KONNWEI KW905 Bluetooth OBD2 Scanner (ELM327) | iPhone & Android

219 reviews

KONNWEI KW905 Bluetooth 5.0 OBD2 Scanner (2026) — ELM327 Code Reader for iPhone/Android

Instant car diagnostics to stop surprises, save time and money on repairs and maintenance every day.

✔️ Fix faster with clear fault codes during roadside checks

✔️ Save hundreds by spotting simple fixes before mechanic visits

✔️ Monitor engine health continuously with live phone data

✔️ Avoid battery drain with switchable power and sleep mode

Quantity

Color

Kw905 red

Kw905 orange

Kw905 black

Saved me time and money by quickly finding a stubborn engine issue my mechanic missed. Easy to use with my phone, gave clear codes and live data so I fixed it myself and felt confident doing it.

Richard S.

Return Policy

We love our products and are confident you will too! That's why we are offering a 30-Day, Risk-Free Trial. If you are not in love with your results, we will give you a refund.

Tired of unexpected repairs draining your wallet and time on weekends?

Plug in the Bluetooth OBD scanner and get instant engine codes on your phone. No guessing, no expensive shop trips. Diagnose issues at home and decide if you need a mechanic or a quick DIY fix to save money.

Take confident control of car problems in minutes today

Connect to Android or iPhone, read engine codes, and view live metrics to pinpoint problems fast and plan affordable repairs.

🔧

Diagnose

Instant fault codes that tell you what to fix now.

💡

Understand

Clear code definitions so you stop guessing repairs.

📱

Monitor

Live RPM and temp readouts to catch issues early.

💸

Save

Decide cheaper fixes before paying mechanic rates.

Why RoadSense Bluetooth OBD Code Scanner?

RoadSense gives instant, readable engine codes, live data and easy phone pairing. Others force guesswork or expensive trips. This tool turns unknown check-engine lights into clear next steps and cost savings.

RoadSense Bluetooth OBD Code Scanner

Others

Accuracy

Speed

Compatibility

Simplicity

Affordable

Real drivers report faster fixes and fewer surprises

97%

Reported that reading codes cut troubleshooting time during roadside checks.

96%

Experienced that live data helped spot overheating before major damage.

98%

Noted that on-the-spot diagnosis saved money on unnecessary shop visits.

Want fast, clear data when your check engine light appears?

Read live vehicle data like RPM, speed, and coolant temp in seconds. See what matters right away and avoid driving blindly—protect your engine and arrive safely without guesswork.

Everything you need to know about RoadSense OBD Scanner before buying

Clear answers to build confidence and troubleshoot with ease today.

Which phones work with this Bluetooth OBD scanner?

Works with most Android and iPhone apps that support ELM327 Bluetooth devices. Use a recommended app, pair the scanner, and start reading codes within seconds.

Will it drain my car battery if left plugged in?

No. The built-in power switch and low-power sleep mode prevent constant drain. Keep it plugged for convenience and switch on only when diagnosing.

Can it read both gasoline and diesel engine codes?

Yes. Compatible with most OBD-II gasoline and diesel vehicles and many hybrid vehicles for standard engine and emissions diagnostics.

Do I need technical skills to use it?

No. Plug in, pair via Bluetooth, and read plain-language code descriptions. Use results to decide DIY fixes or tell your mechanic exactly what’s wrong.

Is software updated and supported?

The hardware supports free software updates via the app ecosystem. Updates improve compatibility and keep diagnostics current.

30-Day Money-Back Guarantee: Try RoadSense Bluetooth OBD Scanner Risk-Free Today

Try RoadSense for 30 days with confidence. If the scanner doesn't make diagnosing your car easier or save you time and money, return it for a full refund. No hassle—just practical diagnostics and peace of mind while you decide.

What customers are saying now

Real feedback from verified buyers

Jason P.

Verified Buyer

Mine picked up a misfire code and freeze frame that helped me pinpoint a bad coil — saved parts and time.

Peter G.

Verified Buyer

Did the basics well: reads error codes, shows speed and engine temp, and stays powered down when not in use.

David L.

Verified Buyer

Saved me a tow and a shop visit, happy with it.

James K.

Verified Buyer

Connected to my phone in seconds, showed live RPM and coolant temp clearly.

Ryan T.

Verified Buyer

Good tool to have in the glove box; reads emissions codes fast and helps explain what to tell the mechanic.

Kevin J.

Verified Buyer

Clear codes and live stream helped me troubleshoot intermittent stalling at idle; caught the issue during a short drive, very practical.

Tommy H.

Verified Buyer

Bought to diagnose an intermittent check engine light that caused rough idling. The scanner captured misfire events and freeze frame data during a short drive, pointing me to a faulty injector. Felt great to fix it myself and avoid a big shop bill.

Brian S.

Verified Buyer

Pretty solid for the price, helped me monitor fuel trim while troubleshooting idle issues.

Aaron V.

Verified Buyer

Took it to a friend's shop and compared readings; consistent with their scanner, which gave me confidence to do basic repairs at home and avoid unnecessary parts swaps.

Adam N.

Verified Buyer

Perfect for DIYers who want instant access to engine data without paying shop fees; compact and straightforward.

Chris M.

Verified Buyer

Fast reads, simple setup, really useful for weekend wrenching.

Patrick S.

Verified Buyer

Good for hobby mechanics and pros alike; plugs in, pairs with phones fast, supports many live parameters so you can confirm repairs actually fixed the problem.

Neil D.

Verified Buyer

Hooked it up to monitor fuel trim and intake pressure while I chased a vacuum leak. The live graphs made spotting spikes obvious, saved hours of guessing on my day off.

Alex B.

Verified Buyer

Works as advertised, super handy for quick checks.

Eric H.

Verified Buyer

Setup was clunky at first but once running it gives steady live data and useful codes during road testing.

Mike R.

Verified Buyer

Love it! 😊

Scott W.

Verified Buyer

I used it on a weekend project to track coolant temp and intake readings while tuning; made the job much less guesswork.