Audi door logo projector

The 9 Best Accessories for the Audi A4 (Must-Haves)

Are you looking to upgrade your Audi A4?

That’s awesome!

In this article, we’ve carefully compiled a list of the best accessories for your A4.

Let’s dive in!

9 Must-have accessories for the Audi A4

Ready to see some awesome accessories for your Audi A4?

1. Carly scanner

Carly homepage

Let’s start with an incredibly valuable accessory for any car owner: an OBD scanner from Carly.

The Carly OBD scanner is a device that allows you to easily access data from your Audi A4.

After plugging the Carly scanner into your Audi A4, you can connect it to the Carly app on your mobile phone via Bluetooth:

How to use the Carly scanner

Now, here’s what Carly allows you to do:

  • Find hidden errors (and save money). Carly allows you to check the health status of your car. This helps you understand the severity of any issues your A4 may have, preventing future damage and saving you time and money.
Carly scanner app diagnostics result
  • Simplify any repairs. Carly comes with a feature called ‘Smart Mechanic.’ If your Audi A4 has any issues, Smart Mechanic will provide actionable repair guidelines written by experienced mechanics!
  • Unlock hidden features. Carly’s OBD scanner can modify the software on your Audi A4 to unlock some amazing hidden features. Examples include unlocking a digital speedometer or changing the brightness of your lights!
Unlock hidden features on your Audi A4 using Carly

2. Key fob case

A key fob case is one of the best investments you can make to ensure that your Audi key stays in tip-top condition.

Not only will the case protect your key, but it also adds a bit of personal style.

Plus, with various colors and designs available on the market, you can find something uniquely suited for you:

Tukellen Key Fob Cover for Audi

Compatible with Audi:

  • A4, A3, A6, S5
  • Q5, Q7, SQ5
  • TT, R8
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We earn a commission if you make a purchase, at no additional cost to you.
11/30/2023 08:04 pm GMT

3. Car care cleaning kit

Keeping your car clean is a great way to maintain its aesthetics and value.

A car care cleaning kit will include everything you need to clean and detail the exterior and interior of your Audi like a professional.

It usually includes wax, polishes, brushes, and special soaps.

A great brand to look at if you would like to get some car care products for your Audi A4 is Chemical Guys:

Chemical Guys homepage

They offer various high-quality, proven car cleaning products that we love using.

Chemical Guys also offers several ready-to-go starter kits, like the Mobile Detailer:

Chemical Guys exterior and interior starter kit

Tip: You can find our estimated costs of maintaining an Audi A4 in this article!

4. All-weather floor mats

All-weather floor mats are a great accessory for your Audi A4, especially if you live in rainy or snowy climates or have an Audi A4 Allroad!

These mats protect your car’s floor from dirt, water, and snow.

They are made of durable materials that can withstand all types of weather conditions.

Plus, these mats typically feature anti-slip backing, so you won’t have to worry about them slipping out of place while driving.

  • 2 Row Liner
  • Black Set
  • For 2017-2022 Audi A4 / S4 / A4 All-Road
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11/30/2023 08:09 pm GMT

5. RaceChip

If you’re looking to improve the performance of your Audi A4 rather than its aesthetics, a RaceChip may be the perfect accessory for you.

RaceChip is a company that specializes in developing easy-to-install tuning boxes for various car brands.

RaceChip homepage

By modifying and optimizing the engine control unit (ECU) of your Audi A4, the RaceChip can:

  • Increase the horsepower and torque of your Audi A4 by up to 30%
  • Give your Audi A4 up to 20% more MPG
  • And it includes a comprehensive engine warranty!
Benefits of a RaceChip

For example, if you have an Audi A4 B9 with a 2.0 TFSI petrol engine, installing the RaceChip GTS Black will give you the following performance increase:

  • Power: from 252 horsepower to 319 horsepower
  • Torque: from 273 lb-ft to 372 lb-ft
Performance improvement with RaceChip for an Audi A4

Amazing, right?

You can use RaceChip for all Audi A4s, including the A4 S Line or even the S4!

Click here to learn more about RaceChip and find the performance increase for your Audi A4 model!

6. Cargo net

Do you hate hearing stuff flying around in your trunk while driving?

We do too, but there’s a solution!

Getting a cargo net for your Audi A4 is a great way to keep your car’s trunk organized and prevent items from moving around while driving:

Elastic Trunk Mesh Cargo Net
  • For Audi A4 / S4 / RS4 Quattro 2018-2023
  • Premium Trunk Organizers and Storage
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11/30/2023 08:13 pm GMT

This net can hold all of your belongings in place. It is also easy to install and remove!

7. License plate frame

Getting a custom license plate frame for your Audi A4 is the perfect way to show off your passion.

A good license plate frame will be made from durable materials like metal and feature various unique designs such as symbols, colors, or perhaps quotes that fit Audi:

Genuine Audi License Plate

A slim Audi license plate with a brushed stainless steel finish.

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11/30/2023 08:19 pm GMT

8. Door logo projector

If you’ve ever wanted to add a unique touch to your Audi A4, then a door logo projector is a great way to do just that!

LED Car Door Light Projector
  • Welcome Logo Lights
  • Compatible with A1/A3/A4/A5/A6/Q3/Q5/Q7/A7/A8/R8/TT
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This product is easy to install and gives your vehicle a distinct look that will be sure to turn heads.

It projects the Audi logo onto the ground, which looks impressive and provides safety for nighttime walks to and from the car.

For instance, it can prevent you from stepping into a dark puddle of water!

9. Valve stem caps

Not only are valve stem caps a great way to personalize your car, but they can also help maintain the pressure levels in all four tires.

(P.S. If you need new tires, here is our overview of the best tires for Audis!)

Valve stem caps come in various colors and styles to perfectly complement the look of your Audi A4 – they’re a simple upgrade that really makes an impact!

When looking for valve stem caps for your Audi A4, make sure to get durable ones built to last:

Valve Stem Caps - Carbon Fiber
$63.67 ($15.92 / Count)
  • Genuine Audi part
  • Manufactured to meet specifications for fit, form, and function
Buy Now On
11/30/2023 08:29 pm GMT


After researching the available accessories for the Audi A4, it’s clear that the best upgrades are those that provide personalized styling and enhanced performance.

The RaceChip tuning box offers improved power at a very competitive cost point.

For interior customization, a set of door logo projectors and all-weather floor mats are excellent choices.

And, with the Carly scanner, you will always be able to get detailed insights into your Audi A4’s health and unlock some fantastic hidden features!

Overall, upgrading an Audi A4 with these accessories is a great way to personalize your car and improve its performance!

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