JAGUAR 640.JA1S00 Trunk Lock Actuator GNA2551BF
fits model: Xj8, Xj. make: Jaguar. year: 1998–2003.
( Part Type: Trunk Actuator Lock ), ( Conditions Options: Rear Trunk Latch Actuator Assy ), ( Genuine Oem: Yes ), ( Ipn: 640.ja1s00 ), ( Year: 2000 ), ( Oe/oem Part Number: Gna2551bf )
Review JAGUAR Trunk Lock Actuator Assy Oem Used fits XJ8 XJ 1998–2003
The **Jaguar XJ8 (XJ6) Trunk Lock Actuator (GNA2551BF)** from the **1998 2003 model years**, specifically part number **JA1S00**, is a precision-engineered component designed to ensure seamless and reliable operation of the rear hatch mechanism on Jaguar s iconic luxury sedans. This actuator is a critical part of the vehicle s trunk release system, integrating with the factory wiring harness to provide smooth, silent engagement and disengagement of the trunk latch, whether activated manually or via the keyless entry remote. Crafted for the **XJ8 (XJ6) platform**, which blends the timeless elegance of Jaguar s classic design with modern engineering, this actuator is built to withstand the demands of daily use while maintaining the vehicle s refined performance and aesthetic appeal. The **GNA2551BF** is a direct-fit replacement, meticulously designed to match the original equipment specifications, ensuring compatibility with the **1998 2003 XJ8 (XJ6) models**, including variants like the **XJ8, XJ6, and XJ6S**, without the need for modifications. Constructed from high-quality materials, this actuator features a robust motor and durable internal components that resist wear, corrosion, and electrical interference, guaranteeing long-term reliability even in varying environmental conditions. Whether replacing a failed original unit or upgrading for enhanced durability, this actuator delivers the precision and quiet operation expected from Jaguar s luxury engineering. Its seamless integration with the vehicle s electrical system ensures that the trunk operates smoothly, whether unlocked via the key fob, interior panel, or manual override, upholding the car s reputation for effortless sophistication. Ideal for both restoration projects and routine maintenance, this part is a testament to Jaguar s commitment to blending heritage design with cutting-edge functionality.
### **Pros and Cons of Buying a Jaguar XJ8 (JA1S00, 1998 2003) Trunk Lock Actuator (GNA2551BF)**
#### **Pros**
1. **Common and Widely Available** The GNA2551BF trunk lock actuator is a standard part for the Jaguar XJ8 (JA1S00) series, meaning it can be sourced from multiple suppliers, including Jaguar dealers, aftermarket parts stores, and online retailers. This reduces the risk of long wait times or exclusivity issues.
2. **Relatively Affordable** Compared to some high-end Jaguar components, this actuator is reasonably priced, typically ranging between $50 and $150 depending on the source (new or refurbished). This makes it a cost-effective repair for owners looking to avoid a full trunk mechanism overhaul.
3. **Easy to Install** The actuator is a modular component that plugs into the existing wiring harness and mounts to the trunk lid mechanism. While some basic mechanical knowledge is helpful, installation is straightforward for those with basic automotive experience or access to a Jaguar repair guide.
4. **Prevents Further Damage** A faulty trunk lock actuator can cause the trunk to remain open, leading to water damage, dirt accumulation, or even the actuator itself seizing. Replacing it early avoids more extensive (and costly) repairs to the trunk mechanism or surrounding components.
5. **Aftermarket Support** Due to the model s popularity, there are aftermarket alternatives (e.g., remanufactured or upgraded actuators) that may offer better durability or compatibility with modifications. This provides flexibility if the original part proves unreliable.
6. **Minimal Long-Term Impact** Unlike engine or transmission issues, a trunk actuator failure is purely functional and does not affect performance, fuel efficiency, or drivability. Fixing it restores normal operation without trade-offs.
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#### **Cons**
1. **Potential for Recurring Issues** Some units, especially cheaper aftermarket replacements, may fail prematurely due to poor quality control. This can lead to repeated replacements if the actuator is not properly maintained or if the original failure was caused by a deeper issue (e.g., corroded wiring, worn-out springs, or a faulty trunk latch).
2. **Wiring or Electrical Problems** If the actuator fails shortly after replacement, the issue might not be the part itself but rather:- Corroded or damaged wiring in the harness.
