Sigma Car Stereo Reviews 160

TrustScore 4.5 out of 5

4.3

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See what reviewers are saying

Rated 4 out of 5 stars

Extremely happy with my New Hyundai i30 Head Unit. Awesome little Unit. Fits perfectly. Excellent follow up Communication from Khan before Purchasing. Took a month to arrive to Australia, how... See more

Rated 5 out of 5 stars

Was small delay with delivery, but Sigma team (Knah) informed about it and was asking if it is ok or send money back. Once radio arrived, all plugs and converters were included, later via mail was del... See more

Rated 5 out of 5 stars

Purchased the Mini R56 head unit about 6 months ago. Installation is straightforward with good instructions and a guide on YouTube. High quality screen and CarPlay works perfectly. A short delay... See more

Rated 3 out of 5 stars

I have bought two units off Sigma car stereo. Both for Mercs. The units are not fully plug and play as described. I had to liaise on numerous occasions for issues, that included needing wires spliced... See more

Company details

  1. Car Stereo Store

Written by the company

Welcome to Sigma Car Stereo, your trusted online destination for high-quality car stereo systems, Android head units, Apple CarPlay and Android Auto upgrades, and a wide range of car audio accessories. We specialize in providing plug-and-play car stereo solutions that are compatible with most vehicle makes and models, including Toyota, Honda, Mazda, BMW, Mercedes, and more. Whether you’re looking to upgrade your factory radio, add a backup camera, or enhance your vehicle’s sound system, we’ve got you covered. Our products are carefully selected for their reliability, performance, and ease of installation. At Sigma Car Stereo, we pride ourselves on excellent customer service, fast worldwide shipping, and expert support. Thousands of customers trust us for their car audio needs—from wireless CarPlay head units to fiber optic audio adapters. If you’re searching for the best car stereo store online, look no further. Experience the difference in quality and service with Sigma Car Stereo.


Contact info

4.3

Excellent

TrustScore 4.5 out of 5

160 reviews

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Replied to 33% of negative reviews

Typically replies within 2 weeks

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Rated 4 out of 5 stars

Good product - works as described

Good communication through the process from ordering to delivery and the product works very well - my only comment would be the lack of any instruction manual and the individual elements could be more clearly labeled - it would also be really good if the enclosed a link to a video on how to install etc

February 4, 2026
Unprompted review
Rated 5 out of 5 stars

I had an amazing experience with Sigma…

I had an amazing experience with Sigma Car Stereo. The unit I bought fit perfectly in my car and works flawlessly. The sound quality and features exceeded my expectations. A special thanks to Mr. Michael, who guided me through the entire process — from compatibility check to installation tips. Very professional and quick to respond. Highly recommended!

October 3, 2025
Unprompted review
Rated 1 out of 5 stars

This company is a disgrace do not use

This company is a disgrace , they portray themselves as a uk company - they are merely a front for Chinese operations. I ordered a radio for my sl they told me I needed to add a most adapter. At a cost of 114 Sterling. The package was supposed to be despatched within ten days. When I chased it they said it was delayed due to having to order the most adapter. Three weeks later the radio turned up no most adapter. When asked where it was they said we didn’t supply it as you don’t need it. Yet a - they never said that and b didn’t credit it. They then proceeded to supply the wrong instructions , when we had the correct wiring diagram radio didn’t work. Spent over an hour fault finding only to discover the canbus decoder was faulty. They said I needed a new one - delivery three weeks. I requested a refund they wanted me to pay to return the faulty item to china - Royal Mail 56 - I ve refused as the goods were faulty

October 1, 2025
Unprompted review
Rated 5 out of 5 stars

The aftermarket addition to my 2013 BMW…

The aftermarket addition to my 2013 BMW Z4 looks and works great! I had an issue with a repeating sound like a heartbeat when the car had power (opening a door, turning on a light, etc. before and after starting the car). I texted the help line, and they got me squared away. They provided instructions, annotated pictures and links to videos. I had to move the vehcile's fiber optic cable from the harness directly into the head unit. Not hard at all.

August 3, 2025
Unprompted review
Rated 5 out of 5 stars

Amazing team!!

Amazing team!!
I can honestly say I’ve never known a company answer questions so quickly.
The head unit was a perfect fit in the Merc SL and it looks period so not out of place in this classic !
Thank you Sigma 😍

July 29, 2025
Unprompted review
Rated 5 out of 5 stars

CLK 2007

Bought a unit for my CLK 2007 to replace the comand. Installed and happy with the unit.

