Best Spark Plugs For Audi A5

I remember when my Audi A5 started feeling sluggish, especially under hard acceleration—that’s often the first sign you need new spark plugs for Audi A5. Choosing the right set isn’t just about avoiding a misfire; it’s about restoring the crisp throttle response and optimal engine efficiency that these turbocharged German machines are known for. We’ve dug into five popular options, including comprehensive kits and standalone performance plugs, to find the best Audi A5 spark plugs that truly deliver reliable, long-lasting value.

IMAGE	PRODUCT NAME	AMAZON LINK
	UF575 Ignition Coil & 1675 Double Iridium Spark Plug for…	View on Amazon
	Ignition Coil Pack & Spark Plugs Set of 4 Compatible…	View on Amazon
	Double Iridium Spark Plug Compatible with AUDI A3 A4 A5…	View on Amazon
	BOSCH FR5KPP332S OE Fine Wire Double Platinum Spark Plug…	View on Amazon
	ApplianPar Ignition Coil and Spark Plug for Audi A3 A4…	View on Amazon

UF575 Ignition Coil & 1675 Double Iridium Spark Plug for Audi A3 A4 A5 A6 Q5 R8 TT RS4 RS5/Volkswagen Jetta Passat Tiguan Beetle CC Golf GTI Replaces# C1627 07K905715F E1075

This package is a complete solution, ideal for the A5 owner who is experiencing both misfires and rough idling. It includes four high-quality double iridium spark plugs and matching ignition coils, meaning you replace two crucial ignition system components at once. The double iridium design ensures an extremely long service life, often quoted up to 100,000 kilometers, offering consistent and stable spark delivery. This kit is designed to meet or exceed OE specifications, ensuring superior cold-start performance and a noticeable smoother running engine.

Key features that stand out:
– Complete Kit: Includes both 4 ignition coils (UF575) and 4 double iridium spark plugs (1675).
– Double Iridium Technology: Provides maximum durability and consistent ignition performance over a long lifespan.
– Superior Construction: Coils feature advanced thermoplastic connectors and internal ferrite noise suppressors to prevent radio interference.

• Pros:
  • Provides a full ignition system refresh (plugs and coils).
  • Excellent longevity due to double iridium material.
  • Designed to significantly reduce engine misfires and rough idle.
• Cons:
  • Might be overkill if your ignition coils are already in perfect condition.

Best for: The Audi A5 owner dealing with definite misfire issues who wants to replace both the coils and plugs simultaneously for maximum reliability.

Expert Opinion: This set is a fantastic value proposition because failing coils and plugs often occur close together. By replacing both, you reset the clock on your entire ignition system, guaranteeing peak performance immediately.

Ignition Coil Pack & Spark Plugs Set of 4 Compatible with Audi A4 A5 TT Volkswagen CC Tiguan & More 2.0L 2.0T Replaces# 06E905115E, UF529, 06E905115A, 06E905115C

Another excellent kit option, this set targets improved erosion resistance and maximizes fuel economy in your 2.0L A5. The coil packs are specifically designed to address common misfire issues associated with aging components, while the spark plugs themselves use a premium aluminum and porcelain construction for corrosion resistance. If you’re hunting for a solid, reliable, and cost-effective replacement that meets or exceeds OEM specifications, this UF529 replacement set should be on your list.

Key features that stand out:
– Application-Specific Coils: Designed to maximize fuel economy and reduce tailpipe emissions by providing a strong, targeted spark.
– Improved Materials: Spark plugs feature aluminum and porcelain to resist corrosion and wear.
– OEM Specification Match: Directly replaces several key OE part numbers (e.g., 06E905115E, UF529).

• Pros:
  • Excellent balance of price and quality for a full kit replacement.
  • Designed to eliminate rough running and improve mileage.
  • Direct fitment simplifies the installation process.
• Cons:
  • The specific spark plug material isn’t detailed, which may suggest standard performance compared to pure Iridium options.

Best for: Budget-conscious owners needing a full system refresh who want OE-level performance without the dealership price tag.

Expert Opinion: When an A5 hits higher mileage, these ignition kits offer peace of mind. The focus on improved abrasion resistance suggests these components are built to handle the heat and stress of a modern turbocharged engine.

