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          Bosch 18145 - Oxygen Sensor

          MPN: 18145
          The Bosch 18145 Oxygen Sensor measures exhaust oxygen levels, ensuring optimal fuel efficiency and reduced emissions in select Fiat models. Engineered for precise fitment.
          0.0
          Vehicle Specific
          Check if this part fits your vehicle.
          • $74.95
          In stock

          Product Overview

          The Bosch 18145 Oxygen Sensor is an essential component of your vehicle's emissions system. It accurately measures the oxygen levels in the exhaust gases and sends this vital information to the engine control unit (ECU). This allows for precise adjustments to the fuel-to-air ratio, enhancing engine performance while minimizing emissions. Designed for models such as the Fiat 500L and 500X, this part ensures OE-level quality, reliability, and fitment accuracy. Choose Bosch 18145 for dependable performance and peace of mind every time you service your vehicle.

          Cross Reference Numbers

          This Bosch 18145 is equivalent to or replaces the following part numbers:

          Vehicle Compatibility

          • Fiat 500L 1.4 L4 (2014–2020)
          • Fiat 500X 1.4 L4 (2015–2018)

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

          Why Shop at eEuroparts.com?

          • Proven Expertise: Over 25 years of experience with European vehicles means we know your car inside and out.
          • Exclusive Kits That Fitâ„¢ - complete repair solutions with no guesswork
          • Fitment Confidence: Our accurate cataloging ensures you get the right part the first time.
          • Fast, Reliable Shipping: Orders ship quickly from our U.S.-based warehouses.
          • Transparent Pricing: Competitive prices with no hidden fees or surprise charges.
          • Established Trust: Serving the European auto community since 2000.

          Frequently Asked Questions

          What does the Bosch 18145 Oxygen Sensor do?

          The Bosch 18145 Oxygen Sensor plays a crucial role in your vehicle's emissions system. It measures the level of oxygen in the exhaust gases and sends this information to the engine control unit (ECU), allowing it to adjust the fuel-to-air ratio for optimal engine performance and reduced emissions.

          How do I know if my Oxygen Sensor needs replacement?

          Common symptoms of a failing oxygen sensor include poor fuel economy, increased emissions, rough engine idle, and the illumination of the check engine light. If you experience any of these issues, it may be time to replace your oxygen sensor.

          Can I install the Bosch 18145 myself?

          Yes, you can install the Bosch 18145 Oxygen Sensor yourself if you have basic automotive knowledge and tools. However, ensure to follow proper safety precautions and consult your vehicle’s service manual for specific installation instructions.

          What are the symptoms of a faulty Oxygen Sensor?

          Symptoms of a faulty oxygen sensor include decreased fuel efficiency, increased exhaust emissions, and rough engine performance. If you see DTCs such as P0131, P0132, P0133, or P0134, it may indicate a failing oxygen sensor.

          Why should I choose Bosch for my Oxygen Sensor needs?

          Bosch is a trusted brand known for its high-quality automotive components. The Bosch 18145 Oxygen Sensor offers factory-correct replacement that restores safety and performance. Order Bosch 18145 today for a reliable solution to your vehicle's emissions system.

          Note: All information on this page and in the FAQ is for general reference only. Verify fitment and consult a professional as needed. eEuroparts.com is not responsible for incorrect part selection or installation.

            • eEuroparts SKU
              236792
            • Weight
              0.3814 lbs
            • Dimensions (L x W x H)
              2.2047 x 1.9685 x 5.8268 in
            • Barcode
              00077212198344
            • Manufacturer Part #
              18145
          • Brand
            Bosch
          • Manufacturer
            Bosch
          • MPN
            18145
          • Part Type
            Oxygen Sensor
          • OE Part Numbers
            68142340AA, 68254612AA
          • Features
            Additional Accessories Included : No
            Automotive Color / Finish : Steel
            Automotive Item Weight (lbs) : 0.330693 lb
            Connector Gender : Male
            Connector Shape : Oblong
            Grade Type : Regular
            Heated (Oxygen Sensor) : Yes
            Hex Size (Oxygen Sensor) : 22 mm
            Housing Material : Metal
            Length (Sealing Surface To End Of Connector) : 12.4015748031496 in
            Mounting Bracket Included : No
            Mounting Type : Threaded
            Overall Length : 13.5826771653543
            Oxygen Sensor Type : Narrow-band heated
            Prop 65 Warning Label Required? : No
            Sensor Type : Heated
            Terminal Gender : Male
            Terminal Quantity : 4
            Terminal Type : Blade
            Thread Diameter : 18
            Thread Size : 18
            Universal Or Specific Fit : Specific
            Wire Length : 295 in
            Wire Quantity : 4
            Wiring Harness Included : Yes
            Wiring Harness Length : 295
          • Fitment
            • Fitment Type
              Vehicle Specific
          YearMakeModelSubmodelNotes
          2014Fiat500LEasy (1.4 L4 GAS)Position: Upstream, Position: Downstream
          2014Fiat500LLounge (1.4 L4 GAS)Position: Upstream, Position: Downstream
          2014Fiat500LPop (1.4 L4 GAS)Position: Upstream, Position: Downstream
          2014Fiat500LTrekking (1.4 L4 GAS)Position: Upstream, Position: Downstream
          2015Fiat500LEasy (1.4 L4 GAS)Position: Upstream, Position: Downstream
          2015Fiat500LLounge (1.4 L4 GAS)Position: Upstream, Position: Downstream
          2015Fiat500LPop (1.4 L4 GAS)Position: Upstream, Position: Downstream
          2015Fiat500LTrekking (1.4 L4 GAS)Position: Upstream, Position: Downstream
          2015Fiat500LUrbana (1.4 L4 GAS)Position: Upstream, Position: Downstream
          2016Fiat500LEasy (1.4 L4 GAS)Position: Upstream, Position: Downstream
          2016Fiat500LLounge (1.4 L4 GAS)Position: Upstream, Position: Downstream
          2016Fiat500LPop (1.4 L4 GAS)Position: Upstream, Position: Downstream
          2016Fiat500LTrekking (1.4 L4 GAS)Position: Upstream, Position: Downstream
          2016Fiat500LUrbana (1.4 L4 GAS)Position: Upstream, Position: Downstream
          2016Fiat500XPop (1.4 L4 GAS)Position: Downstream
          2017Fiat500LLounge (1.4 L4 GAS)Position: Downstream
          2017Fiat500LPop (1.4 L4 GAS)Position: Downstream
          2017Fiat500LTrekking (1.4 L4 GAS)Position: Downstream
          2017Fiat500LUrbana (1.4 L4 GAS)Position: Downstream
          2017Fiat500XPop (1.4 L4 GAS)Position: Downstream
          2018Fiat500LLounge (1.4 L4 GAS)Position: Downstream
          2018Fiat500LPop (1.4 L4 GAS)Position: Downstream
          2018Fiat500LTrekking (1.4 L4 GAS)Position: Downstream
          2018Fiat500XPop (1.4 L4 GAS)Position: Downstream
          2020Fiat500LLounge (1.4 L4 GAS)Position: Downstream
          2020Fiat500LPop (1.4 L4 GAS)Position: Downstream
          2020Fiat500LTrekking (1.4 L4 GAS)Position: Downstream
          2020Fiat500LUrbana (1.4 L4 GAS)Position: Downstream
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          Warranty Overview

          At eEuroparts, 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, contact customer support via Chat or Contact Us.

          • 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 complete details, please see our full 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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