Skip advert
Advertisement

XTOOL iOBD2 on-board diagnostic tool

Clever diagnostics box plugs into your car then sends data to your phone

Overall Auto Express rating

5.0

Speedos and in-car fuel economy readings are notoriously inaccurate, but this clever new kit flashes up real-time performance and efficiency data on your phone.

iOBD2 comprises a small white box and a free smartphone app. The box took minutes to fit, as it simply attaches to your car’s On Board Diagnostic (OBDII) port – under the steering wheel in our Kia and in the glovebox of our Peugeot.

Advertisement - Article continues below

Once you’ve downloaded the app to your Apple or Android smartphone, select iOBD2 from your list of WiFi connections. Enter your car’s details, and you get three ways to view live data: Diagnosis, Performance Test and My Dashboard. Diagnosis offers the most info, so can bring up fault codes and tell you what they mean. It found a problem on our car we thought had been rectified.

Performance Test lets you measure acceleration or braking over a set time or distance, while My Dashboard enables you to personalise the data – everything from revs, speed and efficiencyto coolant temperature. However, the displays could be clearer.

At £114, it’s not cheap. Its rival from Garmin, the ecoRoute HD (our Product of the Year 2011), is £99.99, but is for Android only. iOBD 2 works on Android and Apple devices, and is a worthy investment for its functionality.

Skip advert
Advertisement

New & used car deals

Vauxhall Corsa

Vauxhall Corsa

RRP £19,690Avg. savings £4,685 off RRP*Used from £16,811
Omoda 5

Omoda 5

RRP £23,990Avg. savings £2,192 off RRP*Used from £20,921
Hyundai Tucson

Hyundai Tucson

RRP £29,820Avg. savings £5,038 off RRP*Used from £13,172
MG MG4

MG MG4

RRP £26,995Avg. savings £7,362 off RRP*Used from £11,990
* Average savings are calculated daily based on the best dealer prices on Auto Express vs manufacturer RRP
Skip advert
Advertisement

Most Popular

Ford Escort Mexico gets new lease of life with MST Sports
MST Ford Escort - front 3/4

Ford Escort Mexico gets new lease of life with MST Sports

While not officially Fords, the MST Mk1 and Mk2 Sports should drive as sharply as they look
News
7 Jul 2025
New MG IM5 has the Tesla Model 3 beaten on price and range
MG IM5 - Goodwood front

New MG IM5 has the Tesla Model 3 beaten on price and range

The all-electric IM5 brings new technology and design to the MG line-up
News
10 Jul 2025
Car Deal of the Day: Skoda Octavia vRS is the consummate all-rounder and only £255 a month!
Skoda Octavia vRS - front cornering

Car Deal of the Day: Skoda Octavia vRS is the consummate all-rounder and only £255 a month!

A three-time Auto Express Family Car of the Year winner, paired with Golf GTI power, is our Deal of the Day for 6 July
News
6 Jul 2025