This Bentley Mulsanne came in because the powered boot would not lift up on its own. We traced it to failed boot motors and the tailgate control unit, and also replaced the two boot dampers and their brackets. All with original Bentley parts.
Job completed: June 2026
| Car | Bentley Mulsanne |
|---|---|
| Symptom | The powered boot would not lift up automatically |
| Fault found | Failed rear boot electric motors and a faulty tailgate control unit. The two boot dampers and their brackets also needed replacing |
| Repair done | Replaced both boot motors, the tailgate control unit and both boot dampers with their brackets, then coded and road tested |
| Parts | Original Bentley parts |
| Time taken | About 1.5 days |
| Cost | Around $10,000 before GST |
| Warranty | At least 6 months on the electrical repair |
The owner had a Bentley Mulsanne with a powered boot that would not lift up on its own. On a car like this the boot is meant to glide open at the touch of a button. Instead it was not opening properly, which on a luxury saloon is both annoying and not how the car is supposed to feel.
The Bentley Mulsanne is a hand-built flagship saloon, and almost everything on it is powered and electronically controlled. The boot is no exception. It uses electric motors to lift and close the lid, with a tailgate control unit that tells the motors what to do and reads the boot's position.
That convenience comes with complexity. When a powered boot stops working, the fault can sit in the motors, in the control unit, in the wiring, or in the sensors. On a marque like Bentley the parts are specific to the car, so it is not a part you swap on a guess. You diagnose first, then order the right original parts.
We started by checking the boot. The two rear boot electric motors had failed, and the tailgate control unit was faulty, so the boot had no reliable way to lift itself. The two boot dampers and their brackets needed replacing as well.
We showed the owner what needed replacing and sent a written quote before ordering anything.
A powered boot does a lot of work over the years. Every open and close runs the motors and cycles the control unit. Over time the motors wear out and the control electronics can fail, especially on an older flagship that has opened its boot thousands of times.
Singapore's heat and humidity do not help electrical components. Heat is hard on motors and control units. None of this is a fault with the car so much as parts reaching the end of their life. On a Bentley the fix is to replace the worn parts with the correct original components and set them up properly, not to bodge a workaround.
Once the owner approved, we ordered the original Bentley parts and did the job properly rather than patching it.
With the new motors and control unit fitted and coded, the powered boot lifted and closed smoothly again. We finished the job in about a day and a half. The full job came to around $10,000 before GST, including the original parts and labour.
This Bentley Mulsanne job came to around $10,000 before GST for both boot motors, the tailgate control unit, both boot dampers with brackets, coding and labour, all with original Bentley parts.
What moves the price is how much has actually failed. If only one motor is gone and the control unit is fine, the job is smaller. Here both motors, the control unit and the boot dampers all needed replacing. This is why we diagnose first and quote for exactly what is faulty, so you are not paying for parts the car does not need.
A powered boot is mostly down to fair wear over the years, but a few habits help. If the boot starts opening slowly, hesitating, or stopping part way, get it checked early rather than forcing it. A motor that is on its way out puts more strain on the control unit, so catching it early can keep a one-part job from becoming a several-part job.
On a car like a Bentley, using the correct original parts and setting them up properly is what keeps everything behaving the way it was built to.
This Bentley Mulsanne (Electric boot motor and tailgate control unit repair) was handled at 1 Car Service, an independent workshop in Sin Ming AutoCity, Singapore. The work is backed by a warranty of at least 6 months. We hold a 4.9★ rating from 1,836+ Google reviews.
WhatsApp us your car model and what is happening. We diagnose the real fault first and quote before any work begins.
It depends on what has failed. This Bentley Mulsanne job, which covered both boot motors, the tailgate control unit, and both boot dampers and brackets, came to around $10,000 before GST. We diagnose first and quote for exactly what is faulty.
On a powered boot, the fault is usually in the boot motors, the tailgate control unit, the wiring or the sensors. On this Mulsanne both rear boot motors had failed and the control unit was faulty, so the boot had no reliable way to lift itself. It needs proper diagnosis to pin down which part is the problem before any part is ordered.
Yes. For this job we used original Bentley parts for the boot motors, the tailgate control unit and the boot dampers, then coded and set up the new motors and control unit so the boot worked as the factory intended. On a marque like Bentley the parts are specific to the car, so fitting the correct original components matters.
Yes. This electrical repair carries at least 6 months of warranty. We confirm the warranty for your specific job when we quote, so you know what is covered before any work begins.
Once the original parts were in, this Bentley Mulsanne was done in about a day and a half, including the boot motors, the tailgate control unit, both boot dampers, coding and the road test. Some parts can take a few weeks to order in, so the timeline depends on parts availability. We confirm the timing once we have diagnosed the car and ordered the parts.
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