Audi S5 Won’t Start? Here’s Quick Solutions to Most Common Problems

Introduction

As an experienced auto mechanic with over two decades of hands on experience, I’ve seen plenty of people battling when their Audi S5 Won’t Start. And let’s face it, not being able to start your car when you need to drive is incredibly annoying.

But don’t lose hope, you’ve come to the right place, no need to keep googling searches like “starting problems in Audi“, I got you covered. My name’s Robby, a certified auto mechanic with over two decades of experience, and in this guide, I’ll walk you through the usual causes for why your S5 refuses to start. I’ll cover all the commonplace culprits so you can diagnose what’s going on, plus what to do to fix each particular problem. Drawing on my 20 years of firsthand experience, I’ll provide practical diagnostic pointers to get your Audi S5 fire up and moving ASAP!

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To save you time, this might be the quick solution you need.

An online mechanic can help you solve the issue much faster, and save money doing it.

They help 1000s of people every day in your position, save a lot of time, money and risk getting their vehicle repaired. Having a friendly expert mechanic guiding and advising you every step of the way, is the best thing you can do. You will have your issue fixed faster, and likely cost much less.

Quick Solution Alert! 🚗💡

To save you time, this might be the quick solution you need.

An online mechanic can help you solve the issue much faster, and save money doing it.

They help 1000s of people every day in your position, save a lot of time, money and risk getting their vehicle repaired. Having a friendly expert mechanic guiding and advising you every step of the way, is the best thing you can do. You will have your issue fixed faster, and likely cost much less.

Quick Solution Alert! 🚗💡

You can read on, or get instant help with your issue. We have the best online mechanics, but before asking them, we recommend asking our AI mechanic first as it’s 100% FREE.

9 out of ten times the AI mechanic is able to help you solve the problem for free, and if it’s not, you can chat with a human mechanic on the next page anyway.  Try it for free below. 

Why Won’t My an Audi Start?

Audi S5 wont start

Before we dive into the laundry list of possible faults and fixes, it’s vital to first get on the same page of the core problem. When you climb into your Audi S5 and discover “it won’t start!”, there could be a number of things causing the headaches. Maybe the engine isn’t cranking at all, or possibly it’s cranking but not firing. Or you might hear clicking when you try to start it, but ultimately nothing happens. All these situations can signal different mechanical issues.

Common Reasons Why Your Audi S5 Won’t Start

There are numerous culprits as to why your S5 won’t start up. The usual suspects include a weak or drained battery, faulty alternator, starter motor issues, fuel system snags, plus electrical or wiring defects. Every one of these issues can present differently, needing specific methods of diagnosis and repair to get you back on the open road pronto. All of which, we’ll delve into.

Symptoms of an Audi S5 That Won’t Start

Recognizing these symptoms will lead you to the main cause. Take for example, when you turn the key or press the start button and you hear it turning over yet no start up, it often indicates a problem with either fuel delivery or ignition issues.

Analysis of The Reasons Why Your Audi S5 Won’t Start

The initial move in fixing the no-start hassle is understanding the exact source of the trouble. So let’s explore the most frequent causes of the S5 not starting when you turn the key.

Battery Issues in an Audi S5

car wont start but battery is good
Image Credit: MechanicAnswer.com

In the vast majority of situations, the most typical reason an Audi S5 won’t start comes down to battery troubles. Specifically, a weak or dead battery prevents the engine from turning over. The car’s battery provides the required power to start the engine and activate all your vehicle’s electrical components. Signals of a failing battery include labored or difficult cranking, dim headlights, or a battery alert symbol aglow on the dash. A battery charger can recharge a drained battery if you don’t have the help of another vehicle to jump start it, but do have an electrical socket nearby like at home.  And a portable jump starter lets you charge p the battery without another vehicle, and by the roadside without the need for an electrical socket, so you are never stuck.

Alternator Problems in an Audi S5

car wont start alternator

The Alternator keeps the battery charged by harnessing engine power while driving. A malfunctioning alternator can easily stop your Audi S5 from starting since it fails to recharge the battery, draining it completely so that one day you climb into your ride and it refuses to start up. Clues of a malfunctioning alternator may include a lit up battery or alternator caution light on its dashboard, dull headlights while idling, or a grinding noise from the engine while running.

