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          Genuine Buick 12603781 - Engine Oil Level Sensor

          MPN: 12603781
          0.0
          Vehicle Specific
          Check if this part fits your vehicle.
          • $32.95
          In stock

          Product Overview

          The Genuine Buick 12603781 Engine Oil Level Sensor is a critical component designed to monitor the oil level in your vehicle's engine. This high-quality sensor ensures reliable performance and accurate readings, helping to maintain optimal engine health. Manufactured to OE specifications, it guarantees a perfect fit and dependable operation for your Buick. Trust in Genuine Buick for exceptional quality and compatibility with your vehicle. Choose Genuine Buick 12603781 for dependable performance and peace of mind every time you service your vehicle.

          Cross Reference Numbers

          This Genuine Buick 12603781 is equivalent to or replaces the following part numbers:

          Vehicle Compatibility

          • Buick Rendezvous (2004-2006) 3.6 V6
          • Buick LaCrosse (2005-2008) 3.6 V6

          This also fits other applications. Please use the vehicle selector tool to verify fitment.

          Why Choose Newparts.com?

          • Trusted by DIYers and pros for over 15 years
          • Over 20 million auto parts shipped
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          • Exclusive Kits That Fitâ„¢ - complete repair solutions with no guesswork
          • Fast, reliable shipping from our U.S. warehouses

          Frequently Asked Questions

          What is the purpose of the engine oil level sensor?

          The engine oil level sensor, like the Genuine Buick 12603781, is designed to monitor the oil level in your engine and alert you if it is low, helping to prevent engine damage due to insufficient lubrication.

          How do I know if my oil level sensor is faulty?

          If you experience warning lights on your dashboard regarding oil level or receive inconsistent readings, your oil level sensor may be faulty. Replacing it with the Genuine Buick 12603781 can restore accurate monitoring.

          What are common symptoms of a malfunctioning oil level sensor?

          Common symptoms include oil warning lights on the dashboard, fluctuating oil level readings, or unusual engine noises due to low oil levels. Replacing the sensor with the Genuine Buick 12603781 can resolve these issues.

          Are there any diagnostic trouble codes associated with the oil level sensor?

          Yes, there can be several diagnostic trouble codes (DTCs) related to oil level sensors, including P0520, P0521, and P0522. If you encounter these codes, consider replacing your oil level sensor with the Genuine Buick 12603781.

          Why should I buy the Genuine Buick 12603781?

          Choosing the Genuine Buick 12603781 ensures you receive a factory-correct replacement that meets all OEM standards. Order Genuine Buick 12603781 today for a factory-correct replacement that restores safety and performance.

            • Newparts SKU
              2011727
            • Weight
              0.48 lbs
            • Dimensions (L x W x H)
              6.304 x 3.0622 x 3.918 in
            • Manufacturer Part #
              12603781
          • Brand
            Genuine Buick
          • Manufacturer
            Genuine Buick
          • MPN
            12603781
          • Part Type
            Engine Oil Level Sensor
          • Fitment
            • Fitment Type
              Vehicle Specific
          YearMakeModelSubmodelNotes
          2006BuickRendezvousCX (3.6 V6 GAS)Notes: 3.6 LITER
          2006BuickRendezvousCXL (3.6 V6 GAS)Notes: 3.6 LITER
          2006BuickLaCrosseCXS (3.6 V6 GAS)Notes: Incl.Seal
          2005BuickRendezvousCXL Plus (3.6 V6 GAS)Notes: 3.6 LITER
          2005BuickRendezvousUltra (3.6 V6 GAS)Notes: 3.6 LITER
          2005BuickLaCrosseCXS (3.6 V6 GAS)Notes: Incl.Seal
          2004BuickRendezvousCXL (3.6 V6 GAS)Notes: 3.6 LITER
          2004BuickRendezvousUltra (3.6 V6 GAS)Notes: 3.6 LITER
          2008BuickLaCrosseCXS (3.6 V6 GAS)Notes: Incl.Seal
          2007BuickLaCrosseCXS (3.6 V6 GAS)Notes: Incl.Seal
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          Warranty Overview

          At Newparts, we stand behind the quality of the products we sell. Every part we offer is backed by a warranty designed to give you peace of mind and protect your investment.

          Standard Warranty – Most Parts

          • Coverage: 2 years or 24,000 miles (whichever comes first) from purchase date.

          • Protection: Defects in materials or workmanship under normal personal use.

          • Eligibility: Applies only to the original purchaser and the vehicle where the part was first installed.

          • Exclusions:

            • Wear-and-tear items (brake pads, filters, bulbs, wipers, etc.)

            • Commercial, fleet, rideshare, off-road, or racing use

            • Improper installation, misuse, accidents, or modifications

          • Not Covered: Labor, shipping, towing, or incidental costs.

          Bison Performance Warranty – Our House Brand

          • Coverage: Limited Lifetime Warranty for as long as you own your vehicle.

          • Applies To: All products sold under the Bison Performance label.

          • Premium Protection: Goes beyond our standard warranty — if it’s a Bison product, the 2-year/24k mile limit is replaced with lifetime coverage.

          • Exclusions: Same as the standard warranty (normal wear, commercial use, improper installation, etc.).

          • What’s Included: Replacement of the defective product (labor and shipping excluded).

          Warranty Claim Requirements

          To keep claims fast and fair, we require:

          • Proof of purchase (invoice or order confirmation).

          • Photos or videos showing the defective part, order number, date, VIN, and odometer reading.

          • Diagnostic reports or part returns for non-visible issues may be requested.

          • Claims must be truthful, properly documented, and reflect normal consumer use.

          Buy With Confidence: We back our products because we believe in their quality, with a transparent, customer-first warranty process you can trust. And with Bison Performance products, you’ll enjoy Limited Lifetime protection—an assurance few brands can match.

          For full details and exclusions, please see our complete Warranty Terms & Conditions.


          This summary is for convenience only. For full warranty coverage details, exclusions, and requirements, see our official Warranty Terms & Conditions. In case of conflict, the full policy governs.

          Return Policy Overview

          Most parts can be returned within 30 days of delivery if unused, uninstalled, and in original packaging.
          To start a return, use our Return Portal or contact support.

          • Restocking fee: Up to 20% may apply for certain orders (buyer’s remorse, order errors, or special-order items)

          • Refunds: Issued to your original payment method within 3–5 business days after inspection

          • Exchanges: Not automatic — please return and reorder

          • Replacements: May be approved for incorrect or defective items reported within 7 days

          Not returnable:

          • Used or installed parts

          • Electrical components

          • Opened filter kits, gaskets, or contaminated items

          • Final sale or custom orders

          Important Notes:

          • Return shipping is your responsibility unless we made a verified error

          • Fitment is the customer’s responsibility (we can assist, but do not guarantee)

          • Country of origin may vary and is not grounds for return

          For complete details, please see our full Return Policy.



          This Returns summary is provided for convenience only. All returns, refunds, and exchanges are subject to the complete Returns Policy. In the event of any conflict, the full policy governs.

          Fast, Reliable Shipping — Straight to Your Door

          We ship most orders the same day when placed before 2 PM CST (Monday–Friday). Our main warehouse is just east of Nashville, TN, and we also ship from multiple locations nationwide to get your order to you as quickly as possible.

          • We use trusted carriers like UPS, FedEx, and USPS.

          • Tracking info is emailed to you as soon as your order ships.

          • Delivery estimates at checkout are based on carrier data, but not guaranteed.

          Need help with a shipment?

          If your order is missing, damaged, or incorrect, just let us know within 5 days of delivery. We’ll walk you through the quick claim process — including a few photos to help us make things right.

          For full details, please see our complete Shipping Policy.


          This Shipping summary is provided for convenience only. Delivery times, carrier terms, fees, restrictions,  risk of loss, and other details are governed by our complete Shipping Policy. In the event of any conflict, the full policy governs.

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