How many plugs does the Lexus RX 350 have?

The standard Lexus RX 350 uses six spark plugs, one for each cylinder in its 3.5-liter V6 engine.

The RX 350 lineup also includes the hybrid RX 350h, which uses a different engine—typically a 2.5-liter four-cylinder paired with electric motors—and would have a different number of spark plugs (four in the gasoline portion of that engine).

Engine configurations and spark plug counts

Here are the core facts you need to know about plug counts across RX 350 variants and what to expect when servicing them.

• The RX 350 (gasoline) uses a 3.5-liter V6 (engine code 2GR-FE) with six spark plugs—one per cylinder.


• The RX 350h hybrid uses a 2.5-liter inline-four gasoline engine combined with an electric motor; that four-cylinder unit typically has four spark plugs.


• Maintenance intervals for spark plugs vary by plug type (iridium/platinum) and driving conditions; check the owner's manual for the exact recommended service interval for your model/year.

Conclusion: In the gasoline RX 350, you have six spark plugs. If you own or are considering the RX 350h hybrid, expect a four-spark-plug configuration on the gasoline engine portion, along with an additional hybrid system to power the wheels.

Summary

Short answer: the RX 350's standard model uses six spark plugs. Across the RX 350 lineup, plug counts change with the engine type, so always verify for your exact year and trim using official documentation or a Lexus technician.

How much does it cost to replace spark plugs in a Lexus RX350?

The cost to replace spark plugs in a Lexus RX350 can range from approximately $720 to over $1,600, depending on the model year and labor rates. For example, a 2019 model might be on the lower end, while older models could be on the higher end. 
Cost breakdown and factors

• Labor: This is the largest portion of the cost because the RX350's V6 engine requires significant labor to access the spark plugs. It often involves removing the intake plenum, which is time-consuming. 
• Parts: The cost of the spark plugs themselves will vary depending on the brand and type (e.g., OEM iridium plugs). You may also need to purchase new plug seals. 
• Model Year: The specific year of your RX350 can influence the total price. 
• Shop Rates: Labor rates vary by location and the shop you choose, with independent shops or dealerships having different pricing structures. 
• Additional Services: Some quotes may include related services, such as replacing the valve cover gasket. 

What to expect

• Shop/Dealer Price: Expect to pay between $723 and $1,633, with the price varying based on the specific year of your RX350. 
• DIY: If you have the tools and mechanical knowledge, you can potentially lower the cost by performing the work yourself, but it is a complex job on this model. 

Recommendation

• Get quotes from several repair shops or dealerships in your area for your specific model year to get the most accurate price.

What is the most common problem with Lexus RX 350?

The most common problem with the Lexus RX 350 is a massive oil leak, specifically from the VVT-i oil line, which can lead to rapid oil loss and potential engine failure, especially in older models like the 2010. Other frequent issues include faulty rain sensors, especially in newer models, resulting in wipers that malfunction randomly. Older model years (2007 and 2010) also show a tendency for airbag warning lights and transmission problems, while some 2016 models experienced rough shifting and transmission issues.
 
This video discusses the 2013 Lexus RX 350's common problems, including oil leaks and other issues: 55scar PROblemsYouTube · Jun 26, 2022
Engine and oil leaks 

• VVT-i oil line leak: This is a recurring issue, particularly in older models like the 2010, where the oil line can burst, causing significant oil loss and potential engine damage if not addressed immediately. 
• Check Engine light: This can be triggered by various engine issues, including problems with the variable valve timing system. 

Electrical and sensor problems 

• Rain sensor malfunction: Both older and newer models have reported issues with the rain-sensing wipers not functioning correctly or stopping randomly. 
• Airbag warning light: This has been reported across several model years, often linked to codes B0111 and B0116 due to issues like faulty sensors or a depleted airbag backup battery. 
• Infotainment system issues: Problems like malfunctioning touchscreens, unresponsive climate controls, and other glitches have been reported, particularly in recent years. 

Transmission and drivetrain issues

• Rough shifting: Some models, such as the 2016, have been reported to have delayed gear shifts and a lack of smoothness.
• Transmission failure: In the 2016 model year, transmission problems were significant enough to cause concerns about long-term reliability. 

Other potential problems

• Spontaneously shattering sunroofs: Though rare, this has been reported in some model years and is a significant safety concern. 
• Body integrity issues: Some older models, such as the 2010, have experienced body-related issues like rattling doors. 
• Steering mechanism leaks: These can be costly to repair. 

How many cylinders does a Lexus RX 350 have?

A Lexus RX 350 has a four-cylinder engine. Specifically, it is equipped with a turbocharged 2.4-liter, inline four-cylinder engine.
 

• Engine type: The engine is a turbocharged, inline 4-cylinder.
• Engine size: The engine is 2.4 liters.
• Horsepower: It produces 275 horsepower.

How many spark plugs are in a Lexus RX 350?

6 pc NGK Iridium IX Spark Plugs compatible with Lexus RX350 3.5L V6 2007-2015.