharper spark focus
Heat-Active™ alloy allows electrodes to reach optimal temperature

from

$9.79

ACDelco Gold (Professional) Double Platinum Spark Plug are a high quality alternative to Original Equipment (OE) parts. With a copper core and double platinum pads on the center electrode, these plugs are designed to deliver long-lasting performance. These premium aftermarket replacement spark plugs are manufactured to meet your expectations for fit, form, and function. ACDelco Gold (Professional) parts are manufactured to meet your expectations for fit, form, and function, making them a smart choice for General Motors vehicles, as well as most makes and models, including special applications. These high-quality parts are backed by General Motors. Some ACDelco Gold parts may have formerly appeared as ACDelco Professional.

Product Features:

One-piece, fired-in suppressor seal blends three glass types for a gas-tight seal that helps reduce radio frequency and engine interference, regulate spark plug energy, and protect against compression pressures for long life
Double platinum point pad on center and ground electrode offer excellent durability and consistent voltage demands to help reduce wear on ignition system
Pure copper core results in cooler electrode temperature for maximized durability and fouling resistance
Some ACDelco Gold parts may have formerly appeared as ACDelco Professional
Premium aftermarket replacement part
Manufactured to meet specifications for fit, form, and function for General Motors vehicles as well as most makes and models

from

$11.99

NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response. The Iridium fine wire center electrode’s durability is six times harder than platinum. Iridium alloy’s extremely high melting point is perfect for today’s engines. For even greater performance consider upgrading to an NGK Ruthenium HX plug.

Product Features:

SINGLE IRIDIUM TIP: Fine wire 0.6 millimeter iridium tip center electrode ensures high durability and a consistently stable spark
IRIDIUM ALLOY CENTER ELECTRODE: Iridium’s density (6x that of platinum) and extremely high melting point is perfect for modern high efficiency engines
TAPERED CUT GROUND ELECTRODE: Reduced quenching design produces outstanding ignitability, improved acceleration, fuel efficiency and durability
SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
RECOMMENDED USAGE: Modified or high performance applications, or as an upgrade to OE nickel alloy spark plugs

from

$11.79

Increased performance with World’s smallest Iridium Center Eletrode (0.4mm).

Product Features:

World’s smallest Iridium Center Electrode (0.4mm) for improved spark for maximum combustion
Patented 360-degree laser welding assembly process
U-groove and taper cut ground electrode to maximize flame propagation.
Withstands temperatures greater than 4000░ Fahrenheit
Burnished nickel plating for high temperature endurance and superior corrosion resistance
Wide range of part numbers for thousands of applications, including classic and collector cars
Iridium Power
Superior Performance: Engineered for maximum performance under extreme conditions, this spark plug delivers more horsepower, faster and easier starts, and fewer misfires under heavy loads.
Enhanced Fuel Efficiency: Thanks to its advanced design and patented technology, the Iridium Power plug improves fuel efficiency, making it an economical choice for your vehicle.
Low Voltage Requirement: The DENSO Iridium Power spark plug requires 5,000 volts less to fire compared to conventional spark plugs, ensuring reliable ignition with lower energy consumption.
Durable Iridium Material: Constructed with a durable iridium center electrode tip and a flat seat type, this spark plug offers long-lasting performance and reliability.

from

$14.79

Maximum Performance, OE Replacement, KEC6WYPB-1 – the ultimate element for your engine. This premium spark plug features a fine-wire iridium center electrode and a platinum ground electrode, ensuring the sharpest spark focus for maximum performance. The iridium center electrode delivers maximum life, while the V-trimmed ground electrode promotes greater ignitability. With a Heat-Active alloy, the electrodes reach optimal temperature quickly, maintaining stable operating temperatures under all engine loads. This spark plug is designed to provide superior performance and longevity, making it the perfect choice for any engine.

Product Features:

Champion Iridium – Maximum Performance. Premium Spark Plug
Iridium center electrode delivers maximum life
Fine-wire center electrode and V-trimmed for greater ignitability
V-trimmed ground electrode promotes sharper spark focus
Maintains stable operating temperature under all engine loads
Heat-Active alloy allows electrodes to reach optimal temperature quickly
Platinum Ground Electrode: Equipped with a platinum ground electrode, this spark plug promotes greater ignitability and enhances overall engine efficiency.
OE Replacement: Designed as an original equipment replacement, the Champion Iridium Spark Plug ensures compatibility and superior performance for any engine.
Resistor Type: This spark plug includes a resistor type, which helps in reducing electromagnetic interference, ensuring smooth and reliable engine operation.

from

$5.79

OEM specified special ground electrode configuration.

