Bosch 1408335 Unit Injector – The Scania Internal Code That Defines DC11/DSC12 Performance

In the Scania parts catalog, some numbers are for the warehouse. Others are for the engine. The 1408335 falls into the second category. It's not a Bosch production number that got repurposed - it's a Scania-assigned OEM code that just happens to point to a Bosch-manufactured unit injector. When Scania's engineers designed the DC11 and DSC12 engine platforms, they didn't spec a Bosch part number. They spec'd 1408335.

This distinction matters. The 1408335 is the number that appears in Scania's own service documentation, the number that dealership parts counters recognize, and the number that tells a technician exactly which injector belongs in that cylinder head. It's the injector that powers Scania 4-series trucks, K 124/420 models, and P,R114/380 variants across European highways and beyond.

 

 

The 1408335 is a PDE (Pump-Düse-Einheit) unit injector - also known as a UIS (Unit Injector System). Unlike common rail systems that separate pressure generation from injection, the PDE integrates both functions into a single housing mounted directly in the cylinder head cradle.

What this means in practice:

Camshaft-driven - the injector is mechanically actuated by the engine's camshaft, making it suitable for OHC engine architectures

No high-pressure plumbing - external fuel lines and accumulators are eliminated, reducing potential leak paths

220 MPa capability - the system achieves injection pressures of up to 220 MPa (approximately 2,200 bar) without a common rail

Third-generation control - the system uses a two-valve configuration: one valve controls needle movement, the other manages injection pressure

Injection doses are controlled by the engine control unit using a high-pressure solenoid valve. The ECU determines timing and duration, while the camshaft provides the mechanical force that compresses fuel to injection pressure.

 

 

Specification	Detail
Scania OEM Number	1408335
Bosch Production Number	0414701005 / 0414701105
Bosch Type Code	PDE100S2004
System	PDE / UIS (Pump-Nozzle System)
Injection Pressure	Up to 220 MPa (2,200 bar)
Control	High-pressure solenoid valve, ECU-controlled
Generation	Third-generation, 2-valve control
Drive	Camshaft-actuated, OHC compatible
Emission Standard	EURO3

The Bosch connection: The 1408335 cross-references to Bosch production numbers 0414701005 and 0414701105. These are the numbers stamped on the injector itself. The 1408335 is what Scania calls it.

Related Scania OEM numbers in the same family include 1382121, 1424462, 1425077, 1428273, 1454161, 1497364, and 1529749.

 

 

The 1408335 is purpose-built for Scania heavy-duty commercial vehicles with specific engine platforms:

Engine Applications:

Engine	Displacement	Models
DSC 12.05	12.0 liters	Scania 4-series, K 124/420
DC 11.02	10.6 liters	Scania 4-series, P,R114/380

Vehicle Models:

Scania K 124/420 - heavy-duty truck tractor

Scania P,R114/380 - heavy-duty truck

Scania 4-series - truck tractor

Emission Standard:

EURO3 compliant

Cross-platform applications: The 1408335 also appears in Volvo applications, including FH12 and FL12 models, demonstrating its cross-OEM relevance.

 

 

The 1408335 is available as both a new OEM unit and a remanufactured exchange part.

What remanufacturing means:

The injection unit is mounted directly into the cylinder head cradle

Bosch-manufactured solenoid-controlled unit injectors (PDE 1 and PDE 2) are fully dismountable and completely repairable

Remanufactured units come with a test station protocol and warranty

Why choose remanufactured:

OEM-quality performance at a lower cost

Environmentally responsible - extends component life

Backed by Bosch's quality standards

Available with extended warranty coverage

 

 

Scania's own service documentation provides specific guidance for 1408335 injector removal and installation:

Drain the fuel system - open the bleeder nipple and undo the banjo screw on the fuel manifold. The system must be empty to prevent fuel from running into the cylinders, which can cause liquid hammering

Detach the injector cables - the screws cannot be removed but must be unscrewed as far as possible

Do not lift by the spring - the spring can come loose

Use the slide hammer - turn the injector anti-clockwise until it stops. Place slide hammer 87 596 between the solenoid valve and the edge of the lower rocker cover

If stuck, tap carefully - use a rubber mallet on the solenoid valve housing

Critical note: The unit injector is not to be dismantled. Renew the entire unit

 

 

Unit injectors are wear components. The plunger and barrel lose their precision fit. The solenoid valve degrades. The nozzle erodes.

Signs that the 1408335 needs replacement:

Loss of power - the vehicle struggles under load

Rough idle or misfire - uneven fuel delivery between cylinders

Increased fuel consumption - inefficient combustion

Excessive smoke - black smoke indicates poor atomization

Hard starting - insufficient fuel pressure for reliable ignition

Service options include new OEM units, remanufactured exchange parts with test station protocols, and full injector sets for complete engine overhauls.

 

 

Q1: What's the difference between 1408335 and 0414701005?
1408335 is the Scania OEM reference number; 0414701005 is the Bosch production number. Both refer to the identical unit injector. The Bosch type code is PDE100S2004.

Q2: What vehicles use the 1408335?
It's used in Scania K 124/420, P,R114/380, and Scania 4-series trucks powered by DSC 12.05 and DC 11.02 engines. It also appears in certain Volvo FH12 and FL12 applications.

Q3: What fuel system does the 1408335 use?
It uses a PDE (Pump-Düse-Einheit) / UIS (Unit Injector System) - a pump-nozzle system. Unlike Common Rail, the injection pump and nozzle form a single unit mounted directly in the cylinder head, achieving injection pressures up to 220 MPa (2,200 bar) .

Q4: Can the 1408335 injector be repaired?
Bosch-manufactured PDE unit injectors are fully dismountable and completely repairable. However, Scania's service documentation states that the unit injector is not to be dismantled in the field - it must be renewed as an entire unit. Remanufactured exchange units are available with test station protocols.

Q5: What's the warranty on this injector?
This injector comes with a warranty that reflects the manufacturer's quality standards. Remanufactured units typically include a test station protocol.

 

 

To make your purchasing experience smooth and easy, we offer a variety of secure payment options:

We're here to make your order process worry-free - choose the payment method that works best for you!

 

 

Hot Tags: bosch 1408335 unit injector – the scania internal code that defines dc11/dsc12 performance, China bosch 1408335 unit injector – the scania internal code that defines dc11/dsc12 performance manufacturers, suppliers, factory, bosch injector