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          Bosch 7909 - Spark Plug

          MPN: 7909
          The Bosch 7909 Spark Plug is essential for optimal engine function, igniting the air-fuel mixture for reliable power and efficiency. Designed for long-lasting performance.
          0.0
          Vehicle Specific
          Check if this part fits your vehicle.
          • $1.95
          In stock

          Product Overview

          The Bosch 7909 Spark Plug is designed to provide exceptional ignition performance and reliability for your BMW vehicle. Engineered with yttrium-enhanced center electrodes, these spark plugs ensure longevity and superior ignition capability, making them critical for optimal engine function. As a vital component in the combustion process, spark plugs ignite the air-fuel mixture, directly impacting your vehicle's power and efficiency. Choose Bosch 7909 for dependable performance and peace of mind every time you service your vehicle.

          Cross Reference Numbers

          This Bosch 7909 is equivalent to or replaces the following part numbers: 12 12 9 061 869, 12129061869.

          Vehicle Compatibility

          • BMW 325i 2.5 L6 (1989–1993)
          • BMW 325is 2.5 L6 (1989–1993)
          • BMW 325iX 2.5 L6 (1989–1993)
          • BMW 535i 3.5 L6 (1988–1993)
          • BMW 735i 3.5 L6 (1988–1993)
          • BMW 735iL 3.5 L6 (1988–1993)
          • BMW 525i 2.5 L6 (1990)
          • BMW 635CSi 3.5 L6 (1988–1989)
          • BMW 325e 2.7 L6 (1985–1986)
          • BMW 528e 2.7 L6 (1983–1988)

          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 7909 Spark Plug do?

          The Bosch 7909 Spark Plug ignites the air-fuel mixture in the engine's combustion chamber, enabling the engine to produce power and operate efficiently. A functioning spark plug is essential for maintaining engine performance and fuel efficiency.

          How do I know if my Spark Plug needs replacement?

          Common signs of a failing spark plug include engine misfires, rough idling, reduced fuel efficiency, difficulty starting the engine, and a noticeable decrease in overall performance.

          Can I install the Bosch 7909 myself?

          Yes, the Bosch 7909 Spark Plug can be installed by those with basic automotive knowledge. Ensure you take the necessary precautions to avoid damaging the threads or the ignition system during installation.

          What are the symptoms of a faulty Spark Plug?

          Symptoms of a faulty spark plug include engine misfires, rough idle, poor acceleration, and increased fuel consumption. If you experience these issues, it is advisable to check your spark plugs for wear or damage.

          Why should I choose Bosch for my Spark Plug needs?

          Bosch is a trusted brand known for its quality and performance in automotive parts. Order Bosch 7909 today for a factory-correct replacement that restores safety and performance.

