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Dorman 603-343 Pressurized Coolant Reservoir

(2007 Cadillac CTS; 2003-2006 Dodge Sprinter 2500; 2003-2005 Dodge Sprinter 3500; 2002-2008 Mercedes-Benz G500; 2009-2017 Mercedes-Benz G550 + 3 more models)

Part of: Dorman Pressurized Coolant Reservoir

Other options in this family: Dorman 603213 Dorman 603208 Dorman 603-216 Dorman 603-832 Dorman 603-381

Manufacturer

Picture for manufacturer Dorman

Part Number

603-343
14 reviews
Sale Price

$67.93

In Stock (7)

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Usually delivered within 2 days

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No Hassle Returns

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Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Dorman 603-343 Pressurized Coolant Reservoir is a direct replacement cooling system component designed to restore proper coolant capacity and pressure regulation in your vehicle. This pressurized reservoir maintains the cooling system under pressure, which raises the boiling point of the coolant and helps prevent overheating.

Key Features:

  • Direct-fit replacement for original equipment on specific vehicle applications
  • Pressurized design maintains proper cooling system pressure for optimal performance
  • Durable construction engineered to withstand engine heat and pressure cycles
  • Includes integrated pressure cap seat for secure cap fitment
  • Rigorous quality testing ensures reliable operation and long service life

Dorman is a trusted name in automotive replacement parts, offering quality-engineered components that meet or exceed OE specifications. This coolant reservoir helps maintain proper cooling system function and protects your engine from overheating damage.

Products specifications

Fits

2007 Cadillac CTS; 2003-2006 Dodge Sprinter 2500; 2003-2005 Dodge Sprinter 3500; 2002-2008 Mercedes-Benz G500; 2009-2017 Mercedes-Benz G550; 2003-2004 Mercedes-Benz G55 AMG; 2002-2006 Freightliner Sprinter 2500; 2002-2005 Freightliner Sprinter 3500

Cap Included

Yes

Capacity

2.65 L

Pressurized

Yes

Package Contents

1 Coolant Reservoir; 1 Hose; 1 Reservoir Cap

Length

8

Material

Plastic

Mounting Hole Quantity

3

Color

Clear

Height

11.5

Mounting Hardware Included

No

Cap Type

Yes

Cap Maximum Pressure Rating

15

Mounting Brackets Included

Yes

You had the part we needed, obsolete everywhere else

Great price hope to get what I'm expecting

Awesome

good job

Lowest price with shipping online

It was great

great'

So far so good!

LIFE IS GOOD! :-)

Great

I have used them a couple times. Always seem to be one of the lowest prices on the internet and pretty quick turnaround on shipping. If you live near Los Angeles, they have a warehouse in Cerritos, so things arrive real quick once they're shipped.

Easy to order...Excited to see the new part and hoping the shipping is quick.

I purchased a wiring connector and some additional wiring pins. Super fast shipping. Likely to buy from again.

Very descriptive about each part. Website is easy to use.

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