A Guide to Spark Plugs for the 2005-2011 BMW M5 (E60)
Keep your high-revving S85 V10 engine firing precisely with the correct set of new spark plugs.
- Only use NGK LKR8AP spark plugs for the 2005-2011 M5; they are the OEM part and ensure proper engine performance.
- Avoid using Champion or Autolite brands in this specific high-performance engine, as they are known to cause issues.
- Replace all 10 spark plugs every 37,000 miles as recommended by BMW to prevent misfires and maintain engine health.
- DIY replacement is possible, but be prepared with special tools (universal joints, extensions) for the two rearmost plugs near the firewall.
Symptoms of Failing Spark Plugs
The S85 engine is sensitive to ignition health. When spark plugs wear out, you'll likely notice. The service interval recommended by BMW is every 37,000 miles. Ignoring this can lead to problems that are hard to miss.
- Engine Misfires: The most common symptom. You may feel a hesitation or stumble during acceleration. The Check Engine Light may flash or stay on, often with codes from P0301 to P0310. 🎬 Watch this guide to troubleshoot and fix V10 engine misfires.
- Rough Idle: Your M5 may vibrate or run unevenly when stopped at a light.
- Reduced Power and Fuel Economy: Worn plugs can't burn fuel efficiently, leading to sluggish performance and more trips to the gas station. 🎬 See how to diagnose engine faults and reduced power issues.
- Difficulty Starting: Weak or inconsistent sparks can make it harder for the engine to start, especially when cold.
Choosing the Right Aftermarket Spark Plug
For a specialized engine like the S85, spark plug choice is not the place to experiment or cut corners. While several brands are available, owner experiences and expert recommendations point to one clear choice.
Tier 1: OEM-Equivalent (Recommended)
NGK: NGK is the Original Equipment Manufacturer (OEM) for the 2005-2011 M5 spark plugs. The specific model is the NGK LKR8AP. Choosing the aftermarket NGK LKR8AP gets you the exact same part that came in your car from the factory, without the BMW logo and dealer markup. Given the sensitive nature of the S85 engine, sticking with the OEM-spec plug is the most reliable way to ensure proper performance and avoid issues.
Tier 2: Economy Brands (Use with Caution)
Autolite & Champion: While these brands are available and may offer a lower price, they are not recommended for the E60 M5. Forum discussions among M5 owners consistently warn against using Autolite or Champion plugs, citing experiences with misfires, poor performance, and questionable quality control compared to NGK. For a high-performance, high-strung engine like the S85, the potential savings are not worth the risk of performance issues or engine trouble.
Aftermarket Spark Plug Cost (2005-2011 BMW M5)
| Part | Tier | Average Cost (per plug) |
|---|---|---|
| NGK LKR8AP | Tier 1 (OEM-Equivalent) | $11 - $21 |
| Champion / Autolite | Tier 2 (Economy) | $4 - $10 |
Known Issues, Recalls, or TSBs
Searches of the National Highway Traffic Safety Administration (NHTSA) database and technical service bulletins (TSBs) did not reveal any recalls or service actions specifically for spark plug issues on the 2005-2011 BMW M5. However, a recall was issued for many 2004-2010 5-Series models for a battery cable in the trunk that could pose a fire risk.
A Note on Installation
Replacing the spark plugs on the S85 V10 is a manageable DIY job for those with some experience. However, the two rearmost cylinders (5 and 10) are located deep against the firewall and are notoriously difficult to access. You will need a specific combination of a thin-wall 5/8" spark plug socket, a universal joint, and various lengths of extensions to reach them. While the front eight are straightforward, be prepared for a challenge with the back two.
🎬 Follow this step-by-step DIY video for a successful plug replacement.Frequently Asked Questions (FAQ)
How often do I need to change the spark plugs on my E60 M5?
BMW's recommended service interval for the S85 engine is every 37,000 miles. Your car's iDrive service menu also tracks this and will alert you when service is due.
Is an aftermarket NGK plug really the same as the Genuine BMW part?
Yes. NGK is the original supplier to BMW for this part. The NGK LKR8AP is the same plug you would get from a BMW dealer, just in different packaging and at a lower cost.
Can I use Champion or Autolite plugs to save money?
It is strongly advised not to. The overwhelming consensus from BMW M-car specialists and owners is that these brands do not perform as well as the OEM NGK plugs and can cause misfires or other running issues in the S85 engine.
Do I need to gap the new spark plugs?
The recommended NGK LKR8AP plugs typically come pre-gapped from the factory. It is always a good practice to verify the gap with a feeler gauge before installation, but do not adjust an iridium plug with a standard disc-style gapping tool, as it can damage the fine electrode.
Helpful Videos
Technical Specifications
OEM Part Numbers: 12120032273
OEM Brand: NGK. OEM Part Name: LKR8AP. Quantity Required: 10.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- BMW M5:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Symptoms of Failing Spark Plugs
- Choosing the Right Aftermarket Spark Plug
- Tier 1: OEM-Equivalent (Recommended)
- Tier 2: Economy Brands (Use with Caution)
- Aftermarket Spark Plug Cost (2005-2011 BMW M5)
- Known Issues, Recalls, or TSBs
- A Note on Installation
- Frequently Asked Questions (FAQ)
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