Guide to Direct Ignition Coils for the 2004-2010 Rolls-Royce Phantom
Keep your Phantom's V12 engine running smoothly by understanding ignition coil failure and choosing the right replacement part.
- The 2004-2010 Phantom uses a BMW N73 V12 engine with 12 individual ignition coils.
- Before replacing coils for multiple misfires, always inspect the PCV valves, a common and cheaper failure point with identical symptoms.
- Due to high labor costs, it is strongly recommended to replace all 12 coils and spark plugs at the same time.
- Use only high-quality OEM (Bosch) or reputable OEM-supplier (Bremi) brands to ensure reliability and avoid repeat repairs.
Symptoms of a Failing Ignition Coil
Ignition coils operate in a high-heat, high-vibration environment and will eventually wear out. When a coil begins to fail on your Phantom's BMW-sourced N73 V12 engine, it can cause noticeable performance problems. Common signs include a rough idle, engine hesitation or stuttering, reduced power, and the Check Engine Light illuminating on your dashboard.
Important: Check PCV Valves Before Replacing Coils
A very common issue on the N73 engine is the failure of the PCV (Positive Crankcase Ventilation) valves. The symptoms of failed PCV valves, such as a rough idle and misfires on multiple cylinders, are nearly identical to those of failing ignition coils. Many owners have spent a significant amount of money replacing all 12 coils and spark plugs, only to find the problem was a pair of inexpensive PCV valves. If you are experiencing misfires on multiple cylinders (codes P0300-P0312), it is strongly recommended to have the PCV system inspected first.
🎬 Watch a diagnostic walkthrough of an N73 engine with multiple misfires.Choosing the Right Aftermarket Ignition Coil
While original coils are available from a Rolls-Royce dealer, high-quality aftermarket options can provide the same performance. Given the high labor cost for this job, it is not a part where you should compromise on quality for a small saving.
Tier 1: OEM & Premium Aftermarket Brands
This is the most recommended choice for a vehicle like the Phantom. These brands are known to be original equipment suppliers or meet the same strict standards.
- Bosch: Bosch is the Original Equipment Manufacturer (OEM) for the ignition coils used in the Phantom's N73 engine. Choosing Bosch ensures you get the exact same quality, fit, and performance as the factory part.
- Bremi: Bremi is a well-regarded German brand and has been an OEM supplier to BMW. They are known for producing reliable ignition components that serve as a strong alternative to the original part.
Tier 2: Standard Aftermarket Brands
These brands offer a functional replacement at a lower price point. While they can work, their long-term durability under the high heat of the V12 engine may be a concern.
- Prenco: Prenco is an aftermarket brand that produces a wide range of ignition parts. Forum discussions show mixed experiences; some users report success while others mention premature failures. Given the labor-intensive nature of the replacement, using a Tier 1 brand is a safer investment.
Pro Tip: Due to the extensive labor time, the small cost savings from a Tier 2 coil are minimal compared to the risk of another failure. We strongly advise using an OEM-quality brand like Bosch or a reputable OEM supplier like Bremi for this specific vehicle.
Cost to Replace Rolls-Royce Phantom Ignition Coils
The total cost is heavily influenced by the high labor time required to access all 12 coils, which can be an all-day job even for an experienced mechanic. 🎬 See the extensive labor required to service Phantom coils and plugs. The coils are located under several engine covers, and the rear cylinders are particularly difficult to reach.
| Part Type | Price Range (Per Coil) | Price Range (Set of 12) |
|---|---|---|
| New OEM (Bosch) | $60 - $120 | $720 - $1,440 |
| New Aftermarket (Bremi, Prenco) | $25 - $40 | $300 - $480 |
| Shop Labor | $329 - $592+ | |
Frequently Asked Questions (FAQ)
Should I replace all 12 ignition coils at once?
Yes, it is highly recommended. Ignition coils are wear items that have all been exposed to the same heat and mileage. If one has failed, others are likely to fail soon. Given the high labor cost, replacing all 12 coils and spark plugs at the same time is the most cost-effective approach to prevent future repairs.
How difficult is it to replace the ignition coils myself?
This is a difficult job not recommended for most DIY mechanics. The coils at the back of the V12 engine are very hard to reach and require significant disassembly of engine components. It is best left to a professional mechanic with experience working on BMW or Rolls-Royce V12 engines.
What causes ignition coils to fail?
The primary causes of failure are engine heat, vibration, and age. Additionally, oil leaks from the valve cover gaskets can seep into the spark plug tubes and damage the coils. Worn spark plugs can also put extra strain on the coils, leading to premature failure.
Are there any recalls for the ignition coils on my Phantom?
No, there are no specific recalls for ignition coils on the 2004-2010 Rolls-Royce Phantom. They are considered normal wear-and-tear maintenance items.
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Technical Specifications
OEM Part Numbers: 12138616153 12137594937 12137575010 12137571643 12137562744 12137551049 12131712219 12135A06753
This vehicle uses 12 individual coil-on-plug ignition coils. The engine is a BMW N73 V12, and coils are shared with the 2003-2008 BMW 760i/Li.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Rolls-Royce Phantom:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Symptoms of a Failing Ignition Coil
- Important: Check PCV Valves Before Replacing Coils
- Choosing the Right Aftermarket Ignition Coil
- Tier 1: OEM & Premium Aftermarket Brands
- Tier 2: Standard Aftermarket Brands
- Cost to Replace Rolls-Royce Phantom Ignition Coils
- Frequently Asked Questions (FAQ)
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