Click to zoom in
SKU: 826-123-102
Weapon R 2003-2006 Infiniti G35 Aluminum Coolant Overflow Tank
The Weapon R Aluminum Coolant Overflow Tank replaces the factory plastic reservoir on 2003-2006 Infiniti G35 models with a billet aluminum construction that resists cracking, corrosion, and extreme temperatures for dependable performance. It retains full OEM coolant capacity while reducing weight and enhancing engine bay appearance. Ideal for G35 owners seeking long-lasting cooling system reliability under track or street demands.
Key Features
- Billet Aluminum Build: CNC machined from solid aluminum block for superior strength, heat resistance, and durability over factory plastic
- Direct Bolt-On Design: Matches OEM mounting points and dimensions for easy installation without modifications or fabrication
- Black Anodized Finish: Shields against corrosion and wear while providing a professional blacked-out engine bay look
- Laser Etched Logo: Features genuine Weapon R branding for authentic performance part styling
- OEM-Sized Capacity: Maintains stock volume to handle coolant expansion and system pressure without adjustments
Product Notes
- Directly replaces Infiniti part numbers 140518AA00 and 140518AA10
- Works with factory hoses and sensors without adapters
- Ships in protective foam packaging inside 10in x 6in x 6in box
Installation Notes
- Professional installation recommended.
- Drain coolant before removal and refill after install per service manual
- Uses existing OEM hardware and mounting bracket
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2003-2006 | Infiniti | G35 | Base |
| 2004-2006 | Infiniti | G35 | X |
Why Choose Weapon R?
- Trusted brand with decades of performance parts experience for Japanese vehicles
- Focuses on precision engineering for motorsport and street applications
- Delivers components tested for fit and function on real-world cars
Frequently Asked Questions
-
Q: Will this fit my 2003 Infiniti G35 Base?
A: Yes it bolts directly to 2003-2006 G35 Base and 2004-2006 G35 X using OEM locations and hardware -
Q: What material and finish does it have?
A: Constructed from CNC billet aluminum with a black anodized coating for corrosion resistance and style -
Q: Does installation require special tools or modifications?
A: No basic tools suffice as it is a plug-and-play replacement reusing factory hoses cap and brackets
Shipping & Handling
- Method: Standard ground shipping via UPS or FedEx
- Availability: In stock - ships same or next business day
- Packaging: Box measures 10in x 6in x 6in with foam inserts
- Weight: 1.5 lbs shipping weight
Coolant Reservoirs
Coolant reservoirs, also called expansion tanks or overflow bottles, maintain a pressurized coolant supply that the radiator draws from as the cooling system cools down after engine-off. A cracked or leaking reservoir causes coolant loss and eventual overheating, while an upgraded billet or aluminum tank improves appearance and durability in performance engine bays.Popular UpgradesAluminum and billet coolant expansion tanks for LS and LT engine swaps and popular domestic performance vehicles are the most popular upgrades, providing a clean look and superior durability compared to factory plastic bottles that crack from heat cycling. Universal inline overflow tanks made from polished aluminum or anodized billet are popular on custom engine bays where the stock location has been eliminated. Direct-fit OEM-style replacement tanks restore coolant system function on high-mileage vehicles where the factory tank has cracked or the cap seat has deteriorated.How do I know if my coolant reser...
View Coolant Reservoirs Products
Cooling
Shop performance cooling parts at Black Ops Auto Works for premium radiators, thermostat housings, thermostats, coolant reservoirs, expansion tanks, radiator hoses, oil coolers, transmission coolers, fans and shrouds, water pumps, and thermal management upgrades for street, track, towing, diesel, and high-horsepower builds. Whether you are trying to control engine temps, improve reliability, or support demanding performance use, this collection is built around proven cooling-system upgrades for serious enthusiasts. Shop Cooling Parts by Category Browse automotive cooling system components across key product categories, including: Radiators Coolant reservoirs and expansion tanks Thermostat housings and thermostats Radiator hose kits and silicone coolant hoses Oil coolers and oil cooler accessories Transmission coolers Coolant bypass kits and coolant filters Fans and shrouds Radiator caps Water pumps Radiator shrouds, radiator stays, and cooling plates Thermal wrap, thermal tape, an...
View Cooling Products
Engine
This engine parts collection covers oil catch cans, thermostats, thermostat housings, radiator components, coolant accessories, engine covers, fuse box covers, cap covers, throttle bodies, supercharger pulleys, idler pulleys, tensioner pulleys, and engine bay dress-up parts for trucks, SUVs, muscle cars, boosted builds, high-horsepower street cars, and performance vehicles that need better reliability, cooling, airflow, oil control, and under-hood styling. The collection is particularly strong for Dodge Challenger, Charger, Durango, Jeep Grand Cherokee Trackhawk, and Ram TRX platforms running 6.2L Hellcat, 6.4L HEMI, and 5.7L HEMI engines, where oil catch can and cooling upgrades address known OEM weaknesses in the PCV and thermal management systems. Import performance platforms including GM LS-based builds, Chevrolet Camaro, and Corvette applications are also represented through Mishimoto, CSF, and ZPE GripTec product lines. Builders who invest in engine bay organization and reliab...
View Engine ProductsLet customers speak for us
Looks pretty nice
Looks pretty nice, pricing was good and the reinforcement is a big plus.
Randy H.
Black Ops Auto Works
I emailed customer service to inquire about when it would be shipped
I emailed customer service to inquire about when it would be shipped. They checked and emailed me with the answer. Customer service is A1
Ralph J.
Black Ops Auto Works
Installation was easy
Installation was easy. The price is good and it looks great on the truck.
Ralph J.
RHO Small Grille Badge
Looks as good as it fits
Looks as good as it fits,
zachary d.
Seibon 70-73 Datsun 240Z OE Carbon Fiber Hood
Nothing like it
I love it great sound and response
Luis P.
Legmaker Dodge Durango HEMI Short Ram CAI 2011-Present 5.7L
Car totally diferent with the whole kit
Car totally diferent with the whole kit. Ive stood next to wide bodies and my car gets more attention at times . Ive bought the kit twice already.
Ding D.
2015-2023 Dodge Charger Carbon Fiber Wind Splitters
Fantastic emblem! Exactly what I was looking for
Fantastic emblem! Exactly what I was looking for. Great quality emblem.
Jacobus S.
Direct Connection Black Metallic Fender Badge
Worked great for my aftermarket hood on my Chrysler 2023 300C
Worked great for my aftermarket hood on my Chrysler 2023 300C. Thanks
Robert G.
Windshield Washer Squirter Relocation Kit Universal
Easy to install and makes car sound even better
Easy to install and makes car sound even better love the winn
Tracy H.
Legmaker Challenger/Charger Hellcat Demon & Redeye Air Intake
Awesome customer support
Awesome customer support. Had multiple issues with fedex and these guys were excellent in helping me sort everything out. The drop springs are great too! I highly recommend
Anonymous
Swift Spec-R Lowering springs Jeep Grand Cherokee 2011-2021
100/100! perfect CF crafted cold air intake for 6
100/100! perfect CF crafted cold air intake for 6.4 jeep .. even makes my AWE exhaust sound even deeper and you cam here this thing sucking when accelerating even at normal speeds🥶
srt.boizzz
Legmaker 392 TH Short Ram Jeep Grand Cherokee SRT 2012-2021
