Is the CBAB the same as the CFFB?

No. The CBAB is the earlier common-rail 2.0 TDI (2008-2012). The CFFB is the updated version (2012-2015). They use different injectors.

Do CBAB injectors need coding?

Yes. IMA coding via VCDS or ODIS is required after replacement.

How much does CBAB injector replacement cost?

A set of four remanufactured injectors costs £400-£700. Labour is 2-3 hours.

How much does it cost to replace injectors?

Replacement typically costs £150–£350 per injector depending on brand and engine. A full set of four with professional fitting usually costs £600–£1,200.

Can I drive with a faulty injector?

Driving with a faulty injector can cause engine damage, increased fuel consumption, DPF contamination, and oil dilution. We recommend diagnosis and replacement as soon as possible.

Do new injectors need coding?

Some vehicles require injector coding after replacement using manufacturer-specific diagnostic tools. Many Bosch solenoid units are plug and play. Check your engine guide for specific requirements.

Why is my diesel injector knocking?

Diesel injector knocking is typically caused by worn nozzle tips that alter the fuel spray pattern, leading to harsher combustion. Carbon buildup, incorrect injection timing, and high fuel pressure can also contribute. A professional leak-off test can confirm whether injectors are the cause.

Can a bad injector cause white smoke?

Yes. A faulty injector that dribbles fuel instead of atomising it causes incomplete combustion, producing white or grey smoke. This is especially noticeable on cold starts and typically clears as the engine warms up.

How long do diesel injectors last?

Most diesel injectors last between 80,000 and 150,000 miles depending on fuel quality, driving conditions, and maintenance. Regular fuel filter changes and using quality diesel can extend their lifespan.

Will injector cleaner fix misfire?

Injector cleaner may help with minor carbon deposits, but it cannot fix worn nozzles, failed solenoids, or internal seal leaks. If misfire persists after using cleaner, professional testing and likely replacement is needed.

VW CBAB 2.0 TDI CR Injector Problems: Symptoms & Repair (UK)

Updated for 2026 diagnostics & repair guidance

First VW 2.0 TDI common-rail engine. Predecessor to CFFB and EA288.

The CBAB marked VW Group's transition from pump-duse to common-rail injection. Found in the Golf Mk6, Audi A3 8P, and Skoda Octavia, it uses Bosch solenoid injectors at 1,800 bar. This was the first generation of VW common-rail 2.0 TDI.

OEM tested & calibrated12-month warrantyFree UK deliveryNo coding required (most models)

OEM Tested
12-Month Warranty
Free UK Delivery

Registration Lookup Find Matching CBAB Injector

Drivers also ask

Quick Diagnosis

If your CBAB engine shows:

rough idle
hard starting
white or black smoke
knocking or ticking noise
reduced fuel economy

A faulty injector may be the cause. Continue below to confirm symptoms and solutions.

Can You Drive With This Problem?

Driving short distances may be possible, but continued use can cause:

piston damage
turbo contamination
fuel dilution of engine oil
catalytic converter damage

Prolonged driving may lead to major engine failure.

Typical Repair Costs (UK)

Average costs for injector-related repairs:

£180 - £350

Per Injector

£700 - £1,200

Full Set (4)

£120 - £300

Labour

Early replacement prevents costly engine damage.

Common Injector Failure Symptoms

Owners frequently report:

Rough idle and vibration

Common-rail injector wear causes uneven fuel delivery, producing cabin vibration.

DPF regeneration issues

Worn injectors cause incomplete combustion, accelerating DPF soot loading.

Engine management light

Injector deviation codes stored when correction values exceed limits.

Cold start difficulty

Worn nozzles fail to atomise fuel correctly during pilot injection.