Product Features:

OEM specified special ground electrode configuration
Precision machine-rolled threads reduce seizing and cross-threading in delicate aluminum heads
Wide range of part numbers for thousands of applications, including classic and collector cars
Lasts twice as long as most conventional plugs
100% pre-fired to assure reliable operation
U-Groove Conventional

from

$10.79

Increased performance with World’s smallest Iridium Center Eletrode (0.4mm).

Product Features:

World’s smallest Iridium Center Electrode (0.4mm) for improved spark for maximum combustion
Patented 360-degree laser welding assembly process
U-groove and taper cut ground electrode to maximize flame propagation.
Withstands temperatures greater than 4000░ Fahrenheit
Burnished nickel plating for high temperature endurance and superior corrosion resistance
Wide range of part numbers for thousands of applications, including classic and collector cars
Iridium Power
Superior Performance: Designed for maximum performance under extreme conditions, this spark plug delivers more horsepower, faster and easier starts, and fewer misfires under heavy loads.
Enhanced Fuel Efficiency: The advanced iridium technology of the DENSO Iridium Power spark plug contributes to better fuel efficiency, making it an economical choice for your vehicle.
Low Voltage Requirement: This spark plug requires 5,000 less volts to fire compared to conventional spark plugs, ensuring reliable ignition with lower energy consumption.

from

$3.99

This spark plug features a platinum twin-tip design and a titanium-enhanced ground strap, ensuring superior performance and longevity. The center electrode tip material is made of platinum, providing excellent durability and consistent spark. Additionally, the flat seat type ensures a secure fit, making it an ideal choice for reliable and efficient ignition in your vehicle.

Product Features:

Platinum Twin-Tip Design: The Denso Platinum TT Spark Plug features a unique twin-tip design, enhancing ignition efficiency and performance.
Titanium-Enhanced Ground Strap: Equipped with a titanium-enhanced ground strap, this spark plug ensures superior durability and longevity.
Platinum Center Electrode Tip: The center electrode tip is made of platinum, providing excellent durability and a consistent spark for reliable ignition.
Superior Performance: Designed for enhanced ignition, this spark plug offers reliable and efficient performance, making it a top choice for vehicle maintenance.

Top Picks for 2021 Audi A4 Quattro Ignition Coils and Boots

Upgrade Audi A4 Quattros with top-quality Ignition Coils and Boots parts, including 4 OEM and aftermarket selections for your 2021 model.

show more show less

from

$72.99

Delphi OE technology ignition products are validated to match the vehicles system; OE quality replacement parts for the right fit , form and function; Delphi coils provide OE performance, durability and electromagnetic capacity level requirements.

Product Features:

We back our ignition coil design with proven materials, such as high quality wires and wire coating that resists the cracks, pin holes and imperfections that most often lead to failure issues
Delphi ignition coils are designed to operate as part of an integral engine management system to insert power into spark plugs and ensure fast starts; consistent engine performance and optimized fuel efficiency
Delphi uses winding process techniques to control the length of wire between adjacent windings; that’s important since more length means greater voltage differences and can create more pressure that could break down the insulation and wire coating
We back our ignition coil design with proven materials, such as high quality wires and wire coating that resists the cracks, pin holes and imperfections that most often lead to failure issues

from

$19.99

Premium quality materials for longer service life
Sealed connections (where applicable) to prevent environmental corrosion and performance issues
Global coverage for import and/or domestic applications
OE specified wire gauge to ensure a reliable electrical connection
Designed to meet or exceed OE specifications in form, fit and function

from

$56.99

Carquest Premium ignition coils meet or exceed original equipment (OE) specifications and are developed by top OE/OES manufacturers to ensure superior performance. All of our Carquest Premium ignition coils are developed by IATF 16949 certified manufacturers for consistent durability and long-lasting performance. These ignition coils use high-quality components and will utilize optimized designs on applications where the OE ignition coil had frequent failures. We require stringent testing standards to ensure proper fit and performance for each application and stand behind our Carquest Premium ignition coils with an industry-leading warranty. Carquest Premium ignition coils are part of our Carquest Vehicle Solutions, which is a full line of engine management and electronics products that help control ignition, fuel delivery and emission systems. Carquest Vehicle Solutions are OE-quality parts designed, engineered and tested by world-class manufacturers to ensure a reliable and long-lasting repair.