Double Iridium Spark Plug Compatible with AUDI A3 A4 A5 A6 Q3 Q5 R8 RS5 TT VOLKSWAGEN CC Jetta Golf Passat Tiguan Chevy Cruze Sonic Trax Volt 1675 PFR7S8EG (Pack of 4)

If you only need spark plugs and not the coils, this standalone pack of NGK 1675 double iridium plugs is a fantastic choice for the Audi A5 2.0T. These plugs are renowned in the VW/Audi community for their reliability and performance, often replacing the OEM PFR7S8EG plugs directly. The iridium center electrode firing pin guarantees exceptional ignitability, meaning faster cold starts, quicker acceleration, and noticeable fuel economy gains. They offer the same impressive 100,000-kilometer working life as other iridium options.

Key features that stand out:
– NGK OE Replacement: Directly replaces the popular NGK 1675 and OE PFR7S8EG numbers, ensuring perfect fitment.
– Exceptional Ignitability: Engineered specifically for forced-induction (turbocharged) engines, offering powerful, stable sparks.
– Long Service Interval: Reliable performance for up to 60,000+ miles (100,000 km) before requiring replacement.

• Pros:
  • Proven performance and reliability in the VAG engine platform.
  • Excellent for maximizing power delivery and efficiency.
  • Double iridium construction offers maximum lifespan.
• Cons:
  • Only includes plugs, requiring separate purchase of coils if needed.

Best for: Enthusiasts performing routine maintenance or stage 1 tunes who are seeking maximum longevity and proven performance from their spark plugs.

Expert Opinion: The 1675 NGK is a benchmark plug for the 2.0T engine. If your coils are healthy, sticking with a high-quality double iridium standalone plug like this will provide the sharpest throttle response.

BOSCH FR5KPP332S OE Fine Wire Double Platinum Spark Plug – Single

Bosch is a name synonymous with German engineering, and their Double Platinum spark plugs are a robust, OE-quality option for your A5. While iridium is often considered the premium material, double platinum offers excellent longevity—up to 3X longer service life compared to standard copper plugs—and exceptional resistance to high heat. A key benefit of the Bosch plug is the nickel-plated rolled threads, which resist corrosion and do not require anti-seize for installation, making the job much cleaner and easier.

Key features that stand out:
– Double Platinum Design: Platinum firing pin and ground electrode inlay ensures long life and stable spark.
– No Anti-Seize Required: Nickel-plated threads simplify installation.
– Pre-Gapped: Plugs are ready to install right out of the box, eliminating the need for adjustment (always verify gap, however).

• Pros:
  • Bosch OE quality ensures perfect fit and function.
  • Excellent corrosion resistance and durability.
  • Simple installation process due to pre-gapping and special threads.
• Cons:
  • Must be purchased individually (not in a pack of four), potentially raising the overall cost slightly.

Best for: The owner prioritizing guaranteed OE quality, proven reliability, and extremely long service intervals who prefers the simplicity of platinum over iridium.

Expert Opinion: Platinum is a highly stable metal that handles the thermal cycles of a turbo engine beautifully. These Bosch plugs are a dependable choice if you prioritize strict factory compliance and hassle-free installation.

ApplianPar Ignition Coil and Spark Plug for Audi A3 A4 A5 A6 A7 A8 Quattro Allroad Q5 Q7 R8 S4 S5 S6 S8 SQ5 TT TTS VW Beetle Golf GTI Jetta Passat Rabbit Touareg 2.0 3.0 3.2 3.6 4.2 2.5

This ApplianPar kit is designed to cover a vast range of VAG group engines, including the Audi A5, offering a comprehensive replacement package of coils and plugs. While the specific material of the spark plug isn’t detailed, the kit provides a complete, cost-effective replacement solution for the entire ignition system. This broad compatibility makes it a go-to choice for workshops or individuals maintaining multiple compatible vehicles, guaranteeing a renewed ignition system performance across the board.

Key features that stand out:
– Wide Vehicle Compatibility: Fits numerous Audi and VW models beyond the A5, making inventory simple.
– Full Ignition System Replacement: Includes both ignition coils and spark plugs.
– Extensive Model Coverage: Ensures a reliable fix for various engine sizes (2.0L, 3.0L, 4.2L, etc.).

• Pros:
  • Excellent value for a complete coil and plug kit.
  • Solves common misfire and hesitation issues instantly.
  • Extremely broad fitment range for various platforms.
• Cons:
  • Less specific focus on high-performance materials compared to dedicated iridium options.

Best for: The owner looking for a highly affordable, comprehensive ignition system refresh, or those maintaining older or high-mileage A5 models where coil packs may be failing.

Expert Opinion: For a vehicle that needs basic, dependable ignition components and has no major performance modifications, this kit offers a low-cost pathway back to smooth running. It’s a great “get-it-done” solution.

