5 Best Spark Plugs For Audi S3 Reviewed in 2025

When I started tuning my Audi S3, I quickly realized that the stock plugs just weren’t cutting it, especially after adding a little extra boost. Choosing the right set is absolutely crucial for maintaining power, preventing dreaded misfires, and ensuring engine longevity. That’s why I compiled this detailed guide on the best spark plugs for audi s3—to help you navigate the options, whether you’re running a stock setup or pushing serious horsepower through a Stage 2 tune.

IMAGE	PRODUCT NAME	AMAZON LINK
	Double Iridium Spark Plug Compatible with AUDI A3 A4 A5…	View on Amazon
	BDFHYK 94833 Platinum Iridium Spark Plugs Compatible with…	View on Amazon
	A-Premium Iridium Platinum Spark Plugs Compatible with…	View on Amazon
	BDFHYK Ignition Coil Pack 06J905110G and Iridium Spark…	View on Amazon
	BDFHYK Ignition Coil Pack UF716 and Iridium Spark Plugs…	View on Amazon

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)

This double iridium spark plug is a solid, reliable choice often referenced as an OE equivalent (NGK 1675 PFR7S8EG). It’s engineered to provide exceptional cold-start performance and deliver a consistent, stable spark, making it ideal for daily drivers who want reliability over extreme performance. The double iridium composition is designed for outstanding durability, promising up to 100,000 kilometers of consistent performance, meaning you won’t have to worry about frequent replacement intervals. This plug is a great fit if you’re keeping your S3 at or near stock power levels.

Key features that stand out:
– OE Matched Design: Replaces OE# PFR7S8EG for direct compatibility.
– Double Iridium Construction: Ensures superior longevity and robust spark consistency.
– Improved Ignitability: Provides quicker acceleration and better fuel economy compared to standard plugs.

Pros:
– Extremely long working life (up to 100,000 km)
– Excellent reliability for stock or mildly tuned S3 models
– Helps reduce emissions and improves fuel economy

Cons:
– May require gapping adjustments for highly tuned Stage 2+ setups.

Best for: Daily driven Audi S3 models running stock or mild Stage 1 tunes focusing on longevity.

Expert Opinion: This plug is the workhorse of the VW/Audi world. Its double iridium construction ensures a massive service interval, making it a great “set it and forget it” option for most owners who prioritize long-term maintenance cycles.

BDFHYK 94833 Platinum Iridium Spark Plugs Compatible with Porsche Macan,Compatible with Audi A3 A4 A5 A6 Quattro allroad Sportback Q5 Q7 S3 TT TTS Quattro,Beetle Golf Golf R Passat 1.8L 2.0L Set of 4

Designed specifically to meet or exceed OE standards, the BDFHYK 94833 set provides a fine combination of platinum and iridium materials. This composite design ensures faster and more sensitive ignition jumps, which translates directly into a noticeable increase in throttle response and power output. If your S3 has felt sluggish recently, these plugs can help revive that factory feel, offering reliable performance certified by TS16949 standards. They are specifically compatible with the 2015-2017 Audi S3 model range, ensuring an accurate fit.

Key features that stand out:
– Platinum Iridium Composite: Balances performance with extended durability.
– Sensitive Ignition Jumps: Designed for rapid ignition, optimizing power output.
– Isostatic Ceramic Insulators: Provides high strength and excellent insulation protection against heat.

Pros:
– Significant improvement in perceived power and responsiveness
– High-quality, OE-level durability and manufacturing process
– Suitable replacement for specific 2.0L TFSI engine codes

Cons:
– The mixed metal construction offers slightly less longevity than full double iridium plugs.

Best for: S3 owners seeking a cost-effective, high-performance OE replacement that refreshes ignition sensitivity.

Expert Opinion: The use of fine iridium electrodes ensures excellent ignition performance even under varying loads. This is a robust standard replacement that focuses on restoring the spirited feel of your S3 engine.

A-Premium Iridium Platinum Spark Plugs Compatible with Volkswagen Jetta, Passat, Golf, Beetle, GTI & Audi A4 allroad, A4 Quattro, Q5, Q7, A5 Sportback, A6, A3, TT Quattro & Porsche Macan, Pack of 4

A-Premium provides an excellent aftermarket solution utilizing the durable Iridium Platinum combination, engineered for maximum ignition performance across a wide range of Audi/VW applications, including the S3 (2015-2017 models). These plugs are designed alongside OEMs to ensure compatibility and flawless function. With a recommended replacement interval between 80,000 to 100,000 miles, these are built for longevity. They offer exceptional ignitability, ensuring your 2.0L engine operates smoothly and efficiently under all driving conditions.

