Rank #1 in Best OBD2 Scanner 2026: 10 Ranked, and the Numbers That Don't Fit
TOPDON CarPal A Bluetooth OBD2 Scanner
Price and rating as shown on Amazon when we collected them. Both change.
The TOPDON CarPal A is a Bluetooth OBD2 dongle: it plugs into the car's diagnostic port, pairs with a phone running iOS or Android, and the listing claims coverage of every crucial vehicle system from engine to steering, with read and clear codes. At £36.76 it takes the top spot in this guide and is the cheapest Bluetooth reader named in it — the TOPDON TopScan Lite is listed at £55.92 and the KINGBOLEN EDIAG Elite at £80. It carries 4.4 out of 5 from 2,969 Amazon ratings. The two most-rated readers in the guide, the ANCEL AD310 and the MOTOPOWER MP69033, sit on 64,319 and 50,531 ratings: the CarPal A matches the higher of those two on score with roughly a twentieth of the ratings behind it.
Two things in this listing are worth reading side by side. The bullet on maintenance functions names TPMS Reset among six reset services, while a reviewer on the same page reports that the tool does not do TPMS. And the item highlight carries "1 YearFree" next to a separate "1 year manufacturer" warranty — two one-year terms, only one of which the listing explains. As with every page on this site, the details here come from the Amazon listing and its customer reviews, not from testing we carried out.
How those 2,969 ratings break down
An average hides its own shape. This is the spread behind the 4.4 stars.
Specification
Exactly as published on the Amazon listing, field for field.
| Price | £36.76 |
|---|---|
| Customer rating | 4.4 out of 5, from 2,969 Amazon ratings |
| Best Sellers Rank | 73 in Automotive; 2 in OBD-II Engine System Diagnostic Tools |
| Bluetooth | 5.0, range up to 33ft/10m (as listed) |
| Operating System | iOS and Android |
| Power Source | Battery Powered (as listed) |
| Included Components | CarPal x1, Quick Start Guide x1 |
| Item Weight | 90 g |
What buyers actually say
Quoted from customer reviews on Amazon
Verified purchase“This device has saved me an absolute fortune!! Had mobile mechanic tell me that his 10k computer couldn't force a dpf Regen because it was too blocked and it would have to be removed and professionally cleaned,a 2nd opinion told me the same thing.Being cynical I did a search and ordered one of these, it actually started a Regen and after a 40 minute drive soot went from 48g to under 5g,no more limp mode or particle filter warning.”
Verified purchase“Great obd tool that does all vehicles and most modules. Great for airbag lights. Doesnt do TPMS though.”
What it is up against
The rivals it was ranked against in Best OBD2 Scanner 2026: 10 Ranked, and the Numbers That Don't Fit.
Questions people ask
How much does the TOPDON CarPal A cost?
The Amazon listing shows £36.76, the lowest price among the Bluetooth readers named in this guide.
Which systems does it cover?
The listing says the CarPal covers every crucial vehicle system, from engine to steering, and can read and clear codes, with six maintenance functions altogether. It names Oil Reset and TPMS Reset and says there are six in total.
Does it work with a phone, or does it have its own screen?
It is a Bluetooth 5.0 dongle with no cable, listed for iOS and Android, working at a range of up to 33ft/10m. The listed box contents are the CarPal and a quick start guide.
Is there a subscription?
The item highlight includes "1 YearFree". The manufacturer warranty is listed separately as 1 year manufacturer, so the listing carries two different one-year terms.
Does the TOPDON CarPal A do TPMS?
The listing names TPMS Reset as one of the six maintenance functions, but a reviewer on the same page reports that it does not do TPMS.
What is in the box?
CarPal x1 and Quick Start Guide x1. No battery or cable is named in the contents, even though the Power Source field says Battery Powered.
Comments
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