2017 Lexus RX350 Won't Start

Resolve Starting Issues for Your 2017 Lexus RX350

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Reviewed by
Aisha
Written by RepairPal Car Genius
Updated January 14, 2025
0%
38% chance it's the
Battery
0%
27% chance it's the
Alternator
0%
20% chance it's the
Starter
0%
15% chance it's
Something else
The most common reasons a 2017 Lexus RX350 won't start are a dead battery, an alternator problem, or failed starter.
  • Battery: A weak or failing battery can result in difficulty starting the engine and electrical system malfunctions.
  • Alternator: A failing alternator can result in insufficient electrical power, leading to battery drain and electrical system malfunctions.
  • Starter: A faulty starter motor or a weak battery can prevent the engine from cranking properly, leading to starting issues.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

What are the initial diagnostic steps to take for a 2017 Lexus RX350 that won't start?

When your 2017 Lexus RX350 refuses to start, the first step is to check the battery, as a weak or dead battery is often the primary culprit behind starting issues. Ensure that the battery terminals are clean and securely connected, and consider testing the battery's voltage if you have the tools available. Next, inspect the key fob to confirm it is functioning properly; a malfunctioning key fob can prevent the vehicle from recognizing the key and starting. Additionally, verify that there is sufficient fuel in the tank, as running out of gas can lead to starting problems. Pay attention to any warning lights on the dashboard, as these can provide valuable clues about underlying issues. If the battery appears to be the problem, attempting to jump-start the vehicle can help determine if the battery is indeed the issue. Finally, if the engine cranks but does not start, the starter motor may need to be examined, as it could be failing. By systematically following these diagnostic steps, you can effectively narrow down the potential causes of your Lexus RX350's starting issues and take the necessary actions to resolve them.

What are the common problems that could cause a 2017 Lexus RX350 to not start?

When troubleshooting starting issues with a 2017 Lexus RX350, it's essential to consider several common problems that could be at play. A dead battery is often the first suspect, as it can result from age, extreme weather conditions, or simply leaving the lights on. If the battery is functioning, the next component to check is the starter motor; a faulty starter can prevent the engine from turning over. Fuel delivery issues, such as a clogged fuel filter or a malfunctioning fuel pump, can also hinder the starting process. Additionally, a malfunctioning ignition switch may disrupt the electrical system, preventing the car from starting. Worn or faulty spark plugs can lead to ignition problems, making it difficult for the engine to start. It's also important to examine the ignition system for issues like a faulty ignition coil or distributor. Lastly, if the vehicle's security system is malfunctioning, it may not recognize the key, further complicating the starting process. By systematically checking these components, you can identify the root cause of the starting issue and take appropriate action.

How urgent is it to address the starting issue in a 2017 Lexus RX350?

When dealing with a starting issue in a 2017 Lexus RX350, the urgency of addressing the problem cannot be overstated. If the vehicle fails to start completely, immediate action is necessary to prevent being stranded and to avoid further damage to the engine or electrical system. Warning lights on the dashboard serve as critical indicators of underlying issues; ignoring these signals can lead to safety hazards and costly repairs. Intermittent starting problems, while seemingly minor, can escalate into more severe complications if left unchecked, making it essential to investigate them promptly. Additionally, any unusual sounds or smells during the starting process should raise red flags, as they may indicate mechanical failures that could compromise safety. Regular maintenance plays a vital role in vehicle reliability, and if the RX350 is overdue for service, addressing starting issues quickly can help avert more serious problems in the future. In summary, prioritizing the resolution of starting issues is crucial for ensuring the safety and longevity of your Lexus RX350.

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