The Bosch 0445110646 Injector is a high-pressure common rail solenoid injector designed for Volkswagen Audi Group (VAG) 2.0 TDI diesel engines (1968cc), widely used in Volkswagen, Audi, SEAT, and Škoda passenger cars and light commercial vehicles.
This guide covers verified injector specifications, compatible VAG applications, installation notes, maintenance best practices, common fault codes, and a real customer repair case.
All injectors supplied are 100% new aftermarket units (not remanufactured), individually tested on imported professional common rail test benches, and backed by a 6-month warranty.
As a professional diesel injector supplier and aftermarket common rail injector manufacturer, we provide technical support for workshops, diesel repair centers, distributors, and fleet operators worldwide.
Industry Experience
This guide is based on technical support cases from workshops and fleets using VAG 2.0 TDI engines across Europe, Asia, the Middle East, and the Americas.
Our technical team regularly assists with:
- Injector coding using VCDS and ODIS
- Return flow diagnosis
- Injector balance troubleshooting
- Common rail fuel system testing
- Commercial fleet maintenance support
Quick Navigation
- Product Specifications
- Compatible Engines & Vehicle Fitments (VAG 2.0 TDI)
- Quality Testing & Warranty
- Common Failure Symptoms & DTC Codes
- Diesel Injector Maintenance: Why Cool-Down Idle Matters
- Installation Notes for 0445110646 Injector
- Real Customer Case
- Related Injector Models
- FAQ
- Summary & Technical Support
1. Product Specifications of 0445110646 Injector
| Parameter | Specification |
|---|---|
| Bosch numbers | 0445110646 / 0 445 110 646 |
| Injector type | High‑pressure common rail solenoid (CRI2 / CRIN2) |
| Max system pressure | approximately 1600–1800 bar depending on ECU calibration |
| Nozzle type | Multi‑hole, laser‑drilled |
| Control valve | F00VC30400 |
| Nozzle type | DLLA162P2160 |
| Coil resistance (20°C) | 0.2 – 0.6 Ω |
| Return flow @ idle | ≤ 35 ml/min (industry standard) |
| Weight | approx. 0.6 kg |
| Construction | 100% new aftermarket (not remanufactured) |
2. Compatible Engines & Vehicle Fitments for 0445110646 Injector
The 0445110646 injector is specifically designed for the Volkswagen Group’s 2.0 TDI (1968cc) common rail diesel engine family. Based on verified B2B listings and cross-reference data, compatibility includes the following applications.
2.1 Primary Engines
- Volkswagen Group 2.0 TDI (1968cc) – Including engine codes such as:
- CNEA (132kW), CSHA (132kW), CNFB (103kW), CFHD (105kW/143HP)
- CFFA, CFFB, CFFE, CFGB, CFGC, CLJA, CLLB (suitable for 2010–2015 Audi, VW, etc.)
2.2 Known Vehicle Fitments (VAG Group)
| Make | Model / Platform | Years / Notes |
|---|---|---|
| Volkswagen | Amarok (2H) | 2010–2022 (2.0 TDI) |
| Crafter 30-50 (2E) | 2006–2016 (2.0 TDI) | |
| Transporter / Caravelle (T5/T6) | 2.0 TDI | |
| Golf VII (5G) | 2013–2020 (2.0 TDI) | |
| Jetta (1B) | 2011–2018 (2.0 TDI) | |
| Passat (3C, 36) | B6, B7, B8 (2.0 TDI) | |
| Beetle (5C) | 2011–2019 (2.0 TDI) | |
| Audi | A1 (8X) | 2010–2018 (2.0 TDI) |
| A3 (8V) | 2012–2020 (2.0 TDI) | |
| A4 (B8, B9) | 2007–2015 (2.0 TDI) | |
| A5, Q5 | With 2.0 TDI engine | |
| SEAT | Alhambra (7N) | 2010–2020 (2.0 TDI) |
| Leon, Exeo | With 2.0 TDI engine | |
| Škoda | Octavia (5E) | 2012–2020 (2.0 TDI) |
| Superb (3T) | 2008–2015 (2.0 TDI) | |
| Yeti | With 2.0 TDI engine |
Always confirm compatibility using your old injector part number, engine code, or vehicle VIN – power output variations exist across different ECU calibrations.
2.3 Cross‑Reference & OEM Numbers
| Reference Type | Number |
|---|---|
| Bosch | 0445110646 / 0 445 110 646 |
| VAG OEM | 03L 130 277 J / 03L 130 277 Q |
| Alternative Bosch | 0445110647 (paired set), 0445110368, 0445110369 |
| Aftermarket cross | 0986435166 |
| Control valve | F00VC30400 |
3. Quality Testing & Warranty for 0445110646 Injector
3.1 Injector Testing Procedures
Each injector is individually tested on imported professional common rail equipment before shipment.
Testing includes:
- High-pressure leak testing
- Injection quantity testing under multiple load conditions
- Return flow testing at idle
- Solenoid coil resistance verification
- Spray pattern inspection
- Idle stability simulation
Test reports are available upon request.
3.2 Warranty Policy
We provide:
- 6-month warranty against manufacturing defects
- Free technical support for coding and installation
- Compatibility confirmation before shipment
Warranty exclusions include:
- Contaminated diesel fuel
- Incorrect installation
- ECU tuning damage
- Wrong application matching
- Metal contamination from failed high-pressure pumps
4. Common Failure Symptoms & DTC Codes
Common Injector Failure Symptoms
In VAG 2.0 TDI engines, failing injectors commonly cause:
- Rough idle at operating temperature
- Black smoke during acceleration
- Increased fuel consumption
- Hard warm starting
- Uneven acceleration under load
- Excessive return flow
- Injector balance deviation
Common Diagnostic Trouble Codes (DTC)
The following fault codes are frequently associated with injector wear or coding issues:
- P0201 – Injector Circuit Malfunction Cylinder 1
- P0202 – Injector Circuit Malfunction Cylinder 2
- P0263 – Cylinder Contribution/Balance Fault
- P2146 – Fuel Injector Supply Voltage Circuit
- P0300 – Random Misfire Detection
- Cylinder balance correction limit exceeded
Proper diagnosis should include:
- Return flow testing
- Rail pressure analysis
- Injector coding verification
- Fuel contamination inspection
5. Diesel Injector Maintenance: Why Cool-Down Idle Matters for 0445110646 Injector
Diesel engines operate at significantly higher exhaust gas temperatures than gasoline engines. This directly affects injector nozzle durability.
What Happens During Hot Shutdown
After heavy operation such as:
- Highway driving
- Mountain driving
- Towing
- Commercial delivery operation
the cylinder head and injector nozzles remain extremely hot.
Residual diesel fuel inside the nozzle tip can carbonize during heat soak, creating hard deposits that gradually damage spray patterns.
This commonly results in:
- Black smoke
- Rough idle
- Poor combustion efficiency
- Reduced power output
Recommended Cool-Down Procedure
A simple 30–60 second idle period before shutdown can significantly extend injector service life.
Recommended Steps
- Arrive normally at destination
- Allow engine to idle for 30–60 seconds
- Shut down engine normally
This allows:
- Coolant circulation
- Oil temperature stabilization
- Lower injector tip temperatures
- Reduced carbon formation
Vehicles That Benefit Most
This practice is especially important for:
- High-mileage fleet vehicles
- Delivery vans
- Towing applications
- Euro 4 / Euro 5 diesel engines
- Vehicles operating in hot climates
Many commercial diesel workshops report noticeably longer injector lifespan in fleets using cool-down idle procedures.
6. Installation Notes for 0445110646 Injector
Correct installation is critical for injector performance and longevity.
Before Installation
Always:
- Clean injector seats thoroughly
- Replace copper sealing washers
- Inspect fuel return lines
- Replace contaminated fuel filters
- Verify rail pressure condition
During Installation
Important installation recommendations:
- Avoid touching nozzle tips directly
- Tighten injectors using manufacturer torque specifications
- Keep injector bores free from carbon debris
- Ensure leak-off connections are fully seated
After Installation
After replacement:
- Perform injector IQA coding
- Use VCDS, ODIS, or equivalent diagnostic tools
- Clear stored DTC codes
- Perform idle relearning if required
- Check return flow balance after warm-up
Failure to code injectors correctly may cause:
- Rough idle
- Misfire
- Excessive smoke
- Fuel correction imbalance
7. Real Customer Case
Fleet Repair Case – Birmingham, UK
A delivery company operating three Volkswagen Crafter 30 vans with 2.0 TDI engines experienced injector-related drivability issues.
Symptoms Reported
- Rough idle
- Black smoke under acceleration
- Increased fuel consumption
- Warm starting difficulty
A local repair garage diagnosed injector wear and recommended replacement.
Our Technical Support
The customer ordered a set of four 0445110646 injectors.
Before installation, our team recommended:
- Coil resistance testing
- Return flow testing
- Fuel rail inspection
- Injector seat cleaning
All injectors tested within specification:
- Coil resistance: 0.3–0.5 Ω
- Return flow: below 35 ml/min
Installation Results
After installation and proper IQA coding using VCDS:
- Idle became stable
- Black smoke disappeared
- Fuel economy normalized
- No further starting problems occurred
Customer Feedback
“We’ve been driving this van for 6 months since the repair. No smoke, no starting issues. Good value for money.”
Case documented in customer service records and technical support history.
8. Related Injector Models and Guide
- 0445110305 Injector – Complete Guide for JMC & Isuzu Light Diesel Engines
- Bosch 0445110541 Injector Specs for JMC 4JB1T, Isuzu & Xichai Engines
- 0445110317 Common Rail Injector: Engine Applications, Specs & Maintenance Guide
- 0445110369 — similar VAG TDI application injector
9. FAQ: 0445110646 Injector
Q1: What engines use 0445110646 injectors?
Primarily VAG 2.0 TDI (1968cc) common rail diesel engines used in Volkswagen, Audi, SEAT, and Škoda vehicles.
Q2: Is injector coding required after replacement?
Yes. IQA coding is mandatory using VCDS, ODIS, or compatible diagnostic equipment.
Q3: Can 0445110646 be used in 1.9 TDI engines?
No. Injection pressure and ECU calibration differ significantly.
Q4: What warranty is included?
6-month warranty against manufacturing defects.
Q5: How often should injectors be tested?
Return flow testing is recommended every 80,000–100,000 km for commercial diesel applications.
Q6: What is the difference between 0445110646 and 0445110647?
Both belong to the same VAG 2.0 TDI injector family and are commonly supplied as matched sets.
Q7: Can a bad injector damage the DPF?
Yes. Poor spray patterns and over-fueling can increase soot production and accelerate DPF blockage.
Q8: What causes excessive injector return flow?
Common causes include:
- Internal valve wear
- Contaminated diesel fuel
- High-pressure pump metal debris
- Injector body wear
10. Summary & Technical Support
Key Points
- 0445110646 is designed for VAG 2.0 TDI diesel engines
- Suitable for Volkswagen, Audi, SEAT, and Škoda applications
- 100% new aftermarket injector
- Individually tested before shipment
- 6-month warranty included
- Cool-down idle practice helps extend injector life
What You Receive
- Individually tested injector
- Pre-installation guidance
- Technical support for coding
- Compatibility verification
- Remote support for VCDS/ODIS setup
Contact Technical Support
For:
- Compatibility confirmation
- OEM cross-reference verification
- Injector test reports
- Wholesale inquiries
- Distributor cooperation
- Technical troubleshooting
👉 Contact us for compatibility confirmation, technical assistance, or injector testing support. Replies within 24 hours.
Disclaimer
Bosch and Cummins part numbers are used for compatibility and identification purposes only. All products described in this article are aftermarket replacement parts and are not claimed to be original Bosch or Cummins products unless explicitly stated.
Vehicle compatibility may vary depending on engine calibration and regional specifications. Professional verification before installation is recommended.
