Air Flow Sensor Cleaner | 200 ml | Service spray | SKU: 4066

Here's a detailed review for the LIQUI MOLY Air Flow Sensor Cleaner: Simple solution that saved me a potentially expensive garage visit ⭐⭐⭐⭐⭐ My car had been experiencing rough idling and occasional stalling, symptoms that typically point to expensive engine diagnostics and repairs. Before heading to the garage for what I expected to be a costly investigation, I decided to try cleaning the mass air flow sensor myself with this LIQUI MOLY cleaner - and I'm glad I did. Effectiveness and results: The transformation was immediate and impressive. After spraying the sensor according to the instructions and letting it dry, the rough idling completely disappeared and the engine returned to smooth operation. What I thought might be a major engine issue turned out to be simply a dirty MAF sensor that this cleaner handled perfectly. The car now runs as smoothly as it did when newer. Ease of use: The process couldn't be simpler - locate the sensor, spray, wait for it to dry, and reassemble. The 200ml can provides plenty of product with a precise spray pattern that makes it easy to target the sensor elements without oversaturating. Clear instructions on the can help even novice DIYers feel confident about the process. Value proposition: At under £10, this saved me what could easily have been a £100+ diagnostic fee plus labor costs at a garage. Even if you only use it once, the savings are substantial. The can contains enough product for multiple applications, making it excellent value for money. Quality and reliability: LIQUI MOLY has a solid reputation for automotive chemicals, and this product lives up to that standard. The cleaner evaporates cleanly without leaving residue, and I've had no issues with sensor damage or performance problems after use. Practical considerations: The spray can is compact and stores easily in a garage or toolbox. The product has a reasonable shelf life, so you can keep it on hand for future maintenance. Bottom line: This is one of those products that can save significant money and hassle. If you're experiencing engine performance issues that might be MAF sensor related, this is definitely worth trying before expensive garage diagnostics. It's become a permanent addition to my basic car maintenance toolkit.

Used this Liqui Moly airflow sensor cleaner and honestly it felt like I just gave my engine a lung transplant. A few sprays and the sensor went from “wheezing pensioner” to “Olympic sprinter” in about 30 seconds. The idle smoothed out, throttle response sharpened up, and my MPG actually crept up like it was trying not to get noticed. Engine feels cleaner, happier, and way less moody on cold starts. Super easy to use too — remove sensor, spray, let it dry, pop it back in. No oily residue, no weird smells, no accidental engine explosions. Just clean, crisp airflow like the car can finally breathe properly again. If your engine feels a bit sluggish or grumpy, this stuff is basically a spa day for your airflow sensor.

If you're looking to give your vehicle a noticeable boost in performance and efficiency, the Liqui Moly is a game-changer that deserves your attention and will probably save you some money. I kept getting an error code, and after using this I've witnessed a smoother drive. Just a few squirts of this on the turbo sensors to clear away the muck.

Excellent spray Strong Cleans well I used to clean my map sensor for carbon deposits It’s very effective Good value And I had no lights come on on my dash after using it

Cleans maf sensor well sometimes beyond repair thou. Worked for a bit

Used to clean the air flow sensor, and it worked exactly as expected. Simple spray-on application, dries quickly, and leaves no residue. well worth having for routine maintenance.

Works really well, highly recommended.

It is okay