This page lists 15 electrical parts for the 2005 Buick Terraza, across 3 part types, covering the 3.5L V6 engine. Every part shows its brand, manufacturer part number and fitment notes.
The electrical system on the 2005 Buick Terraza covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors. All 15 listed parts are Alternator / Generator (12 parts), Automatic Headlamp Sensor (2 parts) and Anti-Theft Control Module (1 part).
The 2005 Buick Terraza came with a single engine, the 3.5L V6, and every part is verified against it.
9 brands supply electrical parts for the 2005 Buick Terraza, led by GM GENUINE (3 parts), REMY (3 parts) and PURE ENERGY (2 parts), plus 6 more brands. Quality grades include Remanufactured and New.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2005 Buick Terraza. 3 parts have it, including GM GENUINE 25808702 (Alternator / Generator) and TYC 211023 (Alternator / Generator). Each part number opens a page with every vehicle that part fits.
Alternator / Generator
New
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Popular | 25808702 | 🇺🇸 US 🇨🇦 CA | Fits with Regulator Assembly125 Amps(KG7)or with Regulator Assembly | View on Amazon |
| TYC Popular | 211023 | 🇺🇸 US 🇨🇦 CA | 125 Amps | View on Amazon |
| WAI GLOBAL Popular | 11023N | 🇺🇸 US 🇨🇦 CA | 105 or 125 AmpsSupplied as 125 Amp | View on Amazon |
| REMY | 91042 | 🇺🇸 US 🇨🇦 CA | with Optional Equipment125 Amps | View on Amazon |
Remanufactured
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO | 3343022 | 🇺🇸 US 🇨🇦 CA | GoldRemanufactured | View on Amazon |
| FVP | 15440 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
| PURE ENERGY | 15442 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
| PURE ENERGY | 15440 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
| REMY | 12625 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
| REMY | 12631 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
| TERREPOWER | 11021 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
| TERREPOWER | 11023 | 🇺🇸 US 🇨🇦 CA | Remanufactured | View on Amazon |
This table covers the alternators that charge the battery and run the electrical load. Typical signs include dim lights at idle, a battery lamp, or a growl from the charging pulley. Load-test the battery and inspect the belt and grounds — a bad ground mimics a failed alternator.
12 Alternator / Generator parts for the 2005 Buick Terraza come from 8 brands — REMY, PURE ENERGY, TERREPOWER and 5 other brands. The "Popular" part is GM GENUINE 25808702.
The New section lists 4 options from GM GENUINE, TYC, WAI GLOBAL and 1 other brand — brand-new units rather than rebuilt ones. GM GENUINE 25808702 is listed in this group.
The Remanufactured section lists 8 options from PURE ENERGY, REMY, TERREPOWER and 2 other brands — factory-rebuilt units with new wear components. ACDELCO 3343022 is listed in this group.
Anti-Theft Control Module
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 15219136 | 🇺🇸 US 🇨🇦 CA | Housing Material: Plastic | View on Amazon |
This table covers the Anti-Theft control modules.
One part is listed for the 2005 Buick Terraza — GM GENUINE 15219136.
Automatic Headlamp Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 12450121 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WELLS | 5S6710 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the Automatic Headlamp sensors. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors.
2 Automatic Headlamp Sensor parts are listed for the 2005 Buick Terraza, from GM GENUINE and WELLS.
Listed part numbers: GM GENUINE 12450121 and WELLS 5S6710.
Buying Electrical Parts for a 2005 Buick Terraza
On this vehicle, the electrical system covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors.
- Confirm you have the 3.5L V6 engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, clean or renew the battery terminals and grounds with any charging-system repair.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Alternator / Generator and Automatic Headlamp Sensor .
Frequently Asked Questions
How many electrical parts fit the 2005 Buick Terraza?
Our catalog currently lists 15 electrical parts for the 2005 Buick Terraza across 3 subcategories and 9 brands, covering the 3.5L V6 engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical problems on a 2005 Buick Terraza?
Common symptoms include slow cranking on cold mornings, a battery light that flickers, dim lights at idle, or a check-engine code pointing at a sensor circuit. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, clean or renew the battery terminals and grounds with any charging-system repair.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2005 Buick Terraza was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2005 Buick Terraza?
Every part on this page is matched to the 3.5L V6 engine. Then test before replacing — a failed alternator and a bad ground can look identical, and sensors are frequently condemned for wiring faults. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2005 Buick Terraza
Electrical Parts for Other Buick Terraza Years
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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.