Starter Motor Failures in an Audi S5

car wont start wont turn over

The starter motor is key to turning over the engine when you attempt to start your Audi. Should the starter fail, the engine can’t crank, keeping your S5 from starting. Listen for clicking sounds when you turn the key or grinding while trying to start, which could indicate starter problems.

Fuel System Issues in an Audi S5

car wont start fuel filter

This isn’t about running out of gas like a silly goose. Rather, it’s issues with the fuel system itself that could leave your S5 unable to start. Your car uses gas uses gas to mix with air and powers the engine. So problems here like a clogged fuel filter or damaged fuel pump relay may mean the engine lacking the fuel it requires for ignition. Fuel injectors can also get clogged over time, so try a fuel injector cleaner like Red Line to clear any blockages and improve starting.

Electrical System or Wiring Problems in an Audi S5

car wont start electrical issue
Image Credit: MechanicAnswer.com

Ok, well yes that image is a joke, but I want to emphasize today’s cars depend greatly on electronics, expanding the number of things that can go wrong. With older cars, common culprits include blown fuses, spark issues, damaged ignition switches, or non-working sensors. Electrical issues and electronics like these may prevent your Audi S5 from starting. Be on the lookout for your car only starting sometimes, warning lights, or failure to crank as indicators pointing to an underlying electrical problem. Diagnosing and repairing these often needs a knowledgeable mechanic near you.

Solutions: Let’s Get Your Audi S5 Starting Again!

If you think you might know what the issue may be, it’s time to figure out the cause of your car’s inability to start up, and then the next step is to try to fix the problem. Here are some tips for typical issues we’ve talked about already:

How to Identify and Fix Battery Issues in an Audi S5

car not starting but battery is fine

If you think a battery issue is to blame for your Audi’s difficulty starting, first check the battery terminals Verify they are corrosion-free, secure, and properly connected. Should you find corrosion or gunk buildup on the terminals, a baking soda and water solution can help clean them.

Once you have checked the battery terminals, you can check to see if the battery is just out of charge, or worse, it’s old and weak, or dead and needs to be replaced. For this, you can charge the battery in a few different ways:

If the battery charges fully and performs as expected, the issue may be resolved. However, replacing the battery will be required if it is old, weak or dead. Otherwise, even sufficiently charging it to start your S5 may only provide temporary relief before it runs out of charge again in the near future. Using a multimeter or OB2 scanner to evaluate the battery’s condition can determine if it’s worth preserving or requires swapping out. Suitable replacement batteries for your specific Audi can be found on Amazon here by entering your vehicle details to filter for the right fit and choosing a highly-rated seller.

Robby Recommends:

Portable Car Battery Jump Starter Charger - NOCO Boost Plus GB40

At Home Battery Charger - YONHAN - Fully Automatic

Jumper Cables by Energizer for Car Battery - Heavy Duty

NOCO Boost Plus GB40 1000A UltraSafe Car Battery Jump Starter

YONHAN Battery Charger Fully-Automatic

Energizer Jumper Cables for Car Battery, Heavy Duty

If charging your S5’s battery fails to solve ongoing issues like frequent draining and recharging even after installing a new battery, an underlying problem likely causes the excessive drain. Professional diagnostic services would then be needed to inspect and identify the root cause. You can also consult a mechanic online through us or obtain an instant quote from a mobile mechanic.

How to Identify and Fix Alternator Problems in an Audi S5

Car wont start replace alternator needed

If you think the alternator is the reason your Audi S5 won’t start, a test can confirm. If you can temporarily get the car running (you may need a jump start), with the engine on, remove the positive battery terminal. It’s probably the alternator if the motor conks out soon after disconnecting the positive lead. However, be cautious this test can be risky and mess up sensitive electronics in your wheels, so it’s best to talk to a pro mechanic in your town or online first since this test risks harming the delicate electronic gizmos in your Audivehicle.

