---
product_id: 106534792
title: "8931 Catalytic-System Cleaner, uncoloured"
brand: "liqui moly"
price: "€ 31.64"
currency: EUR
in_stock: true
reviews_count: 13
category: "Liqui Moly"
url: https://www.desertcart.de/products/106534792-8931-catalytic-system-cleaner-uncoloured
store_origin: DE
region: Germany
---

# boosts catalytic efficiency removes combustion deposits 300ml precision formula 8931 Catalytic-System Cleaner, uncoloured

**Brand:** liqui moly
**Price:** € 31.64
**Availability:** ✅ In Stock

## Summary

> ⚡ Clean your ride, clear your check engine light!

## Quick Answers

- **What is this?** 8931 Catalytic-System Cleaner, uncoloured by liqui moly
- **How much does it cost?** € 31.64 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/106534792-8931-catalytic-system-cleaner-uncoloured)

## Best For

- liqui moly enthusiasts

## Why This Product

- Trusted liqui moly brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Trusted by Thousands:** 4.2-star rating from over 2,400 users proves real-world effectiveness and reliability.
- • **Save Thousands on Repairs:** Prevents costly catalytic converter replacements by maintaining system health.
- • **Unscented & User-Friendly:** No harsh odors, easy to use with a precise 300ml dose for optimal results.
- • **Engine Revival in a Bottle:** Effectively cleans intake and combustion systems to restore peak performance.
- • **FOMO-Free Emission Compliance:** Helps your vehicle pass smog tests effortlessly, keeping you street-legal and stress-free.

## Overview

LIQUI MOLY 8931 Catalytic-System Cleaner is a 300ml unscented liquid formula designed to remove sediments and impurities from your vehicle’s intake and combustion systems. Trusted by thousands with a 4.2-star rating, it helps restore catalytic converter efficiency, reduces emissions, and prevents costly repairs, making it a must-have for maintaining peak engine performance and passing smog tests.

## Description

LIQUI MOLY 8931 Catalytic-System Cleaner 300ml

Review: Catalytic convertor cleaner...worked! - This item works! Check engine light is off in both my 2012 Jeep liberty and my 2005 Nissan...and have stayed out for 6 months and havent come back on every few weeks like they were both doing. Both passed smog with no problem after driving around for only 35 miles...... . check engine light went out. Mechanic wanted 1600 bucks to change cat in my Jeep. Finally I feel we got something for our mony!
Review: Did the job - It works

## Features

- Special combination of additives for cleaning and removal of sediments and typical impurities in the intake system and combustion
- Catalytic-system
- Item Package Weight: 0.299 kg
- Item Package Dimension: 17.6cm L x 5.0cm W x 5.0cm H

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00XBOFZK2 |
| Best Sellers Rank | #27,226 in Automotive ( See Top 100 in Automotive ) #53 in Fuel System Cleaners |
| Brand | Liqui Moly |
| Brand Name | Liqui Moly |
| Contains Liquid Contents? | Yes |
| Customer Reviews | 4.2 out of 5 stars 2,436 Reviews |
| Included Components | no |
| Item Form | Liquid |
| Item Type Name | Catalytic-System Cleaner |
| Item Volume | 300 Milliliters |
| Item Weight | 0.3 Kilograms |
| Manufacturer | LIQUI MOLY |
| Material Feature | Unscented |
| Material Features | Unscented |
| Number of Items | 1 |
| Scent | Unscented |
| Special Features | Chlorine Reduction |
| Specific Uses For Product | Automotive Exterior |
| Unit Count | 10.14 Fluid Ounces |

## Product Details

- **Brand:** Liqui Moly
- **Item Form:** Liquid
- **Material Feature:** Unscented
- **Scent:** Unscented
- **Specific Uses For Product:** Automotive Exterior

## Images

![8931 Catalytic-System Cleaner, uncoloured - Image 1](https://m.media-amazon.com/images/I/61N207u1YjL.jpg)

## Questions & Answers

**Q: Can i use this in gas tank instead of intake spray? No harm or damage**
A: No, this product not for gas tank

**Q: My vehicles reading P0421 has anyone used this product and it help with the code?**
A: Used it and it helped with a O2 sensor issue which was giving me the warning light. Eventually had to replace the O2.

**Q: Este producto tiene restriccion para transportarlo en avion?**
A: Claro que si con demasiado gusto como les parece que pedí ese producto por Amazon en todo momento me decía que estaba en camino pronto iba a llegar y así se la pasó un mes y nunca llegó pero cuando lo ordené en el mismo momento me cobraron de la tarjeta el valor del producto

**Q: Does it work for diesel engines?**
A: I don’t think so

## Customer Reviews

### ⭐⭐⭐⭐⭐ Catalytic convertor cleaner...worked!
*by G***G on September 27, 2025*

This item works! Check engine light is off in both my 2012 Jeep liberty and my 2005 Nissan...and have stayed out for 6 months and havent come back on every few weeks like they were both doing. Both passed smog with no problem after driving around for only 35 miles...... . check engine light went out. Mechanic wanted 1600 bucks to change cat in my Jeep. Finally I feel we got something for our mony!

### ⭐⭐⭐⭐⭐ Did the job
*by J***N on December 22, 2025*

It works

### ⭐⭐⭐⭐⭐ Excellent quality, but be ready to work a bit
*by M***X on August 9, 2025*

This worked great to keep the catalytic converter warning light off for several months. Be aware that it has to be sprayed into the air intake with a spray bottle, not just poured into your gas tank. It has to be sprayed into the intake downstream from the oxygen sensor, while the engine is warmed up, and with a helper keeping the rpms revved up while the first person sprays it in.

## Frequently Bought Together

- Liqui Moly 8931 Catalytic-System Cleaner, uncoloured
- Liqui Moly Catalytic System Clean 300 ml 7110. Cleans The Injection System and The Combustion Chamber.
- Liqui Moly 2007 Jectron Gasoline Fuel Injection Cleaner - 300 ml , blue , 10.14 Fl Oz (Pack of 1 )

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**Shop now:** [https://www.desertcart.de/products/106534792-8931-catalytic-system-cleaner-uncoloured](https://www.desertcart.de/products/106534792-8931-catalytic-system-cleaner-uncoloured)

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*Product available on Desertcart Germany*
*Store origin: DE*
*Last updated: 2026-02-01*