Comparison Short Insights

When choosing the best spark plugs for your Audi A5, you need to weigh longevity against necessity. If you’re experiencing frequent misfires, opting for one of the complete coil and plug kits like the UF575 Ignition Coil & 1675 Double Iridium or the Ignition Coil Pack & Spark Plugs Set of 4 is usually the smart move, as a full system replacement eliminates guesswork.

For pure spark plug performance and maximum lifespan, the Double Iridium Spark Plug 1675 PFR7S8EG stands out. Iridium is harder than platinum and provides the most focused, hottest spark, which is key for a precise engine like the A5 2.0T.

The BOSCH FR5KPP332S Double Platinum provides immense durability and is often the most straightforward to install thanks to its pre-gapping and anti-corrosion threads. Platinum plugs are typically slightly more affordable than iridium and offer incredible long-term resilience.

Crucially, always verify the specific gap required for your A5 engine year and modification level, even if the plugs are listed as “pre-gapped.”

Final Verdict

Making the right choice for your Audi A5 depends entirely on your current engine condition and performance goals.

If you need a reliable, long-lasting plug only: Go with the Double Iridium Spark Plug 1675 PFR7S8EG. These are tried-and-true performance plugs that offer the best ignitability and extended maintenance intervals.

If you suspect failing coils and plugs (full refresh needed): The UF575 Ignition Coil & 1675 Double Iridium Spark Plug kit is the clear winner. You get the longevity of iridium plugs combined with new, reliable ignition coils in one package, solving misfire issues completely.

If you prioritize OE quality and easy maintenance: Choose the BOSCH FR5KPP332S OE Fine Wire Double Platinum. These plugs offer peace of mind with the Bosch name and the convenience of nickel-plated threads for simple installation.

FAQs About Best Spark Plugs For Audi A5

What maintenance interval should I follow for spark plugs in my Audi A5?

For most stock Audi A5 2.0T engines, the factory recommendation usually sits around 55,000 to 60,000 miles (approximately 88,000 to 100,000 kilometers). However, if you use high-performance iridium plugs, like the NGK 1675, you might be able to stretch that slightly. If your A5 is tuned (Stage 1 or 2), you should consider reducing the replacement interval to 30,000–40,000 miles to maintain optimal performance and prevent misfires under boost.

Should I choose Iridium or Platinum spark plugs for the Audi A5 2.0T engine?

Both Iridium and Platinum are excellent choices for modern, high-heat turbocharged engines. Iridium is generally preferred for its superior hardness and smaller center electrode, which provides the best and most stable spark delivery, crucial for maximum Audi A5 performance. Platinum offers fantastic longevity and is often slightly more cost-effective. For a stock or mildly tuned A5, Iridium (like the 1675) is generally the preferred upgrade.

How do I know if I need new ignition coils along with my spark plugs?

Ignition coil failure often presents as severe engine misfires, usually accompanied by the Check Engine Light (CEL) flashing and erratic idling. If you are replacing the spark plugs due to a misfire and the vehicle has over 80,000 miles on the original coils, it is highly recommended to replace both components simultaneously. Kits like the UF575 provide an easy way to refresh the entire ignition system.

Does the spark plug gap size change if my Audi A5 is tuned?

Yes, absolutely. A stock Audi A5 usually runs a specific gap (you must verify this with your owner’s manual or a parts supplier). However, if you have a performance tune (which increases boost pressure), the higher pressure can extinguish the spark. Tuners typically recommend a slightly reduced spark plug gap—often down to 0.024″ or 0.026″—to ensure the spark stays strong and stable under high boost conditions.

Can I install these Audi A5 spark plugs myself, or should I take them to a professional?

Changing the spark plugs for the Audi A5 is a relatively straightforward DIY job for anyone with basic mechanical knowledge. You’ll need a spark plug socket, a ratchet, and an extension. The coils sit right on top of the plugs under the plastic engine cover, making access quite easy. However, if you are uncomfortable applying the correct torque specification or gapping the plugs, professional installation is always advisable to prevent damage to the cylinder head threads.

What are the signs of a faulty spark plug in an Audi A5?

Common symptoms of a failing Audi A5 spark plug include rough idling (the engine feels shaky), noticeable hesitation or lack of power during acceleration, difficulty starting the engine, and decreased fuel economy. In severe cases, you may also get a persistent engine misfire code (P0300 series) stored in the onboard diagnostics system.