If you figure out that the alternator is the problem, it’s a case of having it replaced. I recommend consulting an online or local mechanic as they will advise you on how difficult the repair is for your specific model, and you can work out if you want to try it yourself, or with the advice of an online mechanic

If you do want to try it yourself or take it to a local garage, you can often buy the replacement parts yourself cheaper than at the garage, but you need to know what to get for your model of Audi S5. You find all the information you need about your specific vehicle by searching online for something like “stolen Audi vin check“, which is a purchasable report, that will give the specs for your vehicle and which parts are compatible, and then you can go get the alternator parts you need. However, an easier option is, Amazon probably has the alternator you need online, at a cheaper price, and their site easily shows which ones will go in your specific car model. Check the Amazon alternator page here

How to Identify and Fix Starter Motor Problems in an Audi S5

starter motor issues in a ford

If you think the starter motor might be causing your Audi S5 to not start up, listen closely for a clicking noise when you turn the ignition key. If present, but the engine does not turn over, the starter motor likely needs replaced. You can take it to a local garage and have them repair it, or repair it yourself with the help and advice from an online mechanic guiding you. 

If you need it, one of the cheapest and easiest places to get a new starter motor, for your exact vehicle model is on the Amazon here.

How to Identify and Solve Fuel System Problems in an Audi S5

clogged fuel filter car wont start

If you suspect a fuel system issue might be to blame for the no-start, tune your ears for the fuel pump hum when you turn the key to “on” before trying to turn over the car. The pump should emit a quiet humming for a few seconds. Should no such quiet hum be audible, the fuel pump could be defective. Difficult starting, stalling, or poor throttle response may also stem from a problematic or clogged fuel filter. Both pump and filter issues normally require a skilled mechanic to inspect and repair them properly, often involving fuel pressure testing and precise diagnostic gear. Later in this article, I detail the best ways to get help from a local Audi mechanic near you. 

How to Repair Electrical or Wiring Problems in an Audi S5

fuses to check when car wont start

If you suspect it’s an electrical circuitry issue, first examine the fuses for the ignition system, and swap out any that have blown. If your S5 starts after this, it was a successful, cheap fix! However, if it still won’t start, even sometimes, the ignition switch itself could be problematic. Dash lights on the dashboard could additionally mean a damaged sensor. These can be intricate issues needing a professional mechanic to identify and properly repair (see below advice on local mechanics).

How to Prevent Starting Issues in an Audi S5

As grandad used to say: “An ounce of prevention is worth a pound of cure”. Here’s how to avoid future issues starting your S5:

Routine Upkeep of Your Audi S5

Regular maintenance on car to prevent starting issues

Routine maintenance is critical to avoiding issues, including oil changes, checking the battery, cleaning terminals, replacing the fuel filter as needed, and having a mechanic inspect the vehicle regularly. If confused about maintenance for your model, ask a mechanic locally or online for clarification.

Drive Your S5 Frequently

drive regular to avoid car troubles

If your Audi S5 happens to sit motionless in the garage or driveway for weeks without being driven, the battery can deplete as it is not being recharged by the engine running, through the alternator. Try your best to drive your vehicle regularly to maintain a charged battery. If you remember you haven’t driven your car in a while, take it for a short drive around town to ensure there is still a charge left.

Note: Letting the battery fully drain is also bad for its longevity, so try to avoid that.

Pay Attention to Warning Signs

Check Engine Control Light on a Vehicle Dashboard

If you notice any irregular things like unusual noises, changes in driving and performance, or warning lights lit up on the dashboard, do not ignore them. These are often early signs of an issue that should be addressed ASAP before they escalate into larger problems later on. Consult with a mechanic locally or online about these problems and get advice on if they require attention.

When to Ask an Audi Mechanic Online

If your schedule is packed, or you gave fixing the no start yourself an honest effort but with no luck, consider consulting an Audi mechanic online. It delivers expert guidance in just minutes from the comfort of home, and is far less expensive than a tow and diagnosis at the local garage.

Benefits of an Online Audi Mechanic

Happy mechanic repairing car looking at camera

By detailing what you’ve already tried and sharing specifics on the no-start issue, online mechanics can then offer a custom action plan to help get your car started again. With so many Audi mechanics available they can help fix nearly any problem, it doesn’t if matter it’s your S5 that’s having issues or an Audi S4 won’t start, the online mechanics can help sort anything in no time. And with many household budgets tighter these days, the convenience and affordability of online mechanics help, keep your wallet happy too.

