BDFHYK 603-097 10368831 coolant reservoir for Saturn Sky Pontiac Solstice

BDFHYK 63515605 Saturn Sky coolant reservoir tank OE-style replacement

BDFHYK 603-097 coolant overflow tank for Saturn Ion Pontiac Solstice

BDFHYK 10368831 engine coolant reservoir product view for Saturn Pontiac

BDFHYK 63515605 Saturn Pontiac coolant reservoir body detail

BDFHYK Saturn Sky Pontiac Solstice coolant reservoir replacement 603-097

BDFHYK Saturn Ion coolant reservoir OE-style aftermarket replacement 10368831

BDFHYK Coolant Reservoir Tank for Saturn Sky 2007-2010 Ion 2003-2007 Pontiac Solstice 2006-2009 Replace 603-097

$24.99

Product Detail

Type Coolant Reservoir
SKU BDDLZ-BD-05-07504
OE Number 603-097, 10368831, 63515605

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BDFHYK 603-097 Saturn Sky Pontiac Solstice Coolant Reservoir Quick Answer

If the coolant reservoir on your Saturn Sky, Saturn Ion, or Pontiac Solstice is cracked, leaking, yellowed, brittle, overflowing, or no longer holding coolant properly, this BDFHYK OE-style aftermarket coolant reservoir is a replacement option for the listed applications. Before ordering, compare 603-097, 10368831, and 63515605 with your original part, then check the tank shape, hose port layout, mounting points, cap area, and sensor connection if your original tank uses one.

BDFHYK 10368831 Coolant Reservoir Overview

This BDFHYK coolant reservoir is used in the vehicle cooling system as an expansion reservoir and overflow tank for selected Saturn and Pontiac applications. A damaged reservoir can allow coolant to escape around the tank body, seam, hose connection, mounting area, or cap area. When inspection confirms the reservoir is the failed part, replacing it helps restore a proper coolant holding and recovery point in the cooling system.

Brand: BDFHYK
SKU: BDDLZ-BD-05-07504
Product type: Coolant Reservoir
OE / interchange numbers: 603-097, 10368831, 63515605
Material: PP material
Application: Selected Saturn Sky, Saturn Ion, and Pontiac Solstice models
Replacement type: OE-style aftermarket replacement, not a Genuine OEM GM, Saturn, or Pontiac part

Saturn Sky Ion Pontiac Solstice Coolant Reservoir Fitment Check

This coolant reservoir is listed for selected Saturn Sky, Saturn Ion, and Pontiac Solstice applications. Use the fitment table as a starting point, then verify your vehicle year, model, engine if applicable, OE number, original tank shape, hose ports, mounting points, and connection layout before ordering.

Year	Make	Model	Part Numbers to Compare
2007-2010	Saturn	Sky	603-097, 10368831, 63515605
2003-2007	Saturn	Ion	603-097, 10368831, 63515605
2006-2009	Pontiac	Solstice	603-097, 10368831, 63515605

Saturn Sky Pontiac Solstice Coolant Reservoir Leak and Failure Symptoms

This replacement should be considered when the original coolant reservoir is visibly damaged or confirmed as the source of coolant loss. Similar symptoms can also come from other cooling system parts, so the full system should be inspected before repair.

Symptom	When This Reservoir May Help	Other Parts to Check
Coolant spots near the reservoir	The tank body, seam, hose port, or cap area may be leaking.	Hoses, clamps, cap, radiator, thermostat housing
Cracked, yellowed, or brittle tank	The original reservoir may be aged, split, or weakened by heat cycles.	Mounting tabs, hose nipples, cap seat, nearby hose routing
Coolant reservoir empty after driving	The tank may not be holding coolant, but the leak source should be confirmed.	Radiator, water pump, hoses, clamps, trapped air
Coolant bubbling or boiling in the reservoir	The reservoir should be inspected for damage, but pressure or air issues may also be involved.	Pressure cap, thermostat, cooling fan, radiator, water pump
Coolant smell in the engine bay	Coolant residue around the reservoir or hose connection may indicate a leak.	Hoses, clamps, heater lines, radiator, nearby seals
Repeated coolant level drop	A leaking reservoir may be one cause, but a pressure test can help locate the source.	Cap condition, trapped air, radiator, thermostat, water pump

Who This 603-097 Coolant Reservoir Is For

Saturn Sky owners replacing a cracked, leaking, brittle, or stained original coolant reservoir.
Saturn Ion owners checking OE number 603-097, 10368831, or 63515605 before ordering a replacement tank.
Pontiac Solstice owners repairing coolant loss around the expansion reservoir or overflow tank area.
DIY users and repair shops servicing cooling system leaks, reservoir damage, or aged plastic tanks on listed applications.

Where the 10368831 Coolant Reservoir Is Used

The coolant reservoir is part of the engine cooling system. As coolant expands when the engine heats up, the reservoir provides a controlled area for overflow and recovery. When the engine cools, coolant can return as the system requires. On the listed Saturn and Pontiac applications, the replacement coolant reservoir should match the original tank shape, hose routing, and mounting layout before installation.