- A failing trunk latch or mechanical linkage that puts excessive strain on the actuator.
- A faulty ground or power source in the vehicle s electrical system.
Diagnosing these requires troubleshooting beyond just replacing the actuator.
3. **Compatibility Concerns** While the GNA2551BF is the correct part for the JA1S00 XJ8, some aftermarket or refurbished units may not fit perfectly due to manufacturing variations. This could require adjustments during installation or even a return if the part is defective.
4. **Limited Lifespan** Like many electrical actuators, this component can wear out over time, especially if the trunk is frequently opened/closed or exposed to harsh conditions (e.g., salt, moisture). Owners in extreme climates may experience shorter lifespan than average.
5. **DIY Risk for Inexperienced Owners** While the installation is manageable, those without mechanical or electrical experience may struggle with:
- Disconnecting the trunk mechanism safely.
- Ensuring proper alignment of the actuator with the linkage.
- Testing the new actuator without causing further damage (e.g., accidentally triggering the alarm or damaging the latch).
Professional installation may be advisable for first-time DIYers.
6. **No Warranty on Aftermarket Parts** Purchasing from non-OEM suppliers means losing the original manufacturer s warranty. If the actuator fails within a short period, the buyer bears the cost of replacement, whereas an OEM part might come with a limited warranty.
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### **Conclusion**
The **GNA2551BF trunk lock actuator** for the Jaguar XJ8 (JA1S00, 1998 2003) is a **practical and cost-effective repair** for a common failure point in these vehicles. Its availability, ease of installation, and affordability make it a sound choice for owners experiencing trunk lock issues. However, the **potential for electrical or mechanical underlying problems** and the **risk of premature failure with low-quality parts** require due diligence.
To mitigate risks:- **Buy from a reputable supplier** (preferably OEM or a well-reviewed aftermarket brand).
- **Inspect wiring and the trunk latch mechanism** before replacing the actuator to rule out other causes.
- **Consider professional installation** if unsure about handling the trunk mechanism or electrical components.
- **Test the actuator thoroughly** after installation to ensure proper function.
### **Recommendation**
**Proceed with purchasing and replacing the actuator** if the failure is isolated to the part itself and no other symptoms (e.g., electrical gremlins, unusual noises, or trunk misalignment) are present. For owners comfortable with basic repairs, this is a **quick and inexpensive fix** that restores functionality without major trade-offs.
If the trunk lock issue persists after replacement, **diagnose further electrical or mechanical issues** (e.g., corroded connectors, worn springs, or a faulty latch) before assuming the actuator is the sole culprit. In cases where the problem recurs frequently, a **full trunk mechanism inspection** may be warranted to identify systemic wear.
For those without mechanical experience, **consult a Jaguar specialist** to ensure the repair is done correctly and to address any hidden issues that could lead to repeated failures.
Details:
1998 2003 JAGUAR XJ XJ8 TRUNK LOCK ACTUATOR ASSY OEM USED GNA2551BF. Condition is Used. Shipped with USPS Ground Advantage.
part #: 640.ja1s00 prices
- $54.39-$180.70
specifications trunklipa:
- for models: Xj8, Xj
- for makes: Jaguar
- for years: 1998-2003
- part type: Trunk Actuator Lock
- conditions options: Rear Trunk Latch Actuator Assy
- genuine oem: Yes
- ipn: 640.ja1s00
- year: 2000
- oe/oem part number: Gna2551bf
payments trunklipa:
- other
- credit card: Diners-club
- wallet: Apple-pay
offer trunklipa:
- sold: 0
- options: Ship-to-home
- availability: In Stock
- started: March 19, 2026
- best offers: True
- quantity: 2
general trunklipa:
- condition: Used
- Exterior Parts Accessories > doors, Trunk Lids Hatches > Hatches Trunk Lids
returns trunklipa:
- policy: No Returns
seller trunklipa:
- rating: 99.0%
- city: Schererville, Indiana
- # reviews: 225
shipping trunklipa:
- carrier: USPS
- transit: 5-11 Days
- type: Calculated
- class: Standard, Expedited
- service: USPS Ground Advantage, USPS Priority Mail
- cost: $8.87
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