You can describe the issues you’re having, ask Audi mechanics unlimited questions, and even upload pics and videos so you can show the expert what you mean. You can connect with them via online chat or voice chat, whatever you like. The Audi mechanic will diagnose the issue, advise the top solution for your particular case, and even walk you through simple repairs step-by-step.

Whether you want an expert second opinion or are simply short on time, online repairs assistance is there when you need it. Give it a try – you may be surprised just how easy and stress-free it is.

So feel free to try out our ask a Audi mechanic online free service and see for yourself!

When and How to Get a Local Audi Mechanics Help

automobile mobile mechanic

When your Audi S5 won’t start, and you are unable to repair it yourself, thinking about how to get your vehicle to the garage can be a nightmare. There are options like roadside services, that come to you and can provide simple fixes to get your car moving enough again, so you can get it to a mechanic garage for proper repairs. You can also use a towing service, but these can be costly, easily into the hundreds of dollars. A much better option is the use of a mobile mechanic, who will come to you at your home, place of work, or by the roadside, and carry out repairs there and then for you, so you can get your S5 started again ASAP.

So if you think a mobile mechanic is the best solution for you, instead of searching on Google something like  “mobile car mechanic service“, the best in the USA that also covers most towns is YourMechanicI have personally recommended them to countless people across the country and they always have a great experience.

Reasons I recommend them:

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If you would like to know more, the process to use them is this.

  1. Visit their official website here: YourMechanic
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Super easy, super reliable, super convenient, and highly recommended.

Conclusion

In short, when your Audi S5 won’t start, it can be a major inconvenience. However, grasping what might be causing the issues, being able to troubleshoot them, and knowing what steps are required in each case, and where to find help if needed, will be a huge help. Keep in mind that regular maintenance is vital to preventing most vehicle issues.

Frequently Asked Questions (FAQs) When a Audi S5 Won’t Start

Audi S5 won’t start but lights come on?

If your Audi S5‘s lights turn on but it still won’t start, the issue is likely not related to the battery. More than likely there is a problem with the starter motor. Investigate if you hear any clicking sounds when attempting to crank the key. If so, the starter motor is trying to engage but failing. Get a mechanic check over the starter motor – it may need to be repaired or replaced.

Audi S5 won’t start but has power?

When your Audi S5 has power (lights, radio etc work) but does not start up, there may be a fuel delivery problem. Issues like a faulty fuel pump relay could stop fuel getting to the engine. Without enough fuel, combustion can’t happen and the engine won’t start. Listen near the back seat when turning the key – you should hear the fuel pump prime for a few seconds. If not, have a mechanic check the fuel system.

Audi S5 won’t start but battery is good?

If your Audi S5‘s battery tests fine and is fully charged, but the car still refuses to start, the underlying cause is likely electrical. Potential culprits include a bad ignition switch, broken sensor, or wiring problems. As electrical issues can be tricky, diagnosis by a professional mechanic is best. They can correctly pinpoint the specific electrical fault and have it repaired.

Audi S5 won’t start just clicking?

When you turn the key and just hear clicking but the engine doesn’t crank, the most common cause is a faulty starter motor. The click comes from the starter solenoid attempting to activate the starter motor, but the motor itself fails to crank the engine. As the starter motor needs physical fixing or swapping out, seek help from a reliable mechanic to get your Audi S5 running again.

What if my Audi S5 won’t start up?

First things first, take a deep breath and don’t panic. Check for any odd noises, flashing lights, or changes in how it runs that could point to the issue. Chances are the culprit is one of the common problems we will talk about here. If you still can’t identify the exact issue, you’ll have to ask for help from a trusted Audi mechanic locally or online.

Determine if my Audi S5 won’t start because of a bad battery?

Signs that your Audi’s battery is the issue include, a slow cranking engine, dim headlights, and battery alerts lighting up on the dash. Also check that the battery terminals are clean, corrosion-free, and tightly fastened. If your battery is older it’s probably best to just replace it fully.