What Comes With This BDFHYK Coolant Reservoir

This listing is for one BDFHYK engine coolant reservoir / expansion reservoir / overflow tank replacement for the listed Saturn and Pontiac applications. Separate hoses, clamps, coolant, tools, cap, and sensor components are not confirmed as included. Review the product images and compare your original reservoir before installation.

Compare This 603-097 Coolant Reservoir Before You Buy

Check Before Ordering	Why It Matters
OE / interchange number	Compare 603-097, 10368831, and 63515605 with your original reservoir or fitment reference.
Vehicle year and model	This product is listed for selected Saturn Sky 2007-2010, Saturn Ion 2003-2007, and Pontiac Solstice 2006-2009 applications.
Tank shape	The replacement coolant reservoir should match the original tank body and mounting design.
Hose port layout	Incorrect hose port position can prevent proper hose routing or installation.
Mounting tabs	Mismatched mounting points can affect tank position and installation.
Cap and sensor configuration	Compare your original cap area and sensor connection, if present, with the product images.

Saturn Sky Pontiac Solstice Coolant Reservoir Installation Notes

Let the engine cool completely before working around the radiator, hoses, or coolant reservoir.
Do not remove a hot radiator cap or coolant reservoir cap if the cooling system may be pressurized.
Compare the original coolant reservoir with this replacement before installation, including OE number, tank shape, hose ports, mounting points, cap area, and sensor connection if present.
Drain or recover coolant as required by the vehicle service procedure and local handling rules.
Use the coolant type and mixture specified for the vehicle.
After installation, refill the cooling system and bleed trapped air where the service procedure requires it.
Inspect hoses, clamps, pressure cap, reservoir cap, radiator, thermostat, cooling fan operation, and water pump area during the repair.
If the old reservoir failed because of pressure or overheating, diagnose the root cause before installing the new coolant reservoir.
If the leak source is uncertain, a cooling system pressure test can help confirm whether the reservoir is the correct repair target.

BDFHYK Saturn Pontiac Coolant Reservoir OE-Style Replacement Notice

This BDFHYK coolant reservoir is an OE-style aftermarket replacement option for selected Saturn and Pontiac applications. It is not described as Genuine OEM, Official OEM, or factory original. Verify fitment, compare OE numbers, and inspect your original coolant reservoir before ordering.

Technical Specifications

Brand	BDFHYK
Product Type	Coolant Reservoir
Product Configuration	Engine Coolant Reservoir / Expansion Reservoir / Overflow Tank
SKU	BDDLZ-BD-05-07504
Fitment	Saturn Sky 2007-2010; Saturn Ion 2003-2007; Pontiac Solstice 2006-2009
Vehicle Make	Saturn; Pontiac
Vehicle Model	Sky; Ion; Solstice
OE / Interchange Number	603-097; 10368831; 63515605
Material	PP material
Application	Selected Saturn Sky, Saturn Ion, and Pontiac Solstice models
Function	Used as an expansion reservoir and overflow tank in the vehicle cooling system to provide a coolant holding and recovery point as the system heats and cools
Main Replacement Scenario	Coolant reservoir replacement after diagnosis of a cracked, leaking, yellowed, brittle, overflowing, or coolant-loss-related reservoir failure
Common Symptoms to Inspect	Coolant spots near the reservoir; cracked, yellowed, or brittle tank; coolant reservoir empty after driving; coolant bubbling or boiling in the reservoir; coolant smell in the engine bay; repeated coolant level drop
Related Parts to Check	Hoses, clamps, reservoir cap, pressure cap, radiator, thermostat housing, thermostat, cooling fan, water pump, heater lines, and trapped air in the cooling system
Package Includes	1 x BDFHYK coolant reservoir
Not Confirmed as Included	Hoses, clamps, coolant, tools, cap, and sensor components
Pre-Purchase Check	Verify vehicle year, make, model, OE / interchange number, original tank shape, hose port layout, mounting points, cap area, sensor connection if applicable, product photos, and original reservoir layout before ordering
Installation Note	Let the engine cool completely before service; do not remove a hot radiator cap or coolant reservoir cap if the cooling system may be pressurized; refill and bleed the cooling system according to the vehicle service procedure
Replacement Type	OE-style aftermarket replacement
Critical Note	This is an OE-style aftermarket replacement, not a Genuine OEM GM, Saturn, or Pontiac part.

Saturn Sky Pontiac Solstice 603-097 Coolant Reservoir FAQs

Q: Will this 603-097 coolant reservoir fit my Saturn Sky?

A: This BDFHYK coolant reservoir is listed for selected 2007-2010 Saturn Sky applications. Always verify your year, OE number, tank shape, hose ports, mounting points, and original reservoir layout before ordering.

Q: Will this coolant reservoir fit my Saturn Ion?

A: This reservoir is listed for selected 2003-2007 Saturn Ion applications. Compare 603-097, 10368831, and 63515605 with your original part before buying.

