Acura RDX owners need to know the importance of spark plug replacement for their vehicle. Spark plugs are essential to your Acura RDX engine, as they help ignite the air and fuel mixture in each cylinder.
Over time, spark plugs can become worn and lose their effectiveness, leading to poor performance or even complete failure. This is why Acura recommends that all Acura RDX spark plugs be replaced at least every 90,000 miles.
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What Spark Plugs Does Acura Use?
| Engine | Spark Plugs | Spark Plug Gap |
|---|---|---|
| 2007-2012 Acura 2.3L K23A1 Turbo | NGK SILKR8A-S, Denso SXU22HCR11S, NGK ILZKR7B11S | 0.032″ (0.81 mm) |
| 2013-2018 Acura 3.5L J35Z2 | NGK ILZKR7B11, Denso SXU22HCR11 | 0.044″ (1.11 mm) |
| 2019-2023 Acura 2.0L K20C4 Turbo | NGK DILKAR8P8SY | 0.030″ (0.76 mm) |
Reading Suggestion: Heat Range Of NGK Spark Plugs
Notice
Acura RDX spark plugs should always be replaced all at once to maintain proper engine balance.
Best Spark Plugs For Acura RDX
You’ll find plenty of available options if you’re looking for the best spark plugs for Acura RDX. Choosing the right ones for your Acura RDX can be difficult, but some tips and tricks will help you make the best decision.
First, it’s essential to consider the material used to make the Acura RDX spark plugs. Some Acura models require specific materials such as platinum or iridium, while others may use an alternative material such as copper. You’ll want to pick a material that is best suited for your Acura RDX model and its particular needs.
2007-2012 Acura RDX 2.3L K23A1 Turbo Spark Plugs
| Info/Engine | 2.3L 4-cyl Engine K23A1 Turbo |
|---|---|
| OEM spark plug gap | 0.032″ (0.81mm) |
| Qty. needed | 4 |
| Change interval | 90,000 miles |
| Best spark plug | NGK 1402 SILKR8A-S Laser Iridium Spark Plug |
| Popular choice | Champion 9409 RER8WMB Iridium Spark Plug |
- Spark plug gap: .031" (0.8mm);
- Change interval: 90,000 miles;
- Longevity: 100,000 miles;
- Center electrode: Iridium;
- Ground electrode: Platinum;
- Hex Size: 5/8" (16mm);
- Fitment: Acura/Honda 2.3L K23A1 Turbo engine.
- Spark plug gap: .033" (0.85mm);
- Change interval: 90,000 miles;
- Longevity: 100,000 miles;
- Center electrode: Iridium;
- Ground electrode: Platinum;
- Heat Range: 8;
- Hex Size: 5/8" (16mm);
- Fitment: 2015-2019 Hyundai Sonata 2.0 engine; Acura/Honda 2.3L K23A1 Turbo engine.
- Spark plug gap: .039" (1.0mm);
- Change interval: 90,000 miles;
- Longevity: 100,000 miles;
- Center electrode: Iridium-Platinum;
- Ground electrode: Platinum;
- Hex Size: 5/8" (16mm);
- Fitment: Acura/Honda 2.3L K23A1 Turbo engine.
2013-2018 Acura RDX 3.5L V6 J35Z2 Spark Plugs
| Info/Engine | 3.5L 6-cyl Engine J35Z2 |
|---|---|
| OEM spark plug gap | 0.044″ (1.11mm) |
| Qty. needed | 6 |
| Change interval | – |
| Best spark plug | NGK 7751 ILZKR7B11 Laser Iridium Spark Plug |
| Popular choice | NGK 93175 LKR7DIX-11S Iridium IX Spark Plug |
- Spark plug gap: .043" (1.1mm);
- Change interval: 80,000 miles;
- Longevity: 80,000-100,000 miles;
- Center electrode: Iridium;
- Ground electrode: Platinum;
- Heat Range: 22;
- Hex Size: 5/8" (16mm);
- Fitment: Acura/Honda 3.5L V6 J35Z2 engine; Hyundai 3.5L V6 engine; Hyundai 3.3 V6 engine.
- Extended metal shell
- Price
- Spark plug gap: .043" (1.1mm);
- Change interval: 90,000 miles;
- Longevity: 100,000 miles;
- Center electrode: Iridium;
- Ground electrode: Platinum;
- Heat Range: 7;
- Hex Size: 5/8" (16mm);
- Fitment: Acura/Honda 3.5L V6 J35Z2 engine.
- Spark plug gap: .043" (1.1mm);
- Change interval: 50,000 miles;
- Longevity: 50,000 miles;
- Center electrode: Iridium;
- Ground electrode: Nickel;
- Heat Range: 7;
- Hex Size: 5/8" (16mm);
- Fitment: Acura/Honda 3.5L V6 J35Z2 engine; Hyundai 3.3 V6 engine.
- Special Gasket
- Price
- Longevity
2019-2023 Acura RDX 2.0L K20C4 Spark Plugs
- Spark plug gap: .039" (1.0mm);
- Change interval: 90,000 miles;
- Longevity: 100,000 miles;
- Center electrode: Iridium-Platinum;
- Ground electrode: Platinum;
- Heat Range: 4;
- Hex Size: 9/16" (14mm);
- Fitment: Acura/Honda 2.0L K20C4 engine.
Modern spark plugs are made of iridium, do not require gaping, and can survive 100,000 miles with little fuss. That being said, they still might fail. The good news is that they are inexpensive if you decide to replace them.
Bad spark plugs can cause a variety of issues with your Acura RDX. Bad spark plug symptoms might be subtle or obvious. The basic design and function of the spark plug have not altered significantly in the last century. They sit on top of the combustion chamber and ignite the air/fuel mixture, which starts the engine’s power stroke.
When you ask your RDX for more power, the fuel and ignition systems respond. If acceleration has decreased, it should be apparent. The fewer cylinders that your engine contains, the greater the effect of one cylinder failing to fire properly. If you have any bad spark plugs, it will lessen the RDX’s acceleration.
The more inefficient your engine’s combustion is, the more fuel will be lost. As a result, fuel efficiency will deteriorate. When you bring your car in for an oil change due to decreased gas mileage, a mechanic will look first at the spark plugs (and ignition system in general).
Reading Suggestion: 6 Causes Of Knocking Sound From The Engine
When Should I Replace Spark Plugs In My Acura RDX?
If you see Code 4 on Maintenance Minder – it’s time to replace spark plugs.
Acura recommends that Acura RDX owners replace their spark plugs at least every 90,000 miles. However, it’s essential to keep an eye on the condition of your Acura’s spark plugs and replace them if they become worn or damaged.
It’s also important to remember that Acura RDX spark plugs should always be replaced all at once in order to maintain proper engine balance and optimal performance. Therefore, you’ll want to purchase a complete set for your Acura model when replacing Acura RDX spark plugs.
What Are Signs You Need New Spark Plugs?
If you notice any of the following in your Acura RDX, it may be time to replace the spark plugs:
- Poor engine performance
- Engine knocking
- Reduced fuel efficiency
- Rough idle
- Engine misfire or hesitation when accelerating
