Audi S4 Won’t Start? Here’s Quick Solutions to Most Common Problems

Introduction

As a qualified mechanic with over two decades of experience, I’ve helped plenty of people battling when their Audi S4 Won’t Start. And to be frank, not being able to start your car when you need to drive straight up sucks.

But don’t lose hope, you’ve come to the right place, no need to keep googling searches like “trouble with Audi starting“, I got you covered. My name’s Robby, a certified auto mechanic with over two decades of experience, and in this article, I’ll explain the frequent causes for why your S4 struggles to start. I’ll cover all the routine offenders so you can identify what’s happening, plus what to do to fix each specific situation. Drawing on my 20 years of firsthand experience, I’ll supply actionable troubleshooting tips to get your Audi S4 started as quick as possible!

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Why Won’t My an Audi Start?

Audi S4 wont start

Before we tackle the list of possible faults and fixes, it’s vital to first gain an understanding of the core problem. When you climb into your Audi S4 and realize “it won’t start!”, there could be multiple components causing the troubles. Perhaps the engine doesn’t turn over whatsoever, or maybe it’s turning over partially yet not igniting. Or you might hear clicking when you try to start it, but sadly no ignition occurs. All these situations can indicate various problems under the hood.

Common Reasons Why Your Audi S4 Won’t Start

There are numerous reasons why your S4 won’t start. The usual suspects cover a weak or drained battery, broken alternator, starter motor issues, fuel system problems, plus electrical or wiring issues. Each of these issues can present differently, needing specific methods of troubleshooting and fixing to get you back on the open road pronto. All of which, we’ll delve into.

Symptoms of an Audi S4 That Won’t Start

Identifying these warning signs will help uncover the main cause. Take for example, when you turn the key or press the start button and you hear it clicking but no ignition, it often means a fuel or ignition issue.

Analysis of The Reasons Why Your Audi S4 Won’t Start

The initial move in fixing the no-start hassle is understanding the precise source of the problem. So let’s take a closer look at the most frequent explanations for the S4 failing to start when you turn the key.

Battery Issues in an Audi S4

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

In the majority of cases, the most typical reason an Audi S4 won’t start comes down to battery troubles. Specifically, a drained or weak battery prevents the engine from cranking. The car’s battery provides the required power to ignite the engine and run all your vehicle’s electrical components. Signals of a struggling battery entail sluggish or strained cranking, faint headlights, or a warning light illuminated on the dash. A battery charger can recharge a dead 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 S4

car wont start alternator

The Alternator keeps the battery charged by using engine power while driving. A broken alternator can easily stop your Audi S4 from starting since it cannot recharge the battery, draining it fully so that one day you climb into your ride and it refuses to start up. Symptoms of a wonky alternator may include a lit up battery or alternator caution light on its dashboard, dim headlights while idling, or a grinding noise from the engine while running.

Starter Motor Failures in an Audi S4

car wont start wont turn over

The starter is crucial for turning over the engine when you attempt to start your Audi. In the event of starter problems, the engine might not crank, keeping your S4 from starting. Listen out for clicking noises when you turn the key or grinding as you try to start it, possibly meaning starter problems.

Fuel System Issues in an Audi S4

car wont start fuel filter

This isn’t about running out of gas like a silly goose. Rather, it’s problems in the fuel system itself that could leave your S4 unable to start up. Your car uses gas uses fuel to mix with air and runs the engine. So problems here like a clogged fuel filter or failing fuel pump relay may mean the engine is unable to get 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 S4

car wont start electrical issue
Image Credit: MechanicAnswer.com

Ok, well yes that image is a joke, but I want to emphasize modern cars now rely heavily on electronics, opening up the number of things that can go wrong. Even in older vehicles, the usual suspects include blown fuses, spark issues, faulty ignition switches, or non-working sensors. Faulty wiring and electronics like these may prevent your car 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 issue. Pinpointing and fixing these typically requires a skilled mechanic near you.

