Essential Guide to Spark Plugs for the 1993-2002 Nissan Altima
Keep your Altima's KA24DE engine running strong by choosing the right spark plugs for the job.
- The 1993-2002 Altima's KA24DE engine is easy to service; replacing spark plugs is a simple DIY job.
- NGK and Denso are the OEM-equivalent brands and are highly recommended by owners to ensure performance and avoid issues.
- Always check the spark plug gap before installation; it should be set to 0.044 inches.
- Symptoms like a rough idle, poor acceleration, and a check engine light often point to worn spark plugs.
Signs of Failing Spark Plugs
When your Altima's spark plugs wear out, your car will let you know. Worn plugs can't create a strong enough spark, leading to incomplete combustion. You might notice one or more of these common symptoms:
🎬 Watch: A visual guide to identifying bad spark plug symptoms.- Rough Idling: Your engine may shake or vibrate more than usual when you're stopped. This is often caused by an engine misfire due to a bad plug.
- Poor Acceleration: If your Altima feels sluggish or slow to respond when you press the gas, worn plugs could be the cause.
- Reduced Fuel Economy: When fuel isn't burned completely, your gas mileage will suffer.
- Engine Misfires: You might feel a jerking or stumbling sensation while driving, sometimes accompanied by a popping sound from the engine.
- Difficulty Starting: Weak sparks make it harder for the engine to turn over, especially in cold weather.
- Check Engine Light: A flashing or steady Check Engine Light can be triggered by misfires caused by faulty spark plugs. Common codes include P0300 (random misfire) or P0301-P0304 (cylinder-specific misfires).
Choosing the Right Aftermarket Spark Plugs
For the 1993-2002 Nissan Altima, you have several good aftermarket options. Nissan originally used NGK or Denso plugs, and sticking with these brands is a safe bet for quality and fit. However, other brands also offer compatible plugs at various price points.
Brand Quality Tiers
| Tier | Brands | Materials & Notes |
|---|---|---|
| OEM Equivalent / Premium | NGK, Denso | These are the brands Nissan trusted for original installation. Using their Iridium or Platinum plugs often provides the best performance and longest life, typically lasting up to 100,000 miles. Many Altima owners strongly recommend sticking with NGK to avoid issues. |
| Quality Aftermarket | Bosch, Champion, Autolite | These brands offer a range of plugs, from basic copper to long-life iridium. While some users have reported issues with Bosch in Nissan engines, others find them to be a good value. Champion and Autolite are well-known names that provide reliable, budget-friendly options. |
| Budget-Friendly | Accel | These plugs can get the job done at a lower cost, but may not last as long or perform as consistently as premium options. They are a viable choice if you are on a tight budget. |
Pro Tip: The 1993-2002 Altima's KA24DE engine is not overly sensitive, but many experienced owners and mechanics insist on using NGK plugs to guarantee compatibility and avoid potential misfire issues. 🎬 See this walkthrough for replacing plugs and wires on the KA24DE. While iridium plugs offer the longest life, standard platinum or even copper plugs will work well if changed more frequently.
Known Issues, Recalls, and TSBs
Searches for recalls and Technical Service Bulletins (TSBs) for the 1993-2002 Nissan Altima did not reveal any specific issues related to the spark plugs themselves. Recalls found were for much newer Altima models and concerned unrelated components like hood latches or engine control modules. The reliability of this Altima generation means there are few widespread, documented problems with its ignition system.
Frequently Asked Questions (FAQ)
How often should I change my Altima's spark plugs?
The replacement interval depends on the type of spark plug. Standard copper plugs should be changed every 30,000 miles. Platinum and Iridium plugs can last much longer, often between 60,000 and 100,000 miles. Always check the manufacturer's recommendation for the specific plugs you buy.
What is the correct spark plug gap for a 1993-2002 Altima?
The recommended spark plug gap is typically 0.044 inches (1.1 mm). While most plugs come pre-gapped, it is crucial to check the gap with a feeler gauge or gapping tool before installation and adjust if necessary.
Can I use iridium spark plugs in my older Altima?
Yes, you can use iridium spark plugs. Brands like NGK and Denso offer iridium options that are compatible with the KA24DE engine. They provide a longer service life and excellent performance, making them a popular upgrade.
Do I need special tools to change the spark plugs?
The job is straightforward and requires basic tools. You will need a ratchet, an extension, a 10mm socket (for the coil bolts), and a 5/8-inch spark plug socket. 🎬 Watch: Step-by-step spark plug and wire replacement for 1997-2001 models. A torque wrench is recommended to tighten the new plugs to the correct specification (usually 18-22 ft-lbs).
Helpful Videos
Technical Specifications
OEM Part Numbers: 22401-5M015 22401-2J200
Engine: 2.4L KA24DE 4-Cylinder; Spark Plug Gap: 0.044 in (1.1mm); Socket Size: 5/8 inch; Torque Spec: 18-22 ft-lbs
We Have This Part in Stock
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.
- Nissan Altima: