Volvo OEM spark plugs are the ONLY way to go. Best for your Volvo. Don't bother with off brand plugs. This are perfect for my 2001 and 2003 V70s. Provides optimum efficient & performance. Volvo of Phoenix is a reputable eBay vendor. Prices are always fair and reasonable.
These were the right parts for a tuneup which included original manufacturer's spark and top quality spark plug wires which exceeded the quality of those more commonly used.