Looks very oem and works well with the canbus adapter so steering wheel controls also work.

The communications is fine and unit arrived as expected.

Would but again

June 22, 2025
Unprompted review
Rated 5 out of 5 stars

Porsche PCM replacement

The PCM module was shipped and delivered very quickly for the miles traveled and the contents were damage free. My installation tech said the wiring instructions and accompanying YouTube instruction video made the replacement truly 'plug and play'. Overall, extremely satisfied.

June 15, 2025
Unprompted review
Rated 2 out of 5 stars

There are hidden taxes and fees on your purchase, the company doesn't offer any help in that regard.

Taken from the review submitted directly to the company's website:

"I ordered this specific radio because it was the one that resembled the stock OEM headunit the most. After placing my order I was informed that this headunit isn't available anymore, and was replaced by another unit that is touchscreen only. I agreed to replace the unit with that one.

A few days later I received a phone call from UPS, stating that I had a pending package sent from China for which I had supposedly paid 50$. Of course I had to correct that information, and stated the actual value of the merchandise.

I ordered the unit because Sigmacarstereo has at least two warehouses in the EU region. I never thought that the unit would be sent from outside the EU. In fact, after VAT and taxes the headunit was almost 30% more expensive than the initial value.

Sigmacarstereo tries to avoid additional costs by lying about the actual value of the goods. Of course, that doesn't work because in customs they know what the goods are actually worth.

After contacting Sigmacarstereo (Khan) about this situation I had no response whatsoever.

So keep in mind, the headunit will be significantly more expensive than you think it is after taxes are applied. Sigmacarstereo will not help you in this regard.

There are similar headunits on Amazon and other marketplaces that have similar quality and significantly better prices. You also won't have any unpleasant surprises as was the case with my purchase."

June 13, 2025
Unprompted review
Rated 4 out of 5 stars

Mini Cooper head unit, dash cam, backup camera, works great!!!

I bought a head unit for my Mini Cooper S (F56) and so far everything is working great! It comes with a link for an installation video which is extremely helpful. There is no paperwork with the unit so a User Manual would be a great benefit which is why I had to contact them regarding some of the operation but they were great in resolving my issue. Due to this issue, I only gave 4 stars. Overall, a great product and experience. Thanks guys

June 7, 2025
Unprompted review
Rated 5 out of 5 stars

R56 Mini Head Unit

Purchased the Mini R56 head unit about 6 months ago.
Installation is straightforward with good instructions and a guide on YouTube.
High quality screen and CarPlay works perfectly. A short delay on startup to connect to CarPlay, but is not intrusive. The audio quality is better than the original stock unit. Had an issue but this was resolved well by the support team. Highly recommend.

June 8, 2025
Unprompted review
Rated 2 out of 5 stars

Very mediocre

I got a Mini Cooper r56 head unit. It takes forever to boot up, like 30-45 seconds. Zlink is horrible— CarPlay rarely ever behaves correctly which defeats the purpose of having this item. The internet/wifi constantly disconnects from my phone or wifi source, making it challenging to watch youtube or Netflix while chilling in the car. I have reached out to customer service numerous times for help and they’ve insisted on me having an order number for help as if that is truly needed; I can send you screenshots of whatever information you need (facepalm). Sorry, I lost access to my email account so I cant get you the order number. I do not recommend this company.

Edit***
I sent my email address used for the order and the company denied ever doing business with me..once again, don’t recommend.

May 15, 2025
Unprompted review
Sigma Car Stereo logo

Reply from Sigma Car Stereo

Dear Vey,

Thank you for your review. We've checked our records and couldn’t find an order under your name or email, which suggests the stereo may not have been purchased from us.

Unfortunately, we’re only able to provide product support to verified customers. If you do have proof of purchase, feel free to send it over, and we’ll be happy to assist.

We also noticed your Trustpilot review and kindly request that reviews accurately reflect your actual experiences with our store. We're here to help if you have any questions.

Rated 5 out of 5 stars

The product has been perfect

The product has been perfect! Exactly what I needed! They have been very quick and helpful in responding to any questions I have had so far!

January 18, 2025
Unprompted review
Rated 5 out of 5 stars

Love the radio & service

I absolutely love my radio for my mini cooper. I have had a few issues with it, but customer service has been great and now it is working perfectly!

October 14, 2024
Unprompted review
Rated 5 out of 5 stars

Happy Customer

Very pleased with the product and most important great service!!
Am a happy customer!!✌🏾✌🏾

October 6, 2024
Unprompted review

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