          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
              235086
            • Weight
              0.1323 lbs
            • Dimensions (L x W x H)
              0.9449 x 1.063 x 3.5039 in
            • Barcode
              4047023256447
            • Manufacturer Part #
              7909
          • Brand
            Bosch
          • Manufacturer
            Bosch
          • MPN
            7909
          • Part Type
            Spark Plug
          • OE Part Numbers
            12 12 9 061 869, 12129061869, 12 12 1 714 751, 12121714751
          • Cross Reference Numbers
            WR8LC, 0 242 229 779, 0242229779, 7509, 7909
          • Features
            Center Electrode Design : Standard
            Electrical Terminal Type : Removable Nut
            Ground Configuration : Standard
            Ground Electrode Core Material : N/A
            Ground Electrode Quantity : 1
            Ground Electrode Tip Design : Tapered v-profile
            Hex Size : 20.8
            Hex Type : Hex
            Indexed : No
            Insulator Material : Ceramic
            Insulator Type : Projected
            Manufacturer Heat Range : 8
            Outdoor Power Equipment Application : No
            Package Contents : Spark Plug
            Package Quantity : 1
            Pre-Gap Size : .8
            Product Length : 3.244094 in
            Product Width : 0.937008 in
            Prop 65 Warning Label Required? : No
            Reach : 19
            Resistance : 6000
            Resistor : Yes
            Resistor Type : Yes
            Seat Type : Flat
            Short Style : No
            Spark Plug Type : 4-Cycle
            Thread Diameter : 14
          • Fitment
            • Fitment Type
              Vehicle Specific
          YearMakeModelSubmodelNotes
          1987BMW325iBase (2.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1987BMW325isBase (2.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1987BMW528eBase (2.7 L6 GAS)Notes: To 12/1986, From 01/1987, Original Center Electrode Material is Silver, Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1987BMW735iBase (3.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1987BMWL7Base (3.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1987BMW325Base (2.7 L6 GAS)Notes: Original Center Electrode Material is Silver
          1987BMW325eBase (2.7 L6 GAS)Notes: Original Center Electrode Material is Silver
          1987BMW535iBase (3.5 L6 GAS)Notes: Original Center Electrode Material is Silver
          1987BMW635CSiBase (3.5 L6 GAS)Notes: Original Center Electrode Material is Silver
          1987BMWL6Base (3.5 L6 GAS)Notes: Original Center Electrode Material is Silver
          1987BMW325esBase (2.7 L6 GAS)Notes: Original Center Electrode Material is Silver
          1988BMW325iBase (2.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1988BMW325isBase (2.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1988BMW325iXBase (2.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1988BMW528eBase (2.7 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1988BMW535iBase (3.5 L6 GAS)Notes: Gap 0.028 in, Late Production, Early Production, Original Center Electrode Material is Silver, Original Center Electrode Material is Copper/Nickel
          1988BMW535isBase (3.5 L6 GAS)Notes: Gap 0.028 in, Early Production, Original Center Electrode Material is Silver, Late Production, Original Center Electrode Material is Copper/Nickel
          1988BMW735iBase (3.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1988BMW735iLBase (3.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1988BMW325Base (2.7 L6 GAS)Notes: Original Center Electrode Material is Silver
          1988BMW635CSiBase (3.5 L6 GAS)Notes: Original Center Electrode Material is Silver
          1989BMW325iBase (2.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1989BMW325isBase (2.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1989BMW325iXBase (2.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1989BMW525iBase (2.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1989BMW535iBase (3.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1989BMW735iBase (3.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1989BMW735iLBase (3.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1989BMW635CSiBase (3.5 L6 GAS)Notes: Original Center Electrode Material is Silver
          1990BMW325iBase (2.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1990BMW325isBase (2.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1990BMW325iXBase (2.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1990BMW525iBase (2.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1990BMW535iBase (3.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1990BMW735iBase (3.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1990BMW735iLBase (3.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1991BMW325iBase (2.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1991BMW325isBase (2.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1991BMW325iXBase (2.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1991BMW535iBase (3.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1991BMW735iBase (3.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1991BMW735iLBase (3.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1992BMW535iBase (3.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1992BMW735iBase (3.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1992BMW735iLBase (3.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1993BMW535iBase (3.5 L6 GAS)Notes: Gap 0.028 in, Original Center Electrode Material is Copper/Nickel
          1984BMW325eBase (2.7 L6 GAS)Notes: Original Center Electrode Material is Silver
          1984BMW528eBase (2.7 L6 GAS)Notes: Original Center Electrode Material is Silver
          1984BMW533iBase (3.2 L6 GAS)Notes: Original Center Electrode Material is Silver
          1984BMW633CSiBase (3.2 L6 GAS)Notes: Original Center Electrode Material is Silver
          1984BMW733iBase (3.2 L6 GAS)Notes: Original Center Electrode Material is Silver
          1985BMW325eBase (2.7 L6 GAS)Notes: Original Center Electrode Material is Silver
          1985BMW528eBase (2.7 L6 GAS)Notes: Original Center Electrode Material is Silver
          1985BMW535iBase (3.5 L6 GAS)Notes: Original Center Electrode Material is Silver
          1985BMW635CSiBase (3.5 L6 GAS)Notes: Original Center Electrode Material is Silver
          1985BMW735iBase (3.5 L6 GAS)Notes: Original Center Electrode Material is Silver
          1986BMW325eBase (2.7 L6 GAS)Notes: Original Center Electrode Material is Silver
          1986BMW528eBase (2.7 L6 GAS)Notes: Original Center Electrode Material is Silver
          1986BMW535iBase (3.5 L6 GAS)Notes: Original Center Electrode Material is Silver
          1986BMW635CSiBase (3.5 L6 GAS)Notes: Original Center Electrode Material is Silver
          1986BMW735iBase (3.5 L6 GAS)Notes: Original Center Electrode Material is Silver
          1986BMWL7Base (3.5 L6 GAS)Notes: Original Center Electrode Material is Silver
          1986BMW325esBase (2.7 L6 GAS)Notes: Original Center Electrode Material is Silver
          1986BMW325Base (2.7 L6 GAS)Notes: Original Center Electrode Material is Silver
          1982BMW528eBase (2.7 L6 GAS)Notes: Original Center Electrode Material is Silver
          1982BMW633CSiBase (3.2 L6 GAS)Notes: Original Center Electrode Material is Silver
          1982BMW733iBase (3.2 L6 GAS)Notes: Original Center Electrode Material is Silver
          1983BMW528eBase (2.7 L6 GAS)Notes: Original Center Electrode Material is Silver
          1983BMW533iBase (3.2 L6 GAS)Notes: Original Center Electrode Material is Silver
          1983BMW633CSiBase (3.2 L6 GAS)Notes: Original Center Electrode Material is Silver
          1983BMW733iBase (3.2 L6 GAS)Notes: Original Center Electrode Material is Silver
          1980BMW633CSiBase (3.2 L6 GAS)Notes: Original Center Electrode Material is Silver
          1980BMW733iBase (3.2 L6 GAS)Notes: Original Center Electrode Material is Silver
          1981BMW633CSiBase (3.2 L6 GAS)Notes: Original Center Electrode Material is Silver
          1981BMW733iBase (3.2 L6 GAS)Notes: Original Center Electrode Material is Silver
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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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