OE Quality
60-Day Returns

Denso 671-4088 Spark Plug Wire Set
Overview of Denso 7mm Spark Plug Wire Set 671-4088
The Denso 7mm Spark Plug Wire Set 671-4088 is designed specifically for select Volvo models, including the 740, 745, 760, 780, and 940. This ignition wire set ensures reliable electrical conductivity and durability for your vehicle's ignition system.
- Silicone spark plug boot material for heat resistance and flexibility
- 7.00 mm insulation outside diameter for optimal electrical insulation
- Female distributor coil end terminal type for secure connection
- Female spark plug end terminal type with 180-degree boot angle
- Includes four straight spark plug end boots
Detailed Product Features and Specifications
The Denso 7mm spark plug wire set features silicone boots that provide excellent resistance to heat and environmental factors, helping maintain performance under demanding conditions. The 7.00 mm insulation diameter offers effective protection against electrical interference and arcing. Both the distributor coil end and spark plug end terminals are female, ensuring compatibility with the ignition components of Volvo 740, 745, 760, 780, and 940 models. The spark plug end boots are angled at 180 degrees, which facilitates installation in tight engine compartments and helps maintain a secure connection. This set includes four straight spark plug end boots, matching the typical four-cylinder ignition setup in these Volvo vehicles.
About the Denso 7mm Brand Line
The Denso 7mm brand line focuses on ignition wire sets with a 7.00 mm insulation diameter, balancing durability and electrical performance. This line is engineered to meet the specific requirements of various vehicle makes and models, including Volvo, providing consistent ignition performance and reliable fitment. The 7mm wires are designed to withstand high temperatures and resist wear, making them suitable for long-term use in demanding automotive environments.
Applications and Common Issues Addressed
- Replacement for worn or damaged spark plug wires in Volvo 740, 745, 760, 780, and 940
- Eliminates misfires caused by poor electrical conductivity or insulation breakdown
- Prevents ignition system interference and electrical noise
- Resolves issues related to cracked or brittle spark plug boots
- Improves engine starting and overall ignition reliability
Installation Notes and Tips
When installing the Denso 671-4088 spark plug wire set, ensure that the female terminals are properly seated on both the distributor coil and spark plugs. The 180-degree spark plug end boots should be aligned to avoid stress on the wires. It is recommended to replace all wires simultaneously to maintain balanced ignition performance. Handle the silicone boots carefully to avoid damage during installation.
Quality Assurance and Warranty
Denso manufactures this spark plug wire set to meet OEM specifications for Volvo vehicles, ensuring reliable fit and function. The use of high-quality silicone and precise terminal construction supports long-term durability. While specific warranty details are not provided here, Denso products typically come with manufacturer-backed quality assurance to support customer confidence.
| Brand | Denso |
| Part Number | 671-4088 |
| Position | 7mm |
| Distributor Coil End Terminal Type | Female |
| Insulation Outside Diameter | 7.00 |
| Spark Plug Boot Material | Silicone |
| Spark Plug End Boot Degree | 180 |
| Spark Plug End Boot Quantity Straight | 4 |
| Spark Plug End Terminal Type | FEMALE |
This part fits 23 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 1995 | Volvo | 940 | N/A | Exc. Regina Ignition; 7mm |
| 1994 | Volvo | 940 | N/A | Exc. Regina Ignition; 7mm |
| 1993 | Volvo | 940 | N/A | 7mm |
| 1992 | Volvo | 740 | N/A | 7mm |
| 1992 | Volvo | 940 | N/A | 7mm |
| 1991 | Volvo | 740 | N/A | 7mm |
| 1991 | Volvo | 780 | N/A | 7mm |
| 1991 | Volvo | 940 | N/A | 7mm |
| 1990 | Volvo | 740 | N/A | 7mm |
| 1990 | Volvo | 760 | N/A | 7mm |
| 1990 | Volvo | 780 | N/A | 7mm |
| 1989 | Volvo | 740 | N/A | 7mm |
| 1989 | Volvo | 760 | N/A | 7mm |
| 1989 | Volvo | 780 | N/A | 7mm |
| 1988 | Volvo | 740 | N/A | 7mm |
| 1988 | Volvo | 760 | N/A | 7mm |
| 1987 | Volvo | 740 | N/A | 7mm |
| 1987 | Volvo | 760 | N/A | 7mm |
| 1986 | Volvo | 740 | N/A | 7mm |
| 1986 | Volvo | 760 | N/A | 7mm |
| 1985 | Volvo | 740 | N/A | 7mm |
| 1985 | Volvo | 745 | N/A | 7mm |
| 1985 | Volvo | 760 | N/A | 7mm |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.