Chrysler Laser Spark Plug Guide: Choosing the Right Plugs for 1984-1986
Get the right spark plugs for your 2.2L or 2.2L Turbo engine and avoid common issues.
- For the 1984-1986 Chrysler Laser, stick with standard copper-core spark plugs from brands like Champion, NGK, or Autolite for the best performance and value.
- Do not use expensive iridium or platinum plugs; they offer no real benefit for this engine and may cause issues, especially in the turbo model.
- Always verify the spark plug gap is set to 0.035 inches with a tool before installation, even if the plugs are sold as "pre-gapped".
- No specific recalls or TSBs exist for spark plugs; replacement is a normal wear-and-tear maintenance item to be performed every 20,000-30,000 miles.
Choosing the Right Aftermarket Spark Plug
For a 1984-1986 Chrysler Laser, the original ignition system was designed for a specific type of spark plug. While modern, expensive plugs are available, they are not the best choice for these cars. The simple and robust ignition system in your Laser performs best with the type of plug it was designed for: standard copper-core.
While original Mopar-branded plugs from the 1980s are no longer available, today's aftermarket provides excellent, high-quality replacements. There is no need to hunt for New Old Stock (NOS) parts, as modern manufacturing from trusted brands meets or exceeds original quality.
Don't Waste Money on Platinum or Iridium
For your Laser's 2.2L or 2.2L Turbo engine, expensive platinum or iridium spark plugs are not a necessary upgrade. They will not provide a noticeable improvement in performance or fuel economy to justify the higher cost. In fact, some owners have reported issues when using platinum plugs in the turbo engines. The best strategy is to use affordable copper-core plugs and replace them more frequently, about every 20,000 to 30,000 miles.
Aftermarket Spark Plug Brand Tiers
Not all spark plugs are created equal. Here’s a breakdown of the available brands for your Chrysler Laser, based on reputation and suitability for its 1980s-era engine.
Tier 1: Recommended OEM-Style
These brands offer standard copper-core plugs that are very similar to what Chrysler used at the factory. They provide excellent, reliable performance and are the top choice for most Laser owners.
- Champion: Champion was the frequent Original Equipment (OE) supplier for Chrysler during this period. Using their standard Copper Plus plugs is a reliable and authentic choice for your engine.
- NGK: NGK is a top-tier Japanese brand known for exceptional quality. Their V-Power copper plugs are a highly-regarded option that works very well in these Chrysler engines.
- Autolite: Autolite is another trusted American brand that was also an OE supplier to Chrysler. Their standard copper plugs are a solid, affordable choice.
Tier 2: Quality Alternatives
This brand also produces high-quality plugs that are a good fit for your vehicle.
- Denso: A leading Japanese manufacturer known for OE-quality parts. Their standard copper plugs are an excellent alternative if Champion or NGK are not available.
Tier 3: Use With Caution
This brand has a more mixed reputation for older American engines.
- Bosch: While a major German brand, their plugs can be temperamental in some non-European cars. Specifically for the 2.2L Turbo engine, some mechanics advise against using Bosch Platinum plugs, as they have been known to fail. If choosing Bosch, stick to their standard copper plug offering.
Aftermarket Spark Plug Cost (1984-1986 Chrysler Laser)
| Tier | Brands | Estimated Price (per plug) |
|---|---|---|
| Tier 1 (Recommended) | Champion, NGK, Autolite | $3.23 - $5.50 |
| Tier 2 (Alternative) | Denso | $3.50 - $6.00 |
| Tier 3 (Use With Caution) | Bosch | $3.25 - $7.00 |
| Premium (Not Recommended) | Iridium or Double Platinum Plugs | $8.00 - $16.38+ |
Pricing is based on a range of available aftermarket brands and may vary. Prices as of Q2 2026.
Vehicle-Specific Issues & Recalls
No Recalls or TSBs: There are no specific recalls or Technical Service Bulletins (TSBs) from the NHTSA related to spark plugs for the 1984-1986 Chrysler Laser. All failures are due to normal wear and tear.
Turbo Engine Warning: Multiple owner and mechanic sources suggest avoiding platinum-type spark plugs, particularly from Bosch, on the 2.2L Turbo engine. There are anecdotal reports of the platinum electrodes breaking off, which can cause severe engine damage. Stick with standard copper plugs for the turbo engine.
Frequently Asked Questions (FAQ)
Do I really have to check the spark plug gap?
Yes, absolutely. Even if the box says "pre-gapped," you must verify the gap with a feeler gauge or gapping tool before installation. An incorrect gap is a common cause of misfires, poor performance, and bad fuel economy. The gap for the 2.2L engine should be 0.035 inches. Always verify this spec for your specific engine.
How often should I change the spark plugs on my Laser?
When using the recommended standard copper-core plugs, a good replacement interval is every 20,000 to 30,000 miles. This will keep your engine running at peak performance and efficiency.
What is a spark plug "heat range"?
The heat range refers to how quickly a spark plug transfers heat away from its firing tip. It's a critical specification. Using a plug with the wrong heat range can lead to poor performance, fouling, or even engine damage. When buying aftermarket plugs, it is essential to use the part number specified for your Laser's engine to ensure the heat range is correct.
Should I replace my spark plug wires at the same time?
It's a good idea. Spark plug wires degrade over time, and old wires can cause a weak spark even with new plugs. On a vehicle of this age, if the wires look original or are cracked, it is wise to replace them, along with the distributor cap and rotor, for a complete ignition tune-up.
Technical Specifications
OEM Part Numbers: RN12YC
The most important specification is the spark plug gap, which should be set to 0.035 inches. The recommended plug type is a standard copper-core resistor plug. The Champion OEM part number was likely RN12YC, but always confirm the correct part for your specific engine (2.2L or 2.2L Turbo).
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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.
- Chrysler Laser:
- 🛍️ Shop This Part
- Choosing the Right Aftermarket Spark Plug
- Don't Waste Money on Platinum or Iridium
- Aftermarket Spark Plug Brand Tiers
- Tier 1: Recommended OEM-Style
- Tier 2: Quality Alternatives
- Tier 3: Use With Caution
- Aftermarket Spark Plug Cost (1984-1986 Chrysler Laser)
- Vehicle-Specific Issues & Recalls
- Frequently Asked Questions (FAQ)
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