Solutions: Let’s Get Your Audi S4 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 failure to start, and then the logical next move is to attempt to fix the problem. Here’s advice for the frequent issues we’ve covered thus far:

How to Identify and Fix Battery Issues in an Audi S4

car not starting but battery is fine

If you think a battery issue is to blame for your Audi’s trouble turning on, first inspect the battery terminals Ensure 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 S4 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 replacement. 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 S4’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 S4

Car wont start replace alternator needed

If you think the alternator is the reason your vehicle won’t start, a test can confirm. If you can temporarily get the auto running (you may need a jump start), and while it’s running, disconnect the positive terminal of the battery. It’s probably the alternator if the engine conks out soon after disconnecting the positive lead. Keep in mind though this test can be dicey and harm sensitive electronics in your wheels, so chatting with a trained mechanic in your area or online is best before trying it.

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 S4. You find all the information you need about your specific vehicle by searching online for something like “check Audi vin“, 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 S4

starter motor issues in a ford

If you suspect the starter motor is the reason behind your Audi not starting, be alert for a clicking noise when you turn the 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 S4

clogged fuel filter car wont start

If you think a fuel system malfunction might be causing the no-start, listen closely for the fuel pump hum when you flip the key to “on” before trying to turn over the car. The pump should make a faint humming for a few seconds. If such a noise is not heard, the fuel pump could be defective. Problematic starting, stalling, or poor throttle response may also stem from a clogged fuel filter. Both pump and filter issues normally need a professional mechanic to inspect and repair them properly, often using fuel pressure testing and specialized 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 Issues in an Audi S4

fuses to check when car wont start

If you think it’s an wiring problem, first inspect the fuses for the ignition system, and replace any that have blown. If your S4 starts after this, it was an effective, inexpensive fix! But if your Audi S4 refuses to start, even sometimes, the ignition switch itself could be problematic. Warning lights on the dashboard could also mean a damaged sensor. These can be complex problems needing a qualified mechanic to identify and properly repair (see below advice on local mechanics).

How to Prevent Starting Issues in an Audi S4

As granpa used to say: “An ounce of prevention is worth a pound of cure”. Here’s how to avoid future issues starting your S4:

Regular Maintenance of Your Audi S4

Regular maintenance on car to prevent starting issues

Routine maintenance is key to avoiding issues, including oil changes, checking the battery, cleaning terminals, replacing the fuel filter as needed, and having a mechanic examine the car routinely. If confused about maintenance for your model, consult a mechanic locally or online for clarification.

Drive Your S4 Regularly

drive regular to avoid car troubles

If your Audi S4 happens to sit motionless in your garage or driveway for extended times without being driven, the battery can deplete as it is not being recharged by the engine running, through the alternator. Try your best to use your vehicle regularly to maintain a charged battery. If you remember you haven’t driven your car in a while, take it for a quick spin around town to ensure there is still a charge left.

Note: Letting the battery completely run out of charge 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 weird things like unusual sounds, 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 you have limited time available, or despite putting in real effort on your own, you still can’t get your car to start, consider consulting an Audi mechanic online. It delivers expert guidance in just minutes from the comfort of your living room, and is far less expensive than a tow and diagnosis at the local garage.

Advantages of an Online Audi Mechanic

Happy mechanic repairing car looking at camera

Online Audi mechanics can review your symptoms, past repair history, and circumstances to provide troubleshooting steps tailored to your situation. With so many Audi mechanics available they can help fix nearly any problem, it doesn’t if matter it’s your S4 that’s having issues or an Audi S3 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 problems you’re having, ask Audi mechanics endless questions, and even upload images and videos so you can demonstrate to the mechanic what you mean. You can talk to them via instant messenger or voice chat, whichever you prefer. The Audi specialist will ID the problem, recommend the top solution for your specific situation, and even walk you through basic maintenance 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 to see firsthand how convenient fixing problems can be.

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

When and How to Get a Local Audi Mechanics Help

automobile mobile mechanic

When your Audi S4 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 S4 started again ASAP.

