Acura CL Ignition Coil Guide (1997-2003): Symptoms, Brands, and Replacement
Solve engine misfires and poor performance by choosing the right replacement ignition coil for your specific Acura CL.
- First, confirm your model year: 1997-1999 models use one single distributor coil, while 2001-2003 models use six individual coil-on-plug units.
- For 2001-2003 V6 models, consider replacing all six coils at once if they are high-mileage originals to prevent future failures.
- Top-tier brands like Hitachi, Denso, and Delphi offer the best reliability and are often original equipment suppliers.
- If you have a V6 with persistent misfire codes after replacing coils, investigate clogged EGR ports, a common issue on these engines.
First vs. Second Generation: A Critical Difference
Before buying an ignition coil for your Acura CL, you must know which generation you have. The ignition systems are not interchangeable.
- 1997-1999 Acura CL (First Generation): These models, with either the 4-cylinder or 3.0L V6 engine, use a distributor-based ignition system. This means the car has only one external ignition coil. This single coil sends high voltage to a distributor, which then routes the spark to the correct cylinder through spark plug wires.
- 2001-2003 Acura CL (Second Generation): These models, with the 3.2L V6 engine, use a modern Coil-on-Plug (COP) system. This system has six individual ignition coils, one for each spark plug. This design eliminates the distributor and spark plug wires, providing a more direct and efficient spark.
Common Symptoms of a Failing Ignition Coil
A bad ignition coil will cause noticeable engine problems. The symptoms are similar for both ignition system types.
- Check Engine Light: This is often the first warning. The system will detect a misfire and trigger a code, such as P0300 (random misfire) or P0301-P0306 for a specific cylinder.
- Engine Misfire or Stumble: The engine may shake, hesitate, or shudder, especially when you accelerate or when idling. A flashing check engine light indicates a severe misfire that can damage other components.
- Rough Idle: Your car may vibrate or sound uneven when stopped at a light.
- Loss of Power: With one or more cylinders not firing correctly, your CL will feel sluggish and weak.
- Worse Fuel Economy: The engine runs inefficiently as it tries to compensate for the lack of power, burning more fuel in the process.
A Special Note for V6 Owners: Clogged EGR Ports
On the 3.2L V6 engine (2001-2003), it is very common for the EGR (Exhaust Gas Recirculation) ports inside the intake manifold to become clogged with carbon. This can cause the exact same symptoms as a bad ignition coil, including multiple misfire codes (P0301-P0306, P1399). If you have replaced coils and spark plugs but still have a misfire, cleaning the EGR ports is a likely solution.
🎬 See how to clean clogged EGR passages to fix misfires.Choosing the Right Aftermarket Ignition Coil
For a critical part like an ignition coil, brand quality matters. While OEM is an option, many aftermarket brands offer excellent quality, often from the same manufacturers that supply Acura.
Brand Quality Tiers
- Tier 1: OEM-Equivalent Quality: Brands like Hitachi and Denso are often the original equipment manufacturers for Acura. Delphi and NGK are also top-tier choices widely trusted by mechanics and enthusiasts for their reliability and performance. For the 2001-2003 V6, choosing from this tier is highly recommended.
- Tier 2: Trusted Aftermarket: Brands like Standard Ignition (SMP), Spectra, and Beck Arnley have a long history of producing reliable aftermarket parts. They offer a good balance of quality and price and are a solid choice for most repairs.
- Tier 3: Economy Options: Brands such as DriveWire, URO Parts, Walker Products, and others offer a budget-friendly solution. While they can get your car running, forum discussions often warn that cheaper, lesser-known coils may not have the same durability or performance as premium brands, potentially leading to earlier failure.
Pro Tip: Replacing Coils on a 2001-2003 CL
On the Coil-on-Plug system, if one coil fails and the others are original with high mileage (over 100,000 miles), it's wise to replace all six at once. The others are likely near the end of their service life and will probably fail soon, saving you from doing the same job multiple times.
Cost of Replacing an Acura CL Ignition Coil
| Part Type | 1997-1999 (Single Coil) | 2001-2003 (Per Coil) |
|---|---|---|
| New Aftermarket | $23 - $60 | $25 - $95 |
| New OEM | $150 - $225 | $105 - $150 |
| Shop Labor | $50 - $125 | |
Frequently Asked Questions
Is it hard to replace an Acura CL ignition coil?
No, for both generations, this is a very DIY-friendly job. For 2001-2003 models, it involves removing a plastic engine cover and then a single bolt for each coil. For 1997-1999 models, the single coil is easily accessible and held on by a couple of bolts. The entire job can usually be done in under an hour with basic hand tools.
Should I replace my spark plugs at the same time?
Yes, it is highly recommended. A failing ignition coil can damage a spark plug, and worn spark plugs can put extra strain on a new ignition coil, causing it to fail prematurely. Since you are already accessing the area, replacing the plugs adds little extra time or labor.
My 1998 CL stalls. Is it the ignition coil?
While a failing coil can cause stalling, the 1997-1999 CL was subject to a safety recall for a faulty ignition switch, which is a very common cause of stalling. If you experience sudden stalling, investigate the ignition switch in addition to the coil.
How do I find out which cylinder is misfiring on my 2002 CL?
You will need an OBD-II scanner to read the diagnostic trouble code. A code like 'P0304' indicates a misfire on cylinder 4. A simple diagnostic technique is to swap the suspected bad coil with a coil from a known good cylinder. If the misfire code follows the coil to the new cylinder, you have confirmed the coil is faulty.
🎬 Watch: How to diagnose a misfire on your Acura engine.Helpful Videos
Technical Specifications
OEM Part Numbers: 30500-PAA-A01 30520-P8A-A01 30520-P8E-A01 30520-P8F-A01 30520-RCA-A02
System Type: Distributor with single external coil (1997-1999) or Coil-On-Plug (COP) with six individual coils (2001-2003). Voltage: 12V input.
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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.
- Acura CL:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- First vs. Second Generation: A Critical Difference
- Common Symptoms of a Failing Ignition Coil
- A Special Note for V6 Owners: Clogged EGR Ports
- Choosing the Right Aftermarket Ignition Coil
- Brand Quality Tiers
- Pro Tip: Replacing Coils on a 2001-2003 CL
- Cost of Replacing an Acura CL Ignition Coil
- Frequently Asked Questions
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