|  | | | BMW E34 Ignition Tune-Up - Page 1 | Spark Plugs  | | Bosch Spark Plugs | | New spark plugs are a must for any good tune-up. Replace and check for abnormal pitting or charred plug ends. Also check each plug against each other. Any strange variations among plugs are a sure indicator that something is wrong with a particular cylinder. |
| | Bosch Spark Plugs | | PEL-W8LPR | Bosch Spark Plug, 6 Per Car, 525i (With M20 Engine)(1989-90), 535i (1989-92), Each | $2.30 |  | | 12-12-9-063-428-M14 | Bosch Spark Plug FR-7-LDC+ (Super Plus - Yttrium), 6 Per Car, 525i/Touring (With M50 Engine)(1991-95), 530i/Touring (1993-95), 540i (1993-95), Each |  |
| $4.75 | | 
12-12-0-141-871-M14 | Bosch "High Power" Spark Plug FGR-7-DQP (4417), BMW E34 530i, 530i Touring, 540i, Each
Brand: Bosch [Photo] | |
| $6.25 | | | 12-12-9-061-867-M14 | Bosch Spark Plug Y6DC, 6 Per Car, M5 (1991-93) | |
| $5.00 | | | Bosch Platinum 2 Spark Plugs | | Bosch Platinum2 plugs have double the amount of pure platinum versus Bosch Platinum in its center electrode, providing a longer performance life. Plus, two ground electrodes provide multiple spark paths, which allow the spark to find the most efficient spark path. Unlike conventional air gap spark plugs, Platinum2 plugs use surface air gap technology. The spark of a Platinum2 first travels over the surface of the insulator nose and then arcs across the air gap to a ground electrode for a longer spark, without increasing the voltage requirement. |
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4306-M14 | Bosch Platinum 2, 6 Per Car, 525i (With M20 Engine)(1989-90), 535i (1989-92), Each [Photo] | No Longer Available | |
4303-M14 | Bosch Platinum 2, 6 Per Car, 525i/Touring (With M50 Engine)(1991-95), 530i/Touring (1993-95), 540i (1993-95), Each [Photo] | |
| $4.75 | | | Bosch Platinum+4 Spark Plugs | | Bosch Platinum+4's revolutionary firing technology provides multiple spark paths delivering the most powerful spark you can buy. A unique four ground electrode design provides optimal access to the air/fuel mixture for the most efficient combustion and a longer performance life. Feel the difference with Bosch Platinum+4, guaranteed! |
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PEL-4478 | Bosch Platinum+4, 6 Per Car, 525i (With M20 Engine)(1989-90), 535i (1989-92), Each [Photo] | $7.35 | |
4417-M14 | Bosch Platinum+4, 6 Per Car, 525i/Touring (With M50 Engine)(1991-95), 530i/Touring (1993-95), 540i (1993-95), Each [Photo] | |
| $6.25 | | | NGK Spark Plugs | | NGK is the largest original equipment supplier of platinum spark plugs in the world. Companies like General Motors, Honda, Nissan, Toyota, and others all specify NGK Platinum Spark Plugs as standard equipment. |
| | NGK Spark Plugs | | 12-12-9-061-869-M220 | NGK Spark Plug, 6 Per Car, 525i (With M20 Engine)(1989-90), 535i (1989-92), Each
Brand: NGK [Photo] | |
| $4.25 | | 
12-12-9-064-619-M220 | NGK Spark Plug, 6 Per Car, 525i/Touring (With M50 Engine)(1991-95), 530i/Touring (1993-95), 540i (1993-95), Each
Brand: NGK [Photo] | |
| $8.00 | |
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