So if you think a mobile mechanic is the best solution for you, instead of searching on Google something like  “travelling mechanic near me“, 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:

  • They use experienced ASE-certified mechanics
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  • Low Cost compared to regular garages

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

  1. Visit their official website here: YourMechanic
  2. Get an instant free quote for what you need
  3. Book a time and place for the mechanic to come to you
  4. The mechanic will arrive in a fully stocked repair van and repair it right in front of you
  5. Pay when the job is completed.

Super easy, super reliable, super convenient, and highly recommended.

Conclusion

In short, when your Audi S4 doesn’t turn over, it can be a major inconvenience. However, grasping what might be triggering the issues, being able to troubleshoot them, and knowing what actions are required in each case, and where to find help if needed, will be a huge help. Keep in mind that routine care is key to preventing most vehicle problems.

Frequently Asked Questions (FAQs) When a Audi S4 Won’t Start

Audi S4 won’t start but lights come on?

If your Audi S4‘s lights illuminate but it still won’t start, the issue is likely not related to the battery. More than likely there is a problem with the engine starter. Investigate if you hear any clicking noises when attempting to crank the key. If so, the starter motor is attempting to activate but failing. Get a mechanic examine the starter motor – it may need to be repaired or replaced.

Audi S4 won’t start but has power?

When your Audi S4 has power (lights, radio etc work) but fails to start, 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, get a mechanic check the fuel system.

Audi S4 won’t start but battery is fine?

If your Audi S4‘s battery tests fine and is fully charged, but the car still refuses to start, the underlying cause is likely electrical. Possible issues 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 accurately identify the specific electrical fault and have it repaired.

Audi S4 won’t start just clicking?

When you turn the key and there’s only a clicking noise but the engine fails to turn over, 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 mechanical repair or replacing, consult with a reliable mechanic to get your Audi S4 running again.

What if my Audi S4 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’ll talk about here. If you still can’t locate the exact issue, you’ll have to ask for help from a trusted Audi mechanic locally or online.

Determine if my Audi S4 won’t start because of a bad battery?

Clues that your Audi’s battery is the issue include, a slow cranking engine, dim headlights, and battery warning symbols lighting up on the dash. You can also make sure 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 S4 from failing to start in the future?

To prevent this frustration from repeating, regular servicing is crucial. This includes oil changes, inspecting the battery and cleaning its terminals, replacing the fuel filter when necessary, and getting your Audi S4 checked out by a mechanic on a regular basis. Also, be diligent about drive the car frequently so the battery stays charged.

Can I consult an online mechanic if my Audi S4 fails to start up?

Yes, you can. An online mechanic service like ours can offer instant professional Audi mechanic aid and suggestions, without you having to leave your home. If your vehicle fails to start and is stuck in the driveway, this is especially helpful.

In what ways can services like MechanicAnswer.com be of service if my Audi S4 isn’t starting?

We connect you with certified Audi mechanics who can provide proposals specific to your individual predicament. You can update them about your auto issues, ask unlimited questions as needed, upload images and videos so you can comprehensively demonstrate the problem. The mechanic will be capable to assist, pinpoint the issue, and propose the ideal plan of action and walk you through it.

Interesting Audi S4 Facts

Did you know that the Audi S4 is equipped with a turbocharged V6 engine that can go from 0 to 60 mph in just 4.4 seconds? That’s faster than you can say “Audi S4”! And get this – it has a top speed of 155 mph, so you better hold on tight when you hit the gas! But it’s not all about speed – the S4 also comes with all-wheel drive, making it perfect for navigating those tricky road conditions. And if you’re a tech junkie, you’ll love the virtual cockpit and infotainment system that comes standard in this beast of a car. So next time you’re behind the wheel of your Audi S4, just remember that you’re driving a machine that’s as impressive as it is fast!

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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.

Choose Your Mechanic

1. Chat with A.I. Mechanic (Robot Robby)
  • Free 7-day trial
  • A.I. Mechanic that is trained by our human mechanic writers. As helpful as a human mechanic for expert advice, troubleshooting, and repair guidance.
2. Chat with a Human Mechanic Online
  • Join for just $5, and $39/month. Cancel anytime
  • 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