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OEM Parts vs. Aftermarket: What's Best for Your Vehicle?

1991 Chevrolet S10 Blazer

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At AutoNation, we understand the importance of keeping your vehicle in optimal condition. When replacing vehicle components, choosing between OEM (Original Equipment Manufacturer) and aftermarket parts significantly impacts performance, reliability, and resale value. As one of America's largest suppliers of both OEM and aftermarket components, AutoNation offers extensive expertise in helping vehicle owners make informed decisions. Understanding the key differences between these options helps protect your automotive investment.

Understanding OEM Parts

OEM parts come directly from your vehicle's manufacturer or authorized partners. These components match the original parts installed during production, ensuring perfect fitment and reliable performance. While typically more expensive than aftermarket alternatives, OEM parts like control modules maintain factory specifications and preserve warranty coverage. AutoNation sources OEM components directly from manufacturers to guarantee authenticity.

Evaluating Aftermarket Options

Aftermarket parts offer varying quality levels and price points. High-quality aftermarket manufacturers sometimes improve upon original designs, offering enhanced performance or durability. However, lower-quality alternatives might compromise vehicle function. Critical components like brake lines demand careful consideration when choosing aftermarket options.

When to Choose OEM

Complex electronic components, safety systems, and body panels typically warrant OEM parts. These components require precise specifications to maintain proper vehicle function. The sensors in modern vehicles, for example, need exact calibration to communicate with onboard computers. AutoNation's certified parts specialists help identify situations where OEM components provide crucial advantages.

Smart Uses for Aftermarket Parts

Certain maintenance items and upgrades work well with quality aftermarket parts. Non-critical components like floor mats, windshield wipers, and universal accessories often provide good value in aftermarket form. Performance enthusiasts might prefer aftermarket parts specifically designed to enhance vehicle capabilities beyond factory specifications.

Warranty Considerations

Vehicle warranties often require OEM parts for covered repairs. Using aftermarket components could void warranty coverage for related systems. AutoNation's parts specialists provide detailed warranty information to help customers maintain proper coverage while managing repair costs effectively.

Making the Right Choice

Consider your vehicle's age, intended use, and long-term ownership plans when selecting parts. Newer vehicles under warranty benefit from OEM components, while older vehicles might achieve cost savings with quality aftermarket alternatives. AutoNation's experienced staff helps evaluate these factors for each specific situation.

Why settle for less when AutoNation offers the best for your vehicle's needs?

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15530728 - Body: Lock for GM Image

Lock

GM 15530728
A latch that secures the hood to the vehicle body when shut.
Not For Sale
Fits Your Vehicle
18012265 - Brakes: Drum Brake Adjusting Screw Assembly for GM Image

Drum Brake Adjusting Screw Assembly

GM 18012265
9 1/2 x 2" Brakes. Kit. Incl.Nut,Socket and Screw.
Positions: Rear Right
$17.11
MSRP $26.52
Save $9.41
35.5% Off
Fits Your Vehicle
5464803 - Brakes: Rear Drum Brake Adjusting Hole Plug for GM Image

Rear Drum Brake Adjusting Hole Plug

GM 05464803
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors Drum Brake Inspection Plug.
Positions: Rear
$2.58
MSRP $3.99
Save $1.41
35.3% Off
Fits Your Vehicle
19421487 - Steering: Pump Pulley for GM Image

Pump Pulley

GM 19421487
For A/C Belt. Exc.Auxiliary Heater. Stamped #NL. With 6 Groove. Wo/6 Groove. Power Steering Pump Pulley.
$115.94
MSRP $164.02
Save $48.08
29.3% Off
Fits Your Vehicle
15589328 - Body: Utility Vehicle Label for GM Image

Utility Vehicle Label

GM 15589328
Utility vehicle. Utility veh caution. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by...
$18.64
Fits Your Vehicle
344171 - Universals & Rear Axle: Rear Axle Shaft Lock for GM Image

Rear Axle Shaft Lock

GM 344171
Designed, engineered, tested, and warranted for GM vehicles Precise fit for ease of installation For proper installation, locate your...
$8.23
MSRP $11.21
Save $2.98
26.6% Off
Fits Your Vehicle
23312178 - Universals & Rear Axle: Front Differential Bearing with Cup and Cone for GM Image

Front Differential Bearing with Cup and Cone

GM 23312178
Low friction rotating elements that support the drive axle differential carrier within the axle or final drive housing This GM Genuine...
$49.04
MSRP $77.84
Save $28.80
37% Off
Fits Your Vehicle
15684333 - Fuel System: Fuel Tank Bracket for GM Image

Fuel Tank Bracket

GM 15684333
2 door. Lower, all. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors Fuel...
$25.13
MSRP $32.46
Save $7.33
22.6% Off
Fits Your Vehicle
15634687 - Body: Front Grille Bowtie Logo for GM Image

Front Grille Bowtie Logo

GM 15634687
1998-04 chevrolet, gold. Chevrolet, without baja. 1998-05 usa only. Chevrolet "bowtie" gold. Brand or model identifier which enhances...
Not For Sale
Fits Your Vehicle
15957232 - Suspension: Rear Passenger Side Spring Anchor Plate for GM Image

Rear Passenger Side Spring Anchor Plate

GM 15957232
S-series. Right. Pick-up. Coil spring anchor, 2 door. Blazer. 2 door. This GM Genuine Part is designed, engineered, and tested to...
Positions: RIGHT
$70.12
MSRP $113.10
Save $42.98
38% Off
Fits Your Vehicle
9421777 - Electrical: Bulb for GM Image

Bulb

GM 09421777
Tail gate with regular bumper. Tail gate with step bumper. License lamp. Lift gate mounted. 1985-88. Station wagon. Silverado, sierra...
$4.26
MSRP $6.60
Save $2.34
35.5% Off
Fits Your Vehicle
88999163 - Electrical: Engine Control Module, Remanufactured for GM Image

Engine Control Module, Remanufactured

GM 88999163
Stamped #16144288. S-series. 4.3l. Calif. Manual trans. Auto trans, without Typhoon. Stamped #1227747. Astro, Safari. 4.3l. This part...
$155.94
MSRP $251.52
Save $95.58
38% Off
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