1999 Volvo S70 2.4L Petrol · V835 LWU

Owners replacing sills on P80 cars (850, S70 and first-generation V70) describe right-hand sills that have simply disappeared behind the trim, with rust hiding in the box sections and chassis legs. The Volvo Owners' Club rust guide lists sill drain holes blocking and rot creeping forward to the front wing joint - the same failure pattern seen repeatedly on S70s at inspections. Structural corrosion in these areas is an MOT failure, and proper welding repairs run into four figures.

The S70 uses the same five-cylinder modular ignition as the late 850, and Volvo Owners' Club threads show owners chasing random misfires through cap, rotor, leads and finally the coil itself when a partial failure keeps the car running rough at low revs. The club’s ignition troubleshooting guide covers distributor shaft wear, amplifier (power stage) failure and Hall-sensor faults - all on this car - that leave you stranded after a hot soak. A methodical check with a spark tester sorts it for £150-£400 in most cases.

The S70 shares the 850's transverse five-cylinder petrol engines, which are interference designs: a snapped or jumped cambelt stops the engine and typically bends valves and damages pistons. Volvo specified cambelt and tensioner renewal at around 60,000-80,000 miles or five years, and Volvo Owners Club threads describe S70 owners renewing belts late, with tensioner and idler bearing wear the usual warning signs. Belt wear is hidden behind the timing covers, so a missing belt history is the main risk when buying a used S70.