How to prevent my Audi S5 from failing to start in the future?

To prevent this frustration from reoccuring, scheduled upkeep is crucial. This includes oil changes, checking the battery and scrubbing its terminals, replacing the fuel filter when required, and getting your Audi S5 inspected by a mechanic on a regular basis. Additionally, remember to drive the car regularly so the battery stays charged.

Can I consult an online mechanic if my Audi S5 fails to start up?

Yes, you can. An online mechanic service like ours can offer immediate professional Audi mechanic help and recommendations, without you having to leave your residence. If your vehicle fails to start and is immobile in the driveway, this is particularly beneficial.

How can websites like MechanicAnswer.com provide assistance if my Audi S5 fails to start?

We connect you with licensed Audi specialists who can provide suggestions specific to your individual predicament. You can inform them about your vehicle issues, ask unlimited questions as needed, upload videos or pictures so you can comprehensively demonstrate the problem. The specialist auto mechanic will be able to assist, diagnose the fault, and propose the ideal plan of action and talk you through it.

Interesting Audi S5 Facts

Did you know that the Audi S5 is equipped with a turbocharged V6 engine that produces an impressive 349 horsepower and 369 lb-ft of torque? That’s enough power to go from 0 to 60 mph in just 4.4 seconds! And get this – the S5 also comes with a sport-tuned suspension and a quattro all-wheel drive system, making it a blast to drive on both city streets and winding country roads. Plus, with its sleek and stylish exterior design, the S5 is sure to turn heads wherever you go. It’s no wonder you’re itching to get behind the wheel and experience the thrill of driving this incredible machine!

Which Mechanic Suits You?

  1. Chat with an Online Mechanic to get instant, unlimited help and advice for 1 full week, for just $5.
  2. Get in-person help from a Mobile Mechanic Near You. They will come to you and fix your vehicle at a time that suits you. If there are none near you, you will be redirected to the online mechanic.

Which Mechanic Suits You?

  1. Chat with an Online Mechanic to get instant, unlimited help and advice for 1 full week, for just £5.
  2. Get help from a Mobile Mechanic. We  recommend Fixter. They will come to you and fix your vehicle at a time that suits you. Instant free quote online below. We recommend the online mechanic first, as it’s cheaper for you, and you may not need an in-person mechanic.

Which Mechanic Suits You?

  1. Chat with an Online Mechanic to get instant, unlimited help and advice for 1 full week, for just $5.
  2. Get in-person help from a Mobile Mechanic. We recommend YourMechanic. They will come to you and fix your vehicle at a time that suits you. Instant free quote online below. We recommend the online mechanic first, as it’s cheaper, and you may not need an in-person mechanic.

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2. Chat with a Human Mechanic Online
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  • Real human ASE-certified mechanics available 24/7

Which Mechanic Suits You?

  1. Chat with an Online Mechanic to get instant, unlimited help and advice for 1 full week, for just $5.
  2. Get in-person help from a Mobile Mechanic Near You. They will come to you and fix your vehicle at a time that suits you. If there are none near you, you will be redirected to the online mechanic.

Which Mechanic Suits You?

  1. Chat with an Online Mechanic to get instant, unlimited help and advice for 1 full week, for just £5.
  2. Get help from a Mobile Mechanic. We  recommend Fixter. They will come to you and fix your vehicle at a time that suits you. Instant free quote online below. We recommend the online mechanic first, as it’s cheaper for you, and you may not need an in-person mechanic.

Which Mechanic Suits You?

  1. Chat with an Online Mechanic to get instant, unlimited help and advice for 1 full week, for just $5.
  2. Get in-person help from a Mobile Mechanic. We recommend YourMechanic. They will come to you and fix your vehicle at a time that suits you. Instant free quote online below. We recommend the online mechanic first, as it’s cheaper, and you may not need an in-person mechanic.

Where Can I Find My VIN?

Your vehicle’s unique Vehicle Identification Number (VIN) can be found on the title document, the vehicle registration, and the insurance policy. It is a series letters and numbers like this as example: WAUGC0896JA235262. The VIN can also be located on the following locations on the vehicle itself:

how to find VIN on vehicle