Full symptom guide White smoke guide

Fault Codes Linked to Injector Issues

Common diagnostic codes include:

P0201-P0204Injector circuit malfunction

P2146Fuel injector group supply voltage

Misfire diagnosis guide

How to Diagnose CBAB Injector Faults

Follow this step-by-step testing approach to identify the faulty injector:

1
Read fault codes
Connect an OBD-II scanner and note any injector-related codes (P0201–P0204, P2146, P2149). This identifies which cylinder is affected.
2
Perform a leak-off test
Disconnect the fuel return pipes and route into measuring containers. Run the engine at idle for 60 seconds. Compare volumes per cylinder against manufacturer spec.
3
Listen for injector tick
Use a mechanic's stethoscope on each injector body. A dead or irregular tick indicates a stuck or failing solenoid.
4
Check fuel rail pressure
Monitor live fuel rail pressure data via diagnostic tool. Low pressure can mimic injector symptoms and may indicate a fuel pump issue instead.
5
Inspect for external leaks
Check around injector seals for signs of fuel or combustion gas leakage. Black carbon deposits indicate a blown seal.
6
Cylinder balance test
Use diagnostic software to run a cylinder contribution test. This electronically disables each injector in turn to measure its effect on engine speed.

Full leak-off test guide Injector coding guide

Why CBAB Injectors Fail

Common causes include:

fuel contamination
high-pressure wear cycles
carbon buildup
poor fuel quality
internal valve wear

Professional remanufacturing restores spray pattern and pressure accuracy.

When Replacement Is Required

Injector replacement is recommended if:

leak-off test fails
misfire persists after coding
excessive return flow detected
spray pattern fails testing
vehicle enters limp mode

CBAB Repair Advice

CBAB injectors require IMA coding via VCDS or ODIS after replacement. Torque to manufacturer specification.

Remanufactured (Recommended)

OEM-spec rebuild with new nozzles, seals, and solenoids. Full flow testing. 12-month warranty. 40–60% less than new.

Brand New OEM

Factory-fresh from Bosch, Delphi, or Siemens. Highest cost but zero previous wear. Best for low-mileage vehicles.

Vehicles Using the CBAB Engine

This engine is commonly found in:

Volkswagen Golf Mk6

2.0 TDI 140 · 2008-2012

Audi A3

8P 2.0 TDI 140 · 2008-2012

SEAT Leon

Mk2 2.0 TDI 140 · 2008-2012

Skoda Octavia

Mk2 2.0 TDI 140 · 2008-2012

Professional Installation Tip

Always:

replace copper sealing washers
torque injectors to manufacturer specification
clean injector seats before installation
code injectors after installation (if required)

Leak-off test guide Injector coding guide

Compatible Injector Part Numbers for CBAB

The following injector part numbers are commonly associated with CBAB engines:

Bosch

0445110369

Bosch solenoid injector for CBAB

View details

Volkswagen

03L130277J

VW OE reference

View details

CBAB Injectors — Shop Now

In-stock injectors listed first for fastest delivery:

AUDI A3 ( A3 S Line Final Edition TDI 8P7) 1.6L 2013-2013 Diesel Injector

£150.00

In StockNext-day delivery12 months

AUDI A3 ( A3 S Line Final Edition TDI 8P7) 2L 2013-2013 Diesel Injector

£350.00

In StockNext-day delivery12 months

AUDI A3 ( A3 S Line TDI 8V1) 2L 2012-2015 Diesel Injector

£350.00

In StockNext-day delivery12 months

AUDI A3 ( A3 1.9 TDI A4) 1.9L 1997-2001 Diesel Injector

£1.00

Made to order12 months

AUDI A3 ( A3 1.9 TDI AUTO A4) 1.9L 1997-2000 Diesel Injector

£100.00

Made to order12 months

AUDI A3 ( A3 104 TDI 8P1) 1.9L 2008-2009 Diesel Injector

£100.00

Made to order12 months

AUDI A3 ( A3 E 104 TDI 8P1) 1.9L 2008-2009 Diesel Injector

£100.00

Made to order12 months

AUDI A3 ( A3 E SE TDI 8P1) 1.9L 2009-2010 Diesel Injector

£100.00

Made to order12 months

View all CBAB injectors

These injectors are commonly used with the CBAB engine. Confirm compatibility using your engine code or registration lookup before ordering. Our team can verify the correct part for your specific vehicle.