Mercedes Benz M103 / M104 KE-Jetronic Fuel Injector Insulator Sleeves

Restore proper engine performance and eliminate unwanted vacuum leaks with these premium reproduction fuel injector insulator sleeves for Mercedes-Benz M103 and M104 engines equipped with the KE-Jetronic fuel injection system.
The original Mercedes-Benz insulator sleeves (OEM Part Number 103 078 02 83) have been discontinued and are no longer available from Mercedes-Benz. Over time, the original plastic sleeves become brittle, crack from engine heat and age, and allow unmetered air to enter the intake manifold.
Even small vacuum leaks at the injector sleeves can cause rough idle, unstable engine operation, difficult cold starts, poor throttle response, and reduced fuel economy.
German Parts USA LLC has reproduced these sleeves using high-quality, heat-resistant automotive-grade material to provide an OEM-style fit, reliable sealing, and long service life.
When replacing your fuel injectors, it is highly recommended to replace the injector insulator sleeves and sealing rings at the same time to ensure proper sealing and optimal engine performance.

Product Features
✔ Premium reproduction of the original Mercedes-Benz injector insulator sleeve
✔ Manufactured from high-quality heat-resistant automotive-grade material
✔ Direct replacement for the original part
✔ Helps eliminate vacuum leaks caused by cracked or deteriorated sleeves
✔ Restores smooth idle and proper engine performance
✔ OEM-style fit and appearance
✔ Durable construction for long service life
✔ Produced exclusively for German Parts USA LLC

Fits
Mercedes-Benz M103 Engines with KE-Jetronic
•    2.6L 
•    3.0L 
Mercedes-Benz M104 Engines with KE-Jetronic
•    Early KE-Jetronic equipped engines 

Compatible Vehicle Applications
Including, but not limited to:
Mercedes-Benz W124
•    260E 
•    300E 
•    300CE 
•    300TE 
Mercedes-Benz W126
•    300SE 
•    300SEL 
Mercedes-Benz R107
•    300SL 
Mercedes-Benz W201
•    190E 2.6 
Please verify the OEM part number or engine application before ordering.

OEM Reference
Mercedes-Benz Part Number
103 078 02 83
(1030780283)

Package Includes
•    Premium Reproduction Fuel Injector Insulator Sleeve(s) 
•    Ready for installation 
(Adjust quantity according to your listing.)

Why Replace the Original?
The original injector sleeves are exposed to constant heat cycling and engine vibration.
As they age, the plastic becomes brittle and develops cracks, while the sealing rings lose elasticity. This allows unmetered air to bypass the fuel injection system, creating vacuum leaks that negatively affect engine performance.
•    Rough or unstable idle 
•    Vacuum leaks 
•    Lean running condition 
•    Difficult cold starts 
•    Hesitation during acceleration 
•    Poor fuel economy 
•    Check Engine Light (where applicable) 
Replacing the injector sleeves whenever the fuel injectors are removed is inexpensive preventive maintenance that helps restore proper engine operation.

Why Choose Our Reproduction?
Our reproduction has been developed specifically for owners and restorers of classic Mercedes-Benz vehicles.
Instead of reusing old brittle injector sleeves or searching for discontinued OEM parts, you receive a newly manufactured component built from modern materials designed to withstand today's fuels and engine temperatures.
Every part is manufactured to provide excellent fit, dependable sealing, and long-lasting durability.