Product Features:

Computer-Aided Design (CAD), laser scanning and 3D printing – utilizing Fused Deposition Modeling (FDM) and Stereolithography (SLA) – in the part design process ensures speed-to-market and a precise fit guaranteed.
100% pure copper precision-wound windings increase coil life and ensure reliability and maximum coil output when needed.
Highly conductive aluminum alloy secondary terminal guarantees secondary coil terminals will not oxidize (rust), will provide excellent conductivity, extended coil life and will not cause excessive stress on the primary control circuit.
100% thermo-shock and vibration tested to ensure superior performance in extreme conditions.
100% end-of-line tested to ensure confidence and product reliability, every time.

from

$45.25

Ignition Coil

2021 Audi A4 Quattro Ignition and Tune-Up Products

Intermotor Red Wire – Spark Plug Wire Set (Part No.51776)

NGK – Coil on Plug Boot (Part No.58936)

NGK – Spark Plug Wire Set (Part No.57145)

Carquest Premium – Coil On Plug Insulator Boot: Spring included, Designed for direct fit (Part No.35-7176)

Karlyn – Ignition Wire Set (Part No.F102086267KAR)

Prenco – Prenco Spark Plug Connector (Part No.F101086258PRN)

Karlyn – Karlyn Ignition Wire Set (Part No.F102060738KAR)

Carquest Premium – A/C Pressure Transducer Connector (Part No.PTA1151)

Carquest Premium – Ignition Coil Connector (Part No.HAC1004)

Karlyn – Ignition Coil Connector Kit, Repair Kit (Part No.F3004331069KAR)

Carquest Premium – Ignition Coil Connector (Part No.PTA3184)

Dorman – Ign. Coil Connector (Part No.F3004706868DOR)

Carquest Premium – Ignition Coil Connector (Part No.PTA1566)

Carquest – Ignition Coil (Part No.E891)

NGK – Ignition Coil: Meets or Exceeds Original Equipment Specifications, 1 Piece (Part No.48978)

Carquest Premium – Ignition Coil (Part No.EBC2003)

Carquest – Ignition Coil (Part No.E1075)

Carquest – Ignition Coil (Part No.E983)

WSO – Direct Ignition Coil – (Coil on Plug) (Part No.F3005397857WSO)

Beru – Direct Ignition Coil – (Coil on Plug) (Part No.F3005397857BER)

Champion – Double Platinum & Power Spark Plug Exceptional Perf OE Replacement RC10PYPB4 (Part No.7546)

ACDelco – Double Platinum Spark Plug (Part No.41-801)

NGK – Iridium IX Spark Plug: Single Iridium Fine Wire, BKR6EIX (Part No.6418)

DENSO – Iridium Power Spark Plug: Maximum Spark Energy, 0.4mm Iridium Tip, IK16 (Part No.5303)

Champion – Iridium Spark Plug: Maximum Performance, OE Replacement, KEC6WYPB-1 (Part No.9069)

DENSO – U-Groove Spark Plug: OE Performance, lasts 30K+ Miles, K20TXR (Part No.5063)

DENSO – Iridium Power Spark Plug: Maximum Spark Energy, 0.4mm Iridium Tip, IK22 (Part No.5310)

DENSO – Platinum TT Spark Plug with Twin-Tip Design for Enhanced Ignition (Part No.4503)

Carquest Premium – Coil On Plug Insulator Boot: Spring included, Designed for direct fit (Part No.35-7176)

Worldpac – SPARK PLUG (Part No.F10004070398BOS)

Delphi – Ignition Coil (Part No.GN10632)

Carquest Premium – Ignition Coil Connector (Part No.PTA1566)

Carquest Premium – Ignition Coil: Meets or Exceeds Original Equipment Specifications, 1 Piece (Part No.EBC1291)

Autopart International Inc – Ignition Coil (Part No.F30001928013API)