what is the capacity of this reservoir bottle?

Assuming to the listed exterior dimensions are correct (7.5x8.25x4.25 inches), the volume is roughly 260 cubic inches. A gallon is 230 cubic inches, so subtracting a few pennies for container thickness and rounded corners, it should still hold near 1 gallon.

What is the distance between the two screw holes at the top?

Mine appears to be 4 inches center to center, but I can see there can be some manufacturing variations (+/- 1/8"). As another reviewer pointed out, the holes are offset towards the outside of the tabs by about 3/16" from the center of each tab.

Does it come with a cap? Photo does not show one.

Mine did in fact come with a vented cap.

What size hose (ID - Inside Diameter) do you use for the fitting at the bottom?

I used the same hose that was in the Lexus since it was in good condition, I don't know the diameter. I just cut of about 1/2" off to make sure of a good fit and contact.

Dorman 603 001 Universal Fluid Reservoir With Cap

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

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8003 som

Duties & taxes included

In stock

Sold byAmazon KyrgyzstanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Kyrgyzstan.

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Description

🚗 Upgrade your ride with the reservoir that fits every mission!

MOUNT IT YOUR WAY - Three strategically placed mounting holes for ultimate installation flexibility.
BUILT TO BRAVE THE HEAT - Thick, durable plastic walls engineered to withstand engine heat and vibration.
COMPLETE PACKAGE ZERO HASSLE - Includes a vented cap for optimal pressure control and system performance.
TRUSTED LEGACY EXPERT SUPPORT - Backed by Dorman’s century-plus automotive expertise and ASE Blue Seal certified tech support.
ONE RESERVOIR ENDLESS POSSIBILITIES - Universal design fits cars, trucks & more—ditch the guesswork.

The Dorman 603-001 Universal Fluid Reservoir is a robust, heat-resistant coolant tank designed for universal fit across cars and trucks. Featuring thick plastic construction, three mounting holes for versatile installation, and a vented cap, it delivers reliable performance backed by over 100 years of Dorman’s automotive aftermarket expertise and ASE-certified technical support.

Specifications

ASIN	B000E35UV2
Automotive Fit Type	Universal Fit
Best Sellers Rank	#14,996 in Automotive ( See Top 100 in Automotive ) #9 in Automotive Reservoirs
Brand	Dorman
Brand Name	Dorman
Compatible with Vehicle Type	Car, Truck
Customer Reviews	4.5 out of 5 stars 2,467 Reviews
Exterior Finish	Machined
Fit Type	Universal
Fuel Type	Gasoline
Global Trade Identification Number	00019495081272
Included Components	1 Coolant Reservoir, 1 Cap
Item Dimensions	7.5 x 4.25 x 8.25 inches
Item Part Number	603-001
Item Type Name	Dorman - FLUID RESERVOIRS
Item Weight	9.6 ounces
Item dimensions L x W x H	7.5 x 4.25 x 8.25 inches
Manufacturer	Dorman Products
Manufacturer Part Number	603-001
Manufacturer Warranty Description	Limited Lifetime Warranty
Material	Plastic
Material Type	Plastic
Model Number	603-001
OEM Equivalent Part Number	0
Product Grade	like new
UPC	019495081272
Unit Count	1.0 Count
Vehicle Service Type	Car, Truck

Reviews

J**S

28.04.2026

P**N

1.08.2025

E**A

11.11.2025

C**K

3.10.2025

M**R

24.02.2026

E**Y

7.11.2025

J**.

14.12.2025

J**É

4.03.2026

C**O

7.08.2023

B**Z

27.08.2025

R**K

23.11.2025

C**R

4.06.2025

O**R

23.01.2025

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8003 som

Duties & taxes included

In stock

Sold byAmazon KyrgyzstanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Kyrgyzstan.

Secure transaction

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Dorman 603-001 Universal Fluid Reservoir with Cap

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Description

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