BARDAHL 122031 DIESEL INJECTOR CLEANER 500 ML - Diesel Injector Cleaning Additive, shock treatment

Capacity: 500 ml

BARDAHL 122031 – DIESEL INJECTOR CLEANER 500 ML

Bardahl Diesel Injector Cleaner 122031 is a 500 ml shock treatment that clears deposits from injector holes and restores correct diesel atomisation. You pour it into the fuel tank, with no disassembly. It is intended for drivers who notice a drop in performance and for workshops preparing a car for its emissions inspection.

What it is for

Bardahl recommends the Diesel Injector Cleaner when these symptoms appear:

• hesitation when accelerating;
• higher fuel consumption;
• black exhaust smoke;
• unstable idle.

The cause indicated by Bardahl is dirt building up on the injectors, which reduces the efficiency of the fuel system.

Benefits

• ✅ Clears deposits from injection holes for optimal diesel atomisation
• ✅ Lubricates the injectors and diesel pump, preventing seizure even if water accidentally enters the fuel
• ✅ Helps reduce fuel consumption and polluting emissions
• ✅ Restores lost engine performance
• ✅ Treatment recommended by Bardahl before the emissions inspection
• ✅ No disassembly: poured straight into the tank

Dosage and directions

• Dosage: one 500 ml bottle treats 20 litres of diesel.
• Frequency: every 5,000 km or before the emissions inspection (MOT).

Pour the bottle into the tank and add 20 litres of diesel, so the concentration matches Bardahl's guidance.

Technical specifications

• Brand: Bardahl
• Product code (MPN): 122031
• Line: Diesel Injector Cleaner (COD 122)
• Size: 500 ml bottle
• Dosage: 500 ml in 20 litres of diesel
• Frequency: every 5,000 km or before the inspection
• Type: concentrated cleaning additive for diesel injectors
• Compatibility: all diesel engines, naturally aspirated and turbocharged, common rail and unit injector

Compatibility

Bardahl states that the Diesel Injector Cleaner is suitable for all diesel engines, naturally aspirated and turbocharged, with indirect or high-pressure direct injection (common rail and unit injector). Use with diesel fuel only.

When it does not help: the product removes deposits but does not repair an injector with a mechanical or electrical fault, a damaged pump, or turbo, EGR or sensor problems. If the engine warning light is on, a diagnosis is needed first.

Pair it with

• Bardahl 120018 Top Diesel+ 250 ml: the maintenance treatment to use every 2-3 fill-ups after the shock treatment.
• Bardahl 166031 5-in-1 Diesel Cleaner 500 ml: if besides the injectors you also want to clean valves, turbo, EGR, DPF and catalytic converter.
• Bardahl 113018 DPF Cleaner 250 ml: to keep the diesel particulate filter working efficiently.

Frequently asked questions

How much diesel does one bottle of Bardahl Diesel Injector Cleaner 122031 treat?
One 500 ml bottle of Bardahl Diesel Injector Cleaner treats 20 litres of diesel.

How often should I use Bardahl Diesel Injector Cleaner?
Bardahl recommends the treatment every 5,000 km or before the emissions inspection (MOT).

Which symptoms does the Diesel Injector Cleaner address?
Bardahl recommends it for hesitation when accelerating, higher fuel consumption, black exhaust smoke and unstable idle, when they are caused by dirty injectors.

Does it help pass the emissions inspection?
Bardahl recommends using it before the emissions inspection because it clears the injectors and helps reduce polluting emissions. It cannot guarantee the result if there are mechanical faults.

Can it be used on common rail diesel engines?
Yes. Bardahl states it is suitable for all diesel engines, naturally aspirated and turbocharged, with indirect or high-pressure direct injection, including common rail and unit injector.

Does it protect injectors and pump from water in the diesel?
According to Bardahl, the product lubricates the injectors and diesel pump, preventing seizure even if water accidentally enters the fuel.

Why pour it into 20 litres of diesel rather than a full tank?
That is Bardahl's dosage: 500 ml in 20 litres gives a high concentration suited to a shock treatment. In a larger tank the product would be more diluted.

What is the difference from Bardahl Top Diesel+?
Top Diesel+ (COD 120) is a multifunctional maintenance treatment: 250 ml in a full tank of about 60 litres every 2-3 fill-ups, and it also raises the cetane number. The Diesel Injector Cleaner (COD 122) is a concentrated shock treatment: 500 ml in 20 litres every 5,000 km.

What is the difference from the Bardahl 5-in-1 Diesel Cleaner?
The Diesel Injector Cleaner focuses on injectors and pump. The 5-in-1 Diesel Cleaner (COD 166) also works on valves, turbo, EGR valve, DPF and catalytic converter.

Does the Diesel Injector Cleaner repair a faulty injector?
No. It removes deposits but does not fix mechanical or electrical injector faults: those need a workshop diagnosis.

Why buy from Autoricambi Tritella

Since 2007 we have supplied workshops and drivers through 4 stores in the province of Teramo, Italy (Giulianova, Mosciano Stazione, Roseto degli Abruzzi, Nereto). Genuine Bardahl products, fast shipping and technical support: if you are unsure which product suits your car, contact us before buying.