2004 Buick Regal Parts
The 2004 Buick Regal came with 2 engines (3.8L V6, 3.8L V6 Supercharged), and the right parts depend on which one you have. We list 5,036 parts across all of them — each category page below covers every engine, and each row shows which engine(s) it fits.
Every part carries its brand and manufacturer part number, so you can compare OEM-grade and aftermarket options for the same fitment and cross-reference the number against the part you're replacing before anything goes in the cart.
Browse by Engine
3.8L V6
4,152 parts · 21 categories Verified fitment3.8L V6 Supercharged
884 parts · 5 categories Verified fitmentNot sure which engine you have? Check the emissions label under the hood, your registration, or decode the VIN — the 8th character usually identifies the engine.
Parts by Category
Belt Drive Parts
110 parts · 4 subcategories · 17 brands Verified fitment Spins the accessories — serpentine and V-belts, tensioners, idlers and pulleys.Body & Lamp Assembly Parts
303 parts · 43 subcategories · 27 brands Verified fitment Covers the exterior panels, bumpers, mirrors, lamps and the trim that keeps weather and road debris out.Brake & Wheel Hub Parts
1,057 parts · 37 subcategories · 51 brands Verified fitment Handles stopping power and keeps each wheel turning true on its bearing and hub assembly.Cooling System Parts
283 parts · 24 subcategories · 44 brands Verified fitment Keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses.Drivetrain Parts
46 parts · 7 subcategories · 11 brands Verified fitment Moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware.Electrical Parts
128 parts · 21 subcategories · 28 brands Verified fitment Covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors.Electrical Bulb & Socket Parts
275 parts · 27 subcategories · 15 brands Verified fitment Covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination.Electrical Connector Parts
565 parts · 119 subcategories · 24 brands Verified fitment Supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules.Electrical Switch & Relay Parts
237 parts · 46 subcategories · 20 brands Verified fitment Covers the switches, relays and flashers that route power to everything the driver touches.Engine Parts
438 parts · 83 subcategories · 66 brands Verified fitment Covers the internals and hard parts that build compression and keep oil where it belongs — gaskets, bearings, camshafts, lifters, seals and timing components.Exhaust & Emission Parts
165 parts · 25 subcategories · 36 brands Verified fitment Carries combustion gases out safely and keeps emissions equipment — catalytic converters, O2 sensors, EGR — doing its job.Fuel & Air Parts
166 parts · 32 subcategories · 51 brands Verified fitment Meters fuel and air — pumps, injectors, filters, intake components and the sensors that balance the mixture.Heat & Air Conditioning Parts
173 parts · 31 subcategories · 36 brands Verified fitment Keeps the cabin comfortable and the windshield clear through the compressor, condenser, evaporator, heater core and blower.Ignition Parts
105 parts · 11 subcategories · 25 brands Verified fitment Delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules.Interior Parts
150 parts · 22 subcategories · 17 brands Verified fitment Covers cabin hardware — seat components, handles, switch bezels, carpet, pedals and the pieces that take daily wear.Literature Parts
1 part · 1 subcategory · 1 brand Verified fitment Covers the printed and reference material for the vehicle — owner literature, service manuals and guides.Steering Parts
109 parts · 27 subcategories · 29 brands Verified fitment Connects driver to road through the rack, pump, tie rods, and column components.Suspension Parts
333 parts · 23 subcategories · 31 brands Verified fitment Controls ride, tire contact and alignment through shocks, struts, control arms, bushings and links.Automatic Transmission Parts
272 parts · 77 subcategories · 48 brands Verified fitment Covers the automatic gearbox and its supporting cast — filters, coolers, solenoids, mounts and torque-converter parts.Wheel Parts
42 parts · 7 subcategories · 6 brands Verified fitment Covers lug nuts, studs, hub caps, TPMS sensors and trim rings.Wiper & Washer Parts
78 parts · 18 subcategories · 21 brands Verified fitment Keeps the glass clear — blades, arms, linkages, washer pumps and nozzles.Each category page covers all 2 engine options for the 2004 Buick Regal — every part shows the engine(s) it fits, and an on-page filter narrows it to yours.
Confirm your configuration
Other Buick Regal Years
Getting Fitment Right on the 2004 Buick Regal
The 2004 Buick Regal was sold with 2 engines, and that single fact drives most fitment mistakes for this vehicle. Water pumps, radiators, belts, engine mounts, exhaust components and even brake packages can differ between engine options of the same model year. Every one of the 5,036 parts listed here shows the engine(s) it fits, and the category pages include a filter that hides everything that doesn't apply to yours.
OEM-grade and aftermarket brands are listed together wherever both publish fitment for the 2004 Buick Regal, each with a full part number. That makes the practical workflow simple: find the subcategory, match the part number against your old part or repair quote, then choose the brand and grade that fits how the vehicle is used.
Frequently Asked Questions
How many parts fit the 2004 Buick Regal?
We list 5,036 parts for the 2004 Buick Regal, organized into 21 categories across 2 engine options. Every part includes the brand, manufacturer part number and fitment notes.
Which engines came in the 2004 Buick Regal?
Our records list 3.8L V6, 3.8L V6 Supercharged. Parts frequently differ between them — a part verified for one engine is not guaranteed to fit another — so identify your engine first (emissions label under the hood, or the VIN's 8th character), then use the engine filter on each category page.
Are OEM and aftermarket parts both available for the 2004 Buick Regal?
Yes — parts come from original-equipment suppliers and established aftermarket brands, shown side by side with their part numbers where both cover the same fitment. Cross-referencing those numbers is how you confirm an aftermarket part genuinely replaces the OEM one.
How do I verify a part number fits my 2004 Buick Regal?
Search the number on this site: the result shows the part, its brand and every configuration with published fitment. If your exact year, model and engine appear in that list, the number is a match. The notes column carries any remaining qualifiers — position, trim or production date.
Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.