Key features that stand out:
– Wide Fitment Range: Compatible with the 2015-2017 S3 2.0L engine codes.
– Engineered for Longevity: Replacement recommendation up to 100,000 miles.
– Maximum Ignition Performance: Provides reliable, powerful sparking, optimizing combustion.

Pros:
– Exceptional mileage interval reduces maintenance headaches
– Designed to high OEM standards for guaranteed fitment
– Improves overall efficiency and engine smoothness

Cons:
– While durable, they may not handle extreme heat from high-boost tuning as well as colder plugs.

Best for: The driver who values minimal maintenance and maximum miles between changes, while retaining strong, reliable performance.

Expert Opinion: When looking for the best spark plugs for audi s3 that prioritize long-term durability, the A-Premium blend of iridium and platinum is hard to beat. Their engineering focus on longevity makes them a solid investment.

BDFHYK Ignition Coil Pack 06J905110G and Iridium Spark Plugs XP5325 Compatible with Audi A3 A4 A5 Quattro allroad Q7 S3, Compatible with VW Golf R Replacement for UF716 UF752 GN10632 4469,Set of 4

This package stands out because it provides both new ignition coils and iridium spark plugs (XP5325), offering a complete ignition system refresh. If your S3 is experiencing rough idling, slow acceleration, or has surpassed 80,000 km on the original coils, this kit offers significant value. The high-quality ignition coils use silicon steel and imported rubber for maximum durability and reliable voltage delivery. The iridium spark plugs are designed to deliver a quick start and powerful, short-time acceleration, making your car feel “like new.”

Key features that stand out:
– Complete Kit: Includes both 4 coils and 4 iridium plugs (XP5325).
– High-Quality Coil Construction: Utilizes silicon steel material and durable Japanese/German components.
– Iridium Spark Plug Performance: Ensures rapid starts and strong acceleration.

Pros:
– Excellent value proposition by replacing two critical components simultaneously
– Eliminates potential misfires caused by aging coil packs
– Significant performance boost for high-mileage vehicles

Cons:
– The included XP5325 plugs might be a standard heat range, requiring verification for high-level tuning.

Best for: High-mileage S3 owners or those needing a complete ignition system overhaul for better reliability.

Expert Opinion: Often, when searching for the best spark plugs for audi s3, people overlook the coils. For vehicles approaching 8-10 years old, replacing the coils alongside new plugs is smart preventative maintenance, and this kit makes that process highly convenient.

BDFHYK Ignition Coil Pack UF716 and Iridium Spark Plugs LFER7BHX Compatible with Audi A3 A4 A5 A6 Q5 Q7 S3 S4 TT Volkswagen Beetle Golf Passat Jetta 1.8L 2.0L L4 UF752 06K905601B Sets of 4

Similar to the previous entry but featuring a different set of part numbers (UF716 coil and LFER7BHX plug), this BDFHYK kit is specifically targeted toward newer generation 2.0L EA888 engines, common in the S3. The combination ensures the car achieves a professional level of performance with rapid starts and powerful acceleration. The LFER7BHX plugs feature high-tech iridium electrodes and unique ceramic insulators, providing exceptional high-heat resistance and robust sparking capabilities essential for turbocharged performance vehicles.

Key features that stand out:
– Targeted OE Numbers: Specific compatibility with UF716 coils and LFER7BHX plugs (a recognized VAG plug number).
– Robust Ceramic Insulation: Essential for handling the intense heat produced by the S3’s turbocharged engine.
– Performance Enhancement: Designed to restore or improve engine responsiveness and efficiency.

Pros:
– Direct fitment for many recent Audi S3 models
– Coils and plugs are matched for optimal synergy
– Addresses common weak points (old coils and worn plugs) in one go

Cons:
– Requires careful OE number checking to ensure compatibility with your specific S3 model year.

Best for: S3 owners needing a powerful, modern replacement for both ignition coils and spark plugs that matches modern OE specifications.

Expert Opinion: The LFER7BHX plug is a commonly recommended performance option. Pairing it with a new coil pack ensures that any misfire or hesitation issues due to age are fully resolved, providing the clean ignition signal that the engine control unit needs.

