The Range Rover 3.0 TDV6 engine replacement cost UK is between £3,850 for a reconditioned 306DT supply and fit on a Range Rover Sport L494 and £6,500 or more on a Range Rover Vogue L405 with 30DDTX engine code.
The 3.0 TDV6 family (306DT, 30DDTX and 30HD0D) is used in the Range Rover Sport L320 and L494, Range Rover Vogue L405, Land Rover Discovery 4 and Land Rover Discovery 5. The labour time and ancillary costs for each chassis are different, and the TDV6 engine replacement cost varies significantly between models with the same engine code.
TDV6 Engine Replacement Cost by Model and Engine Code:
The 306DT engine replacement cost and its variants depend on which chassis the engine sits in. A 306DT in a Discovery 4 comes out faster than the same code in a Range Rover Sport L494.
Different ancillary positions, different subframe configurations and different ECU (Engine Control Unit) pairing requirements all affect labour time and total cost.
| Model | Chassis | Engine Code | Used Engine + Fit | Reconditioned + Fit | New OEM + Fit |
| Range Rover Sport (2005–2013) | L320 | 30DDTX | £2,500–£3,800 | £3,900–£5,500 | £9,500–£13,000 |
| Range Rover Sport (2013–2022) | L494 | 306DT / 30DDTX | £2,800–£4,000 | £3,950–£6,000 | £10,000–£14,000 |
| Range Rover Vogue (2010–2022) | L405 | 306DT / 30DDTX | £3,000–£4,500 | £4,500–£6,500 | £11,000–£15,000 |
| Land Rover Discovery 4 | L319 | 306DT / 30DDTX | £2,200–£3,500 | £3,500–£5,500 | £9,000–£12,000 |
| Land Rover Discovery 5 | L462 | 306DT | £2,500–£3,800 | £3,800–£5,800 | £9,500–£13,000 |
Labour alone accounts for £900–£2,200 of the total, depending on the model.
The Range Rover Vogue L405 carries the highest labour cost because the 3.0 TDV6 sits deeper in the engine bay with more ancillaries to disconnect.
Discovery 4 labour runs lower, typically £900–£1,400, because the L319 platform gives better engine bay access.
What Causes TDV6 Engine Failure and at What Mileage:
The TDV6 engine failure on 306DT and 30DDTX engines occurs in a predictable manner. Knowing these failure points can help owners determine if they should repair, rebuild or replace the entire unit.
- Failure of timing chain tensioner. The 306DT tensioner fails after 80,000 miles (128,000 km), and the symptoms are a rattle during cold start, which will subside in 30 seconds or less; the updated tensioner LR part LR029351 is critical in any rebuild.
- EGR (Exhaust Gas Recirculation) cooler crack. Known TDV6 fault after 60,000 miles (96,000 km): a cracked EGR cooler allows coolant to enter the intake manifold, resulting in white smoke and coolant loss. The cost of repair is £800-£1,800 if caught early.
- High-mileage 30DDTX engines over 120,000 miles (192,000 km) will develop crankshaft bearing wear, which will result in a continuous knock under load; if metal debris gets into the sump, the engine needs to be replaced.
- Oil-starved turbo actuators on the 306DT cause limp mode and boost loss after 90,000 miles (144,000 km). An actuator update LR part LR087442 prevents this.
- DPF (Diesel Particulate Filter) blockage occurs in all TDV6 diesels that are mainly used for short urban trips and leads to forced regeneration cycles, which over time increase oil dilution and bearing wear.
Crankshaft bearing collapse and timing chain debris contamination are the most common cases of TDV6 engine failure and must be replaced, not repaired. This is where it is not usually economical to machine the original block.
Used, Reconditioned or Rebuilt: Which Option Is Right?
| Option | Cost Range | Warranty | Internal Condition | Best For |
| Used 306DT / 30DDTX | £1,200–£2,500 (engine only) | 30 days–6 months | Unknown | Short-term fix, older models |
| 3.0 TDV6 reconditioned engine | £2,500–£4,500 (engine only) | 6–24 months | Verified, OEM parts | Owners keeping vehicle 3+ years |
| Engine rebuild (original block) | £2,800–£5,000 (parts + labour) | 12–24 months | Machined to factory tolerance | Sound original block, V5C retention |
| New OEM engine | £7,000–£11,000 (engine only) | 12 months JLR | Factory new | Newest models, main dealer only |
A 3.0 TDV6 reconditioned engine is the right choice for most owners because it delivers verified internal condition, new bearings, updated timing chain tensioner LR029351, resurfaced cylinder head and compression-tested to a minimum of 22 bar per cylinder at 40%–60% of new OEM cost.
