IsItAGoodCar
Reliability Guide

Common Problems with the
1999 TVR Tuscan / Tamora / T350 / Sagaris

The TVR Tuscan Speed Six debuted in 1999, introducing TVR's own straight-six engine to replace the Rover V8 in the flagship model. Available as a coupé with either 3.6L or 4.0L Speed Six engines, it offered staggering performance but early cars were plagued by finger follower wear and oiling issues that could lead to catastrophic engine failure.

What changed for 1999

  • •Tuscan Speed Six launched with TVR's in-house 3.6L/4.0L straight-six
  • •Replaced Rover V8 as the flagship powertrain
  • •Bespoke LCD dashboard introduced
  • •No electronic aids—no ABS, traction control, or airbags

Common MOT watch-outs

  • !Speed Six finger follower wear—catastrophic if not addressed
  • !Chassis outrigger corrosion begins
  • !Electrical gremlins in bespoke wiring looms
4
Known Issues
3
Serious
1
Moderate
0
Minor

All Known Issues

Speed Six Finger Follower Wear

SeriousEngine

Inadequate lubrication or metallurgy in early Speed Six engines caused the finger followers to wear flat, leading to engine failure.

Est. Repair Cost: £4,000–£8,000 (Full rebuild)
Warning Signs:

Loss of power, Metallic debris in oil, Tapping noise

What to Inspect:
  • Look for invoices from specialists like Powers Performance (Red Rose/Gold Seal).
  • Perform an oil analysis if possible.
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Diff Mount Failure

SeriousSuspension & Chassis

The rear differential mounting points on the chassis can crack under the torque of the Speed Six engine.

Est. Repair Cost: £500–£1,200
Warning Signs:

Clunking from the rear during gear shifts, Vibration at speed

What to Inspect:
  • Inspect the differential mounting brackets for hairline cracks.
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Diff Mount Failure

SeriousSuspension & Chassis

The rear differential mounting points on the chassis can crack under the torque of the Speed Six engine.

Est. Repair Cost: £500–£1,200
Warning Signs:

Clunking from the rear during gear shifts, Vibration at speed

What to Inspect:
  • Inspect the differential mounting brackets for hairline cracks.
Verified by IsItAGoodCar Research Team

Digital Dash (LCD) Failure

ModerateElectrics & Electronics

The bespoke LCD instrument clusters are prone to fading, bleeding, or total failure due to heat and vibration.

Est. Repair Cost: £400–£800
Warning Signs:

Unreadable gauges, Flickering display, Total black-out

What to Inspect:
  • Check the display clearly when the interior is hot (after a drive).
Verified by IsItAGoodCar Research Team

Buying Tips for 1999 TVR Tuscan / Tamora / T350 / Sagaris

  • Verify whether a Speed Six top-end rebuild has been performed by a specialist
  • Check the digital dashboard for missing segments or fading
  • Get a chassis-up inspection on a ramp—outrigger rot is hidden by bodywork
2000–2004
Check a 1999 TVR Tuscan / Tamora / T350 / Sagaris by Registration