Comparison Short Insights

When evaluating the best spark plugs for audi s3, it helps to group them by what they offer beyond just the plug itself.

If pure longevity is your primary concern, the Double Iridium Spark Plug 1675 PFR7S8EG is the clear winner. Its construction guarantees the longest service interval, making it perfect for the non-tuned, daily driver S3.

For those running tuned or high-performance setups (Stage 1 or higher), focusing on plugs with robust heat resistance, like the Iridium Platinum blend (94833 or A-Premium), is safer. These materials handle the increased cylinder pressure better than standard copper or single platinum plugs.

The most compelling value proposition comes from the packages that include coils. If your S3 has over 60,000 miles, investing in the BDFHYK Ignition Coil Pack and Iridium Spark Plugs (XP5325 or LFER7BHX) kits is highly recommended. Worn coils often cause misfires long before the plugs fail, and replacing both ensures peak ignition reliability. Always confirm the specific OE part numbers for the coils and plugs against your S3’s model year before purchasing a kit.

Final Verdict: Choosing Your Spark Plug

Making the final decision on the best spark plugs for audi s3 depends heavily on your driving style and the state of your engine.

For The Daily Driver (Stock to Mild Stage 1): We recommend the Double Iridium Spark Plug 1675 PFR7S8EG. It offers maximum durability, fantastic service life, and OE-level performance without overspending.

For The Enthusiast (Reliable Performance Upgrade): The BDFHYK 94833 Platinum Iridium Spark Plugs offer a great balance of improved throttle response and longevity, perfect for the driver who wants a noticeable upgrade from standard plugs.

The Smart Upgrade for Aging Engines: If you’re approaching 70,000+ miles and haven’t replaced your ignition coils, the BDFHYK Ignition Coil Pack UF716 and Iridium Spark Plugs LFER7BHX Set offers the most comprehensive reliability upgrade by addressing both common ignition failure points simultaneously.

Best Spark Plugs For Audi S3 FAQ

What are the signs that my Audi S3 needs new spark plugs?

Common indicators that your S3 needs new plugs include difficulty starting the car (especially when cold), rough idling, decreased fuel economy, slow or poor acceleration, and engine misfires (often felt as hesitation or jerking, sometimes accompanied by a Check Engine Light). If you run a tuned S3, you might experience misfires under heavy boost well before the standard replacement interval.

What is the recommended service interval for best spark plugs for audi s3?

For stock or lightly tuned Audi S3 models, the service interval is generally between 40,000 and 60,000 miles (60,000 to 100,000 km) for long-life iridium plugs. However, if your S3 is heavily tuned (Stage 2+), it is highly recommended to inspect or replace spark plugs every 10,000 to 15,000 miles (16,000 to 25,000 km), as the increased heat and pressure wear them out much faster.

Should I choose Iridium or Platinum spark plugs for my turbocharged S3?

For turbocharged engines like the S3, Iridium plugs are superior. Iridium has a much higher melting point and is incredibly hard, allowing for a finer, more durable center electrode. This provides a consistent, robust spark, even under the high cylinder temperatures and pressures generated by boost. Platinum is durable but typically used in conjunction with iridium (Iridium-Platinum composite) for best results in performance applications.

What gap setting should I use for my best spark plugs for audi s3?

The correct gap setting depends heavily on your tune. For a stock or Stage 1 S3, the OEM-recommended gap (usually around 0.028″ or 0.7mm) is generally safe. However, if you are running a high-boost tune (Stage 2 or above), you often need to decrease the gap to prevent spark blowout. Common recommendations for tuned S3s range from 0.024″ to 0.026″ (0.6mm to 0.66mm). Always consult your tuner for their specific plug and gap recommendation.

Are coil packs necessary when replacing the best spark plugs for audi s3?

While not strictly necessary if your coils are new, it is highly recommended if your S3 coil packs have been in service for over 60,000 miles. Aging coils can weaken, leading to intermittent misfires even with new spark plugs installed. Replacing both the coil packs and spark plugs simultaneously ensures the entire ignition system is optimized for performance and reliability.

Can using the wrong heat range spark plug damage my Audi S3 engine?

Yes, using the wrong heat range can be detrimental. A plug that is too “hot” (retains too much heat) can lead to pre-ignition or detonation, which can severely damage pistons and cylinder walls. A plug that is too “cold” (dissipates heat too quickly) can lead to fouling, causing misfires and poor performance. Always ensure the plug you choose matches the heat range recommended for your engine’s tune level.