What Is the Part Number for RS7 Spark Plugs?

The commonly used spark plugs for the Audi RS7 are Bosch and NGK units, with widely referenced part numbers including Bosch FR7KPP332S (often superseded) and NGK plugs such as NGK PFR8S8EG or NGK SILFER8A8G, depending on engine generation and model year. However, the exact part number is not one-size-fits-all: it changes with the RS7’s model year, engine code, and whether the car is stock or tuned, so owners should always confirm via VIN or official catalogs.

Why There Isn’t Just One “RS7 Spark Plug” Part Number

The Audi RS7 has been produced in multiple generations and model years, with mechanical revisions, emissions changes, and software updates that can affect which spark plug heat range and design are specified. As a result, different original equipment (OE) or OE-equivalent part numbers are used. This means that asking for “the” RS7 spark plug part number is incomplete without more detail about the car itself.

Typical OEM and OE‑Equivalent RS7 Spark Plug Part Numbers

Below are some of the most commonly encountered spark plug part numbers for Audi RS7 models in North America and Europe, based on public catalog data and enthusiast/parts references. Exact applicability may vary by region and engine code, so they should be treated as guidance rather than a VIN-verified prescription.

Audi RS7 (C7 / C7.5, 4.0 TFSI V8, approx. 2013–2018)

For the first-generation RS7 (C7/C7.5), the car uses Audi/VW-branded spark plugs that are typically manufactured by Bosch or NGK. Here are part numbers frequently associated with this generation.

• Audi/VW OE Number (commonly referenced): 06K 905 601 (may appear with additional suffix letters in updated revisions)
• BOSCH (typical OE-equivalent): FR7KPP332S (sometimes superseded by updated Bosch numbers in parts catalogs)
• NGK (often used and cross‑referenced): PFR8S8EG
• Heat range: “8” in NGK numbering indicates a colder plug appropriate for high-output turbocharged engines such as the 4.0 TFSI

These part numbers are frequently cited for stock C7/C7.5 RS7 models, but Audi may supersede plug references over time, and tuned engines sometimes use an even colder plug by choice rather than factory specification.

Audi RS7 (C8, 4.0 TFSI V8, approx. 2020–present)

The second-generation RS7 (C8) uses an evolved version of the 4.0 TFSI engine with 48V mild-hybrid technology and further refinements. This has led to updated plug specifications and part numbers. Public catalog and tuning-community references frequently list the following NGK options.

• NGK OE-style plug (commonly cited): SILFER8A8G
• NGK alternative / performance-focused (in some catalogs and tuning setups): SILZKBR8D8S (used in various 4.0T and high-output VAG applications)
• Heat range: Again generally in the “8” cold range for high-boost turbo V8s

While these NGK references are widely used for the C8 RS7, Audi’s own OE part number will often appear as a 10- or 11-character VW/Audi code (e.g., “06K…” or similar family codes), which then cross-reference back to NGK or Bosch manufacturing numbers.

How to Identify the Correct RS7 Spark Plug for Your Car

Because plug choice can vary by year, region, and even production batch, relying solely on generic RS7 information can lead to errors. The following steps provide a more precise way to identify the correct part number for your specific vehicle.

1. Use the VIN in an official parts catalog: Supply your Vehicle Identification Number (VIN) to an Audi dealer or use an official or licensed online parts catalog; it will return the exact current OE plug part number.
2. Check the engine code: Audi RS7 models use 4.0 TFSI engines with codes such as “CRDB,” “CWU,” or updated codes in the C8; parts catalogs are keyed to those codes.
3. Look for supersession notes: Audi frequently supersedes plug numbers to updated versions with minor design changes; the catalog will indicate if your original part number has been replaced.
4. Match cross‑references carefully: When buying Bosch or NGK plugs, use the OE number to find the manufacturer’s exact equivalent rather than guessing by thread size alone.
5. Consider tuning status: Tuned cars that run higher boost may use a one-step-colder plug (still in the same physical family) based on tuner recommendations.

By following these steps, RS7 owners ensure they purchase plugs that match both factory specifications and any performance modifications, rather than relying on a single generic part number.

Factors That Influence RS7 Spark Plug Selection

Beyond the basic question of “which part number,” several technical considerations affect why a particular plug is specified or recommended for the RS7 platform.

• Heat range: High-output turbocharged engines need colder plugs to manage combustion temperatures and prevent pre-ignition.
• Electrode material: Platinum or iridium tips, as used on Bosch and NGK plugs above, offer longer service life and consistent spark under high pressure.
• Gap specification: Audi typically specifies a preset gap; owners should verify the gap is within the manufacturer’s recommended range and avoid excessive regapping of fine-wire plugs.
• Service interval: RS7 spark plugs are often replaced around 30,000–40,000 miles (or earlier on tuned cars) despite their long-life design due to the stress of high boost and heat.
• Fuel and usage pattern: Frequent track use, high-load driving, or poor fuel quality can all justify more frequent inspection and replacement.

These factors explain why RS7 owners and tuners sometimes deviate from the exact factory plug to an alternative part number in the same family that better suits their driving or tuning profile.

Summary

The most commonly referenced RS7 spark plug part numbers include Bosch FR7KPP332S and NGK PFR8S8EG for the first-generation (C7/C7.5) RS7 and NGK SILFER8A8G (and related NGK codes) for the second-generation (C8) RS7, with Audi’s own OE numbers (such as the 06K 905 601 family) cross‑linking to these plugs. However, exact specification depends on model year, engine code, region, and whether the vehicle is stock or tuned. To obtain the correct, up-to-date part number for an RS7, owners should always confirm via the VIN in an official Audi parts catalog or with a dealer, using those results to guide any Bosch or NGK cross‑reference.