Accumulator Failure (PCC II)
SeriousSuspension & ChassisThe nitrogen-filled hydraulic accumulators that manage roll and pitch eventually fail, leading to a harsh ride and suspension warnings.
Est. Repair Cost: £1,500–£2,200
Reliability GuideCommon Problems with the
Common Problems with the
2017 McLaren 720S / 765LT
The 720S launched as McLarens Super Series flagship, featuring a 4.0-litre twin-turbo V8 producing 710bhp. These early cars are the most affordable but carry the same PCC accumulator concerns as previous models. The 720S benefited from the second-generation PCC system.
What changed for 2017
- •UK launch of 720S
- •4.0-litre twin-turbo V8
- •PCC II suspension system
Common MOT watch-outs
- !PCC II accumulator failure
- !Paint bubbling from aluminium oxidation
- !IRIS infotainment glitches
3
Known Issues
1
Serious
1
Moderate
1
Minor
All Known Issues
Stress Cracks in Gorilla Glass
ModerateBodywork & RustThe specialized lightweight glass used for the upper door sections and pillars can develop stress cracks.
Est. Repair Cost: £1,500–£3,000 per panel
Panel Alignment and Trim Gaps
MinorBodywork & RustEarlier production cars occasionally show inconsistent panel gaps, especially around the front trunk (frunk) and rear deck.
Est. Repair Cost: £500–£1,500 (Adjustment)
Buying Tips for 2017 McLaren 720S / 765LT
- ✓Check the PCC II accumulators for wear
- ✓Inspect the paintwork for bubbling
- ✓Verify the IRIS system is responsive