Q: Will this reservoir fit my Pontiac Solstice?

A: This coolant reservoir is listed for selected 2006-2009 Pontiac Solstice applications. Confirm the OE number, tank shape, hose port layout, mounting points, and cap area before ordering.

Q: What OE numbers should I compare for this Saturn Pontiac coolant reservoir?

A: Compare 603-097, 10368831, and 63515605. Matching the OE or interchange number helps reduce the chance of ordering the wrong coolant reservoir.

Q: Is this BDFHYK coolant reservoir a Genuine OEM part?

A: No. This is a BDFHYK OE-style aftermarket replacement coolant reservoir. It is not a Genuine OEM, Official OEM, or factory original GM, Saturn, or Pontiac part.

Q: Does this coolant reservoir include a cap?

A: Separate cap inclusion is not confirmed. Check the product images and compare your original cap area before ordering, especially if your repair requires a matching cap.

Q: Does this tank have a coolant level sensor port?

A: Sensor-port configuration should be checked against your original tank and the product images. If your original reservoir uses a sensor connection, confirm the connection layout before ordering.

Q: What problems can this coolant reservoir help solve?

A: It may help when the original coolant reservoir is confirmed to be cracked, leaking, brittle, discolored, overflowing, or unable to hold coolant properly. It should not be treated as a guaranteed fix for every coolant loss or overheating issue.

Q: Can a cracked coolant reservoir cause coolant loss?

A: Yes. A cracked coolant reservoir can allow coolant to escape from the tank body, seam, hose port, mounting area, or cap area. Hoses, clamps, radiator, cap, thermostat housing, and water pump areas should also be checked.

Q: Does an empty coolant reservoir always mean the tank is bad?

A: No. An empty coolant reservoir can be caused by a leaking tank, loose hose, bad cap, trapped air, radiator leak, water pump leak, or another cooling system problem. Inspect the full cooling system before replacing parts.

Q: Why is my coolant reservoir bubbling?

A: Bubbling may be related to trapped air, overheating, pressure cap issues, thermostat problems, fan problems, or other cooling system faults. Replace the coolant reservoir only if the reservoir is confirmed damaged or leaking.

Q: Why is my coolant reservoir overflowing?

A: Overflowing coolant can be related to overfilling, trapped air, pressure cap issues, overheating, thermostat problems, or other cooling system faults. Inspect the tank, cap, hoses, and system pressure before assuming the reservoir is the only problem.

Q: Can this reservoir fix overheating?

A: A damaged reservoir may contribute to coolant loss, which can be related to overheating. But overheating can also come from low coolant, radiator issues, thermostat failure, fan problems, water pump issues, pressure problems, or trapped air.

Q: Should I replace the reservoir cap or radiator cap at the same time?

A: Inspect the cap area during the repair. A weak or damaged pressure cap can affect cooling system pressure, so it should be checked if coolant is boiling, overflowing, bubbling, or repeatedly dropping.

Q: Do I need to bleed the cooling system after replacing this reservoir?

A: Many cooling system repairs require refilling coolant and removing trapped air. Follow the vehicle service procedure for the correct coolant type, refill level, and bleeding method.

Q: What should I check before installing this 10368831 coolant reservoir?

A: Compare the original coolant reservoir with this replacement for OE number, tank shape, hose port position, mounting tabs, cap area, sensor connection if present, and overall layout.

Q: Can I install this coolant reservoir myself?

A: Some DIY users may be able to replace a coolant reservoir with proper tools and service information. Work only on a cool engine, follow the vehicle service manual, and use the correct coolant and bleeding procedure.

Q: Why does my coolant level keep dropping after I refill the reservoir?

A: Repeated coolant loss may come from the reservoir, hoses, clamps, radiator, water pump, thermostat housing, heater lines, cap issues, or trapped air. A pressure test can help locate the leak before replacing parts.

Q: Can I use this reservoir on other GM models or years?

A: Do not assume fitment by brand or platform alone. This product is listed for selected Saturn Sky, Saturn Ion, and Pontiac Solstice applications. Other models or years require their own fitment and OE number confirmation.

Returns & Refunds

We accept returns within 30 days of delivery for eligible items. If the product is unused and in original condition, you may request a return according to our refund policy. Full policy details: View Refund Policy . We recommend contacting our support team before initiating a return to ensure the fastest resolution.

Customer Support

If you purchased the wrong part, received an incompatible item, or need installation assistance, please contact us directly.

Email: service@bdfhyk.com

Business Hours:

Mon–Fri 9:00–18:00 (GMT+8)

Mon–Fri 19:00–04:00 (UTC−6 / CST)

Manufacturing Standards

Direct Factory Supply, Cost Saving
Integrated R&D, production, and warehousing. Eliminate middleman markups: same quality at lower prices, superior quality at same prices.

Precision Inspection, Commitment to Excellence
Rigorous inspection process, international certification standards. Each product includes individual inspection.