The TDV6 engine rebuild cost UK for rebuilding the original block suits owners who want to retain the original engine number on the V5C, avoiding a DVLA logbook update that a replacement unit requires.
Range Rover Sport TDV6 Engine Cost:
Range Rover Sport TDV6 engine cost for a reconditioned 306DT (L494 chassis) runs £3,950–£6,000 supply and fit. The 30DDTX engine code fitted to L320 Sport models carries a slightly higher cost of £4,200–£5,500 due to lower parts availability compared to the more common 306DT.
Range Rover TDV6 supply and fit on the L494 Sport takes 5–7 working days at a JLR-specialist workshop, including post-installation SDD (Symptom-Driven Diagnostics) confirmation.
The Range Rover TDV6 supply and fit service must include ECU pairing; skipping this step leaves Terrain Response and DPF calibration mismatched.
Discovery 4 TDV6 Engine Cost:
Discovery 4 TDV6 engine cost for a reconditioned 306DT runs £3,500–£5,500 supply and fit, lower than the Range Rover Sport L494 because the L319 platform carries lower labour times.
The 30DDTX engine replacement in a Discovery 4 (pre-2010 models using the earlier code) runs £3,900–£5,500 due to higher parts cost on the older engine variant. Both codes require the updated tensioner LR029351 in any rebuild or reconditioning process.
What the TDV6 Warranty Covers and What to Check:
TDV6 engine warranty UK terms vary significantly between suppliers. A genuine warranty on a reconditioned 306DT or 30DDTX covers 4 minimum components: timing chain, crankshaft bearings, cylinder head gasket and valve stem seals.
Warranties covering “the block only” or “major mechanical failure” without named component lists are not sufficient; these exclusions eliminate precisely the parts most likely to fail.
TDV6 engine warranty UK duration should be a minimum of 12 months on a reconditioned unit. Warranties shorter than 6 months on a reconditioned engine indicate the supplier lacks confidence in the build quality.
Confirm the warranty document is in writing before approving any work. Verbal assurances are not enforceable if a fault develops at 8 months post-installation.
Oil specification matters for warranty validity. JLR-approved oil STJLR.03.5005 is mandatory on all TDV6 units; non-approved grades void most specialist warranties immediately and accelerate bearing wear on 306DT and 30DDTX units within the first 10,000 miles.
FAQs:
What is the Range Rover 3.0 TDV6 engine replacement cost UK?
Range Rover 3.0 TDV6 engine replacement cost UK for a reconditioned 306DT supply and fit ranges from £3,850 on a Range Rover Sport L494 to £6,500 on a Range Rover Vogue L405, depending on labour time and engine code variant.
What is the difference between the 306DT and 30DDTX engine codes?
Both are 3.0 TDV6 diesel units. The 306DT engine replacement applies to Range Rover Sport L494 (2013–2022) and Discovery 4/5. The 30DDTX engine replacement applies to Range Rover Sport L320 (2005–2013) and Vogue L405. The 30DDTX costs more to replace due to lower parts availability.
How long does a TDV6 engine replacement take?
TDV6 engine replacement cost timescales run 5–8 working days at a JLR specialist. The Range Rover Sport L494 and Vogue L405 take longer than the Discovery 4 due to engine bay access differences.
Is a 3.0 TDV6 reconditioned engine better than a used engine?
Yes. A 3.0 TDV6 reconditioned engine carries verified internal condition, updated tensioner LR029351, compression tested to 22 bar minimum, 12–24 month warranty. A used engine carries unknown bearing wear and timing chain history with no internal verification.
What does Discovery 4 TDV6 engine cost compared to Range Rover Sport?
Discovery 4 TDV6 engine cost for a reconditioned 306DT supply and fit runs £3,500–£5,500, approximately £400–£800 less than the equivalent Range Rover Sport TDV6 engine cost due to lower labour times on the L319 chassis.
Conclusion:
Range Rover 3.0 TDV6 engine replacement cost UK is determined by engine code, chassis and whether you choose used, reconditioned or a rebuild of the original block.
A 3.0 TDV6 reconditioned engine with a 12-month TDV6 engine warranty UK covering named components is the right choice for any owner planning to keep the vehicle beyond 2 years.
For Engine Rebuilds and Repairs, Diagnostic Expertise and Range Rover TDV6 supply and fit across all affected models, contact Jaguar and Land Rover Engine Specialists at jaguarlandroverengines.co.uk or call 02081241303.