2.0L TDI CR Engine
Complete technical specifications from VW SSP 826803. The EA189 "Clean Diesel" common rail engines - CBEA, CJAA, and CKRA - featuring piezo injectors, 1800 bar injection pressure, and dual EGR. Infamous for the 2015 Dieselgate emissions scandal.
Engine Code Variants
EA189 PlatformCBEA
- Power140 hp (103 kW)
- Torque236 lb-ft (320 Nm)
- ECUBosch EDC17
- InjectorsPiezo CR
- VehiclesJetta/SportWagen
- Transmission6-spd manual / DSG
CJAA
- Power140 hp (103 kW)
- Torque236 lb-ft (320 Nm)
- ECUBosch EDC17
- InjectorsPiezo CR
- VehiclesGolf/Jetta/Beetle
- NotesMost common variant
CKRA
- Power150 hp (110 kW)
- Torque236 lb-ft (320 Nm)
- ECUBosch EDC17
- InjectorsPiezo CR
- VehiclesPassat TDI (NMS)
- NotesHigher output tune
Engine Design
2.0 TDI CREngine Configuration
- TypeInline 4-cylinder
- Block MaterialCast iron
- Head MaterialAluminum alloy
- ValvetrainDOHC 16-valve
- Fuel SystemBosch common rail
- Injection TypeDirect (piezo CR)
- Engine ManagementBosch EDC17
Internal Design (SSP 826803)
- CrankshaftForged, 4 counterweights
- Piston DesignNo valve pockets
- Piston BowlWide, flat profile
- Piston CoolingOil spray jets
- Fuel RequirementULSD (<15 ppm sulfur)
The CR engines replaced VW's earlier Pumpe Düse (unit injector) design. Key differences: the forged crankshaft uses only 4 counterweights instead of the usual 8, reducing rotating mass. Pistons have no valve pockets (unlike PD engines) and feature a wider, flatter combustion bowl for more homogeneous fuel mixing. The common rail system allows multiple injection events per cycle, reducing noise and emissions while improving refinement. See the TDI PD engine page and TDI comparison page for detailed differences.
Common Rail Fuel System
1800 barHigh Pressure System
- Pump TypeBosch CP4.1
- Max Rail Pressure1800 bar (26,100 psi)
- Pump DriveTiming belt
- Rail MaterialForged steel
- Pressure SensorOn rail, 0-2000 bar
- Pressure ControlMetering unit on pump
Injector Specifications
- TypePiezo-electric CR
- ActuationPiezo crystal stack
- Spray HolesMulti-hole nozzle
- Injection EventsUp to 5 per cycle
- Pilot InjectionYes (noise reduction)
- Post InjectionYes (DPF regen)
The Bosch CP4.1 high-pressure fuel pump is the most catastrophic failure point on these engines. The CP4 is poorly lubricated by US diesel fuel and prone to self-destruction. When it fails, metal shavings travel through the entire fuel system - contaminating the rail, injectors, fuel lines, and return lines. A single CP4 failure typically costs $8,000-$12,000+ to repair because the entire fuel system must be replaced. Many owners proactively upgrade to the more robust Bosch CP3 pump used in earlier common rail applications.
Turbocharger & Intake System
Forced InductionTurbocharger
- TypeVariable geometry (VGT)
- ActuationElectric w/ displacement feedback
- ControlECU-controlled position
- IntercoolerAir-to-air FMIC
- Boost ControlClosed-loop via ECU
Intake Manifold
- TypePlastic with flap valves
- Flap ControlElectric actuator
- FunctionSwirl generation at low RPM
- Failure ModeFlaps break off into engine
- Common FixFlap delete/removal
Emissions System
Clean DieselExhaust Aftertreatment
- Oxidation CatalystDOC (upstream)
- Particulate FilterDPF (wall-flow)
- NOx ControlNOx storage catalyst
- DPF Regen MethodPost injection (in-cylinder)
- Regen Temperature~600°C (1112°F)
- DPF Soot Load SensorDifferential pressure
EGR System (Dual)
- High-Pressure EGRExhaust to intake manifold
- Low-Pressure EGRPost-DPF to pre-turbo
- HP EGR ValveElectric, ECU-controlled
- LP EGR ValveElectric exhaust gas return
- EGR CoolerCoolant-cooled (HP circuit)
- Max EGR RateUp to 50% at part load
In September 2015, the EPA discovered that VW had installed "defeat device" software in the Bosch EDC17 ECU. During emissions testing, the ECU detected the test cycle and activated full emissions controls. During normal driving, the software reduced NOx aftertreatment to improve fuel economy and performance - resulting in NOx emissions up to 40 times the legal limit. This affected approximately 482,000 vehicles in the US with EA189 engines. VW offered buybacks, lease terminations, and an approved emissions modification for owners who chose to keep their vehicles. The scandal cost VW over $30 billion in fines, settlements, and buybacks worldwide.
Torque Specifications
Official VW SpecsCylinder Head & Valvetrain
Crankshaft & Block
Fuel System & Turbo
Timing Belt System
Need stronger fasteners? See our ARP VW/Audi fastener guide for head stud and main stud upgrade options.
Cooling & Lubrication
SpecificationsCoolant Specifications
- TypeG12++ (pink/violet)
- Capacity7.0L (7.4 qt)
- Thermostat Opens87°C (189°F)
- Operating Temp90-105°C
- Radiator Fan Stages2-speed electric
Oil Specifications
- VW SpecificationVW 507.00
- Recommended5W-30 Low-SAPS
- Capacity with Filter4.7L (5.0 qt)
- Oil Filter TypeCartridge (eco)
- Change Interval10,000 mi max
These CR TDI engines require VW 507.00 specification low-SAPS oil. Standard diesel oil will contaminate and destroy the DPF. The low sulfated ash, phosphorus, and sulfur content is critical for DPF longevity. Using incorrect oil will cause premature DPF failure and expensive replacement. Castrol EDGE Professional 5W-30 (VW 507.00) is the factory fill.
Tuning Potential
PerformanceCommon rail engines are significantly easier to tune than the earlier Pumpe Düse (PD) engines. The CR system allows precise electronic control of injection timing, pressure, and duration without mechanical modifications. ECU tuning alone yields substantial gains. The Bosch EDC17 ECU is well-documented in the tuning community.
Stage 1 - ECU Tune
Modifications
- ECU reflash / tune
- Increased rail pressure
- Adjusted boost targets
- Optimized injection timing
Notes
- 30-40 hp gain on stock hardware
- Massive torque increase (280+ lb-ft)
- Stock components handle it well
- Improved throttle response
- Fuel economy can improve
Stage 2 - Hardware
Modifications
- Stage 2 ECU tune
- DPF delete pipe
- EGR delete
- Performance intake
- 3" downpipe
Notes
- DPF removal frees exhaust flow
- Lower EGTs, more responsive
- Off-road / competition only
- Stock turbo near max efficiency
Stage 3 - Big Turbo
Modifications
- Larger turbocharger
- Upgraded intercooler
- CP3 pump conversion
- Head studs (ARP)
- Built DSG or clutch upgrade
Notes
- CP4 to CP3 swap strongly recommended
- Stock injectors good to ~250 hp
- Forged crank handles power well
- Transmission becomes weak point
Common Issues & Failure Points
TroubleshootingCritical Failure Points
- CP4 HPFP FailureCatastrophic, $8-12K+
- DPF CloggingShort-trip driving
- EGR Cooler FailureCoolant leak to exhaust
- Turbo ActuatorElectric motor failure
- Intake Manifold FlapsBreak off into engine
- DPF Pressure SensorFalse regen triggers
- NOx Sensor FailureCEL / limp mode
Maintenance Intervals
- Oil Change10,000 mi (507.00 oil)
- Timing Belt120,000 mi / 10 years
- Fuel Filter20,000 mi
- Air Filter40,000 mi
- CoolantEvery 5 years
- DSG Fluid (if equipped)40,000 mi
- DPF Ash Cleaning~120,000 mi
The #1 preventive measure is installing a CP4 disaster prevention kit - a secondary fuel filter with a smaller micron rating placed between the transfer pump and CP4. This catches contamination before it reaches the high-pressure pump. Additionally, always buy fuel from high-volume stations to minimize water and contamination risk. Some owners add a fuel additive (Stanadyne or similar) for additional lubricity. The ultimate solution is a CP3 conversion kit, replacing the fragile CP4 with the virtually indestructible CP3 design.
Vehicle Applications
US Market| Vehicle | Years | Chassis | Notes |
|---|---|---|---|
| VW Jetta TDI | 2009-2010 | A5 / Mk5 | First US CR TDI |
| VW Jetta SportWagen TDI | 2009-2010 | A5 / Mk5 | Wagon variant |
| Vehicle | Years | Chassis | Notes |
|---|---|---|---|
| VW Golf TDI | 2010-2014 | Mk6 | |
| VW Jetta TDI | 2010-2014 | A5 then NF | Most common CR TDI |
| VW Beetle TDI | 2012-2014 | A5 (5C) | |
| VW Golf Wagon TDI | 2010-2014 | Mk6 | JSW successor |
| Vehicle | Years | Chassis | Notes |
|---|---|---|---|
| VW Passat TDI | 2012-2014 | NMS / B7 